Relevant bibliographies by topics / Fracture toughness; Mechanical properties

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Fracture toughness; Mechanical properties'

Author: Grafiati
Published: 4 June 2021
Last updated: 15 February 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Fracture toughness; Mechanical properties.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "Fracture toughness; Mechanical properties"

1

Murphy, B. R., and T. H. Courtney. "Mechanochemically synthesized NbC cermets: Part II. Mechanical properties." Journal of Materials Research 14, no. 11 (November 1999): 4285–90. http://dx.doi.org/10.1557/jmr.1999.0580.

Full text
Abstract:
The mechanical behavior of mechanochemically synthesized NbC cermets was investigated. Material hardnesses range from a high of 19.6 GPa for as-synthesized cermets containing about 4 vol% of Fe to a low of about 4 GPa for heat-treated cermets containing about 34 vol% Cu. Higher hardness generally correlates with lower fracture toughness (about 2 MPa m1/2 for cermets containing the highest percentage of NbC) and vice versa. Highest fracture toughness (about 7.5 MPa m1/2) is found in NbC–18 vol% Fe cermets heat treated extensively following consolidation. Abnormally low fracture toughnesses are found in high-Cu-content cermets in which Cu segregation takes place during heat treatment. Current models of ceramic toughening can be applied to describe the fracture behavior of NbC–Fe cermets.
APA, Harvard, Vancouver, ISO, and other styles
2

Biswas, Nilormi, Arjun Dey, Saugata Kundu, Himel Chakraborty, and Anoop K. Mukhopadhyay. "Mechanical Properties of Enamel Nanocomposite." ISRN Biomaterials 2013 (April 9, 2013): 1–15. http://dx.doi.org/10.5402/2013/253761.

Full text
Abstract:
For adult Indian premolar teeth, we report for the first time ever the simultaneous evaluations of nanohardness, Young's modulus, and fracture toughness of the enamel nanocomposite. The nanohardness and Young's moduli were evaluated from near the beginning of the middle enamel region to within ~10 μm of the dentino-enamel junction (DEJ) and in the dentin region using the nanoindentation technique. The fracture toughness from near the middle of the enamel region to near the DEJ zone was measured using the microindentation technique. The deformation was studied using scanning electron microscopy (SEM) and field emission scanning electron microscopy (FESEM). The relative differences in the extents of biomineralization in the enamel and dentin regions were studied by the energy dispersive X-ray (EDS) technique. The variations of the toughness of the enamel as a function of the toughness of the protein matrix phase have been analyzed which showed that the predicted value of the toughness of the protein present in the nanocomposite was comparable to that of other bioproteins reported in the literature. Further, the work of fracture estimated from the measured value of toughness of the enamel nanocomposite agreed well with the experimental data reported in the literature.
APA, Harvard, Vancouver, ISO, and other styles
3

Low, It Meng, Z. Y. Che, Bruno A. Latella, and K. S. Sim. "Mechanical and Fracture Properties of Bamboo." Key Engineering Materials 312 (June 2006): 15–20. http://dx.doi.org/10.4028/www.scientific.net/kem.312.15.

Full text
Abstract:
The microstructure, mechanical, impact and fracture properties of Australian bamboo have been investigated. The graded composition and property has been confirmed by depth-profiles obtained by synchrotron radiation diffraction and Vickers indentation. The mechanical performance of bamboo is stronly dependent on age. Results showed that young bamboo has higher strength, elastic stiffness and fracture toughness than its old counterpart. Both crack-deflection and crackbridging are the major energy dissipative processes for imparting a high toughness in bamboo.
APA, Harvard, Vancouver, ISO, and other styles
4

Min, Guang Hui, Li Xia Yang, Hua Shun Yu, and Jiande Han. "Mechanical Properties of CaB6 Sintered Body." Key Engineering Materials 297-300 (November 2005): 2707–12. http://dx.doi.org/10.4028/www.scientific.net/kem.297-300.2707.

Full text
Abstract:
In this paper, CaB6 sintered body was fabricated by hot-pressed sintering with/without nickel as a sintering aid. The microstructure and fracture morphology were observed by means of SEM. CaB6 polycrystalline hot-pressed at 2123K showed insufficient densification. Fracture surface revealed that the existence of pores and the poor grain boundaries made the occurrence of intergranular fracture. When 28wt% nickel was added, nearly full density was obtained, although the sintering temperature is 200K lower. Hardness, Bending strength and fracture toughness of polycrystalline CaB6 were measured. By adding the Ni in CaB6 matrix, the flexural strength and the fracture toughness were enhanced, and the ratio of transgranular to intergranular fracture type was increased notably. The fracture surface showed a transgranular fracture. The crack bridging, micro-cracking and crack deflecting were deemed as the contribution to the improved fracture toughness.
APA, Harvard, Vancouver, ISO, and other styles
5

Zhao, Jing Song, Yi Feng, Nan Nan Chen, Fan Yan Chen, Jie Chen, Xue Bin Zhang, Xiao Bing Pan, Jing Tu, and Xiao Ping Ouyang. "Fabrication and Mechanical Properties of Alumina—CNTs Composites." Applied Mechanics and Materials 66-68 (July 2011): 1390–96. http://dx.doi.org/10.4028/www.scientific.net/amm.66-68.1390.

Full text
Abstract:
The transmutation target of nuclear waste material has been fabrication by a powder metallurgy method by using Alumina as the matrix and CNTs as reinforcement. The effect of different nanotube contents on the fracture toughness and the bending strength was investigation. The results showed the fracture toughness and the bending strength of composites increased with increasing CNTs mass fraction when the content of CNTs was less than 1.5%. However, when the contents of CNTs greater than 1.5%, the fracture toughness and the bending strength of composites decreased as the content of CNTs increased. Possible mechanisms are discussed in detail in the paper.
APA, Harvard, Vancouver, ISO, and other styles
6

Zhang, Tao, Hai Yun Jin, Yong Ian Wang, and Zhi Hao Jin. "The Mechanical Properties of AlN/BN Laminated Ceramic Composites." Materials Science Forum 569 (January 2008): 97–100. http://dx.doi.org/10.4028/www.scientific.net/msf.569.97.

Full text
Abstract:
AlN/BN laminated ceramic composites were fabricated using tape-casting and hot-pressing by optimizing the designs of the structure and geometry of AlN/BN laminated ceramic composites. The results showed that the fracture toughness and bending strength for AlN/BN laminated ceramics reached 9.1MPa.m1/2 and 378MPa respectively. The fracture toughness is two times higher than that of AlN monolithic ceramics. The excellent fracture toughness of AlN/BN laminated ceramics could be mainly attributed to crack deflection, delaminating, branching, parallel propagation and crack laminate pilling out at the AlN/BN weak interface.
APA, Harvard, Vancouver, ISO, and other styles
7

Yuan, Zhi Shan, Zheng Lu, You Hua Xie, Xiu Liang Wu, Sheng Long Dai, and Chang Sheng Liu. "Mechanical Properties of a Novel High-Strength Aluminum-Lithium Alloy." Materials Science Forum 689 (June 2011): 385–89. http://dx.doi.org/10.4028/www.scientific.net/msf.689.385.

Full text
Abstract:
As a heat treatable aluminum alloy to be used in T6 and T8 temper, belongs to Al-Cu-Li system, a novel high-strength aluminum-lithium alloy 2A97 was developed. In order to improve the relationships of strength and ductility and fracture toughness, and to urge the applications in the aeronautical and aerospace industries, the effects of normal heat treatments and thermomechanical heat treatments on the mechanical properties and fracture toughness were investigated by Transmission Electron Microscope(TEM), Scanning Electronic Microscope (SEM), tensile test, and fracture toughness test. The results show that for the alloy aged at 135 °C for 24 h after quenching and 4 percent plastic deformation, its microstructures are strengthened by strain hardening and precipitation hardening, consisting of fine T1phase, θ″/θ′ phase and δ′ phase densely and homogeneously distributed in the matrix. It yields optimum relationship of strength and ductility, fracture toughness, its σ0.2, σband δ5are 454 MPa, 536 MPa, and 11.8%, respectively. It yields 43.5 MPa·m1/2of Kqvalues higher than that of 42.5 MPa·m1/2 in T6 temper. The fracture morphologies of impact tensile samples of fracture toughness test and normal tensile test were observed, indicating the dominance of intergranular failure and subintergranular failure with some dimples and trangranular failure.
APA, Harvard, Vancouver, ISO, and other styles
8

Wang, Zhi, Jiajia Zhou, and Long Li. "Fracture Mechanical Properties of Rocklike Materials Under Half Symmetric Loading." Archives of Civil Engineering 63, no. 4 (December 1, 2017): 71–82. http://dx.doi.org/10.1515/ace-2017-0041.

Full text
Abstract:
AbstractThe authors studied the fracture mechanical properties under half-symmetric loading in this paper. The stress distribution around the crack tip and the stress intensity factor of three kinds of notched specimens under half symmetric loading were compared. The maximum tensile stress σmax of double notch specimens was much greater than that of single notch specimens and the maximum shear stress τmax was almost equal, which means that the single notch specimens were more prone to Mode II fractures. The intensity factors KII of central notch specimens were very small compared with other specimens and they induced Mode I fractures. For both double notch and single notch specimens, KII was kept at a constant level and did not change with the change of a/h, and KII was much larger than KI. KII has the potential to reach its fracture toughness KIIC before KI and Mode II fractures occurred. Rock-like materials were introduced to produce single notch specimens. Test results show that the crack had been initiated at the crack tip and propagated along the original notch face, and a Mode II fracture occurred. There was no relationship between the peak load and the original notch length. The average value of KIIC was about 0.602 MPa×m1/2, and KIIC was about 3.8 times KIC. The half symmetric loading test of single notch specimens was one of the most effective methods to obtain a true Mode II fracture and determine Mode fracture toughness.
APA, Harvard, Vancouver, ISO, and other styles
9

Liu, Xue Quan, Cun Guang Ding, Chang Hai Li, Yi Li, Li Xin Li, and Jin Pu Li. "Microstructure and Mechanical Properties of Sintered Fibrous Monolith Cemented Carbide." Advanced Materials Research 815 (October 2013): 233–39. http://dx.doi.org/10.4028/www.scientific.net/amr.815.233.

Full text
Abstract:
A fibrous monolith cemented carbide with WC-6Co as cell and WC-20Co as cell boundaries was produced through hot co-extrusion process in this paper. The density, hardness, bending strength and fracture toughness of the fibrous monolith cemented carbide were tested, and the fracture and crack propagation were observed by metalloscope and SEM. The results showed that the bending strength and fracture toughness of the fibrous monolith cemented carbides was remarkably improved 71.91% and 45.7% respectively, while the hardness was slightly decreased 1% compared with WC-6Co composites. It is the reason that the tougher shell WC-20Co with higher bending strength and fracture toughness can absorb more fracture energy, which can slow down and prevent the crack propagating from brittle core WC-6Co.
APA, Harvard, Vancouver, ISO, and other styles
10

Sung, Rak Joo, Takafumi Kusunose, Tadachika Nakayama, Yoon Ho Kim, Tohru Sekino, Soo Wohn Lee, and Koichi Niihara. "Mechanical Properties of Transparent Polycrystalline Silicon Nitride." Key Engineering Materials 317-318 (August 2006): 305–8. http://dx.doi.org/10.4028/www.scientific.net/kem.317-318.305.

Full text
Abstract:
A novel transparent polycrystalline silicon nitride was fabricated by hot-press sintering with MgO and AlN as additives. The mixed powder with 3 wt.% MgO and 9 wt.% AlN was sintered at 1900oC for 1 hour under 30 MPa pressure in a nitrogen gas atmosphere. Transparent polycrystalline silicon nitride was successfully fabricated. The mechanical properties such as density, hardness, young’s modulus, fracture strength and fracture toughness were evaluated. The effect of α/β phase on the mechanical properties of transparent polycrystalline silicon nitride was investigated. The properties were changed depending on the amount of α/β phase. The hardness and Young's modulus increased with increasing the volume fraction of α-phase fraction as a reflection of the higher hardness of α-phase Si3N4. The fracture toughness and fracture strength decreased with decreasing the volume fraction of β-phase Si3N4.
APA, Harvard, Vancouver, ISO, and other styles
More sources

Dissertations / Theses on the topic "Fracture toughness; Mechanical properties"

1

Serbena, F. C. "The brittle-ductile transition of NiAl single crystals." Thesis, University of Oxford, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.294341.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Deva, Reddy Jayadeep. "Mechanical Properties of Silicon Carbide (SiC) Thin Films." Scholar Commons, 2007. https://scholarcommons.usf.edu/etd/210.

Full text
Abstract:
There is a technological need for hard thin films with high elastic modulus. Silicon Carbide (SiC) fulfills such requirements with a variety of applications in high temperature and MEMS devices. A detailed study of SiC thin films mechanical properties was performed by means of nanoindentation. The report is on the comparative studies of the mechanical properties of epitaxially grown cubic (3C) single crystalline and polycrystalline SiC thin films on Si substrates. The thickness of both the Single and polycrystalline SiC samples were around 1-2 µm. Under indentation loads below 500 µ-Newton both films exhibit Elastic contact without plastic deformation. Based on the nanoindentation results polycrystalline SiC thin films have an elastic modulus and hardness of 422 plus or minus 16 GPa and 32.69 plus or minus 3.218 GPa respectively, while single crystalline SiC films elastic modulus and hardness of 410 plus or minus 3.18 Gpa and 30 plus or minus 2.8 Gpa respectively. Fracture toughness experiments were also carried out using the nanoindentation technique and values were measured to be 1.48 plus or minus 0.6 GPa for polycrystalline SiC and 1.58 plus or minus 0.5 GPa for single crystal SiC, respectively. These results show that both polycrystalline SiC thin films and single crystal SiC more or less have similar properties. Hence both single crystal and polycrystalline SiC thin films have the capability of becoming strong contenders for MEMS applications, as well as hard and protective coatings for cutting tools and coatings for MEMS devices.
APA, Harvard, Vancouver, ISO, and other styles
3

Ozden, Seray. "The relationship between the anatomy and mechanical properties of different green wood species." Thesis, University of Manchester, 2016. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.684776.

Full text
Abstract:
Trees are exposed to many stresses over their lifetime and withstand them due to their woody skeleton which provides excellent mechanical support. Wood has therefore been one of the most used materials throughout the history of humanity. However, the mechanical properties of wood vary considerably depending on wood anatomy and also show significant differences between and within trees. Wood is a cellular solid, characterised by a high degree of anisotropy at all levels of organisation and is formed by cells which are oriented largely in the longitudinal and radial directions, making wood mechanics rather complicated. Therefore, there is a need for an understanding of the mechanical properties of wood in different species and in different parts of the tree and its relationship to wood anatomy. This study began with two investigations into the transverse toughness of green trunk wood in different tree species including both hardwood and conifers. Double-edge notched tensile tests were conducted on the specimens to quantify their specific fracture energies and evaluate their failure fashions. The influence of wood anatomy on the toughening mechanism of wood was observed using both electron microscopy and light microscopy. It was found that the fracture properties of woods were mainly affected by the wood density and anatomy. Hardwoods were found to have higher fracture energies than conifers due to their denser woods and higher volume fraction of rays. The results also found that the specific fracture energies of RL and RT systems were around 1.5-2 times greater than TL and TR systems. This difference was mainly explained by the presence of rays which provided toughness in the radial direction, at least in hardwoods, as breaking across rays resulted in spiral fractures of the cell walls. The mechanical properties of green branches and coppice shoots of three temperate tree species (chestnut, sycamore and ash), were then investigated at three distances from the tip. The study also investigated how bending failure was influenced by the morphology and anatomy of branches and coppice shoots. Coppice shoots were shown to be more likely to buckle in bending, whereas branches failed with a clean fracture. It was shown that ash and sycamore had greater properties in their coppice shoots than their branches, while chestnut showed better properties in their branches. It was suggested that this occurred because increasing the leaf node frequency resulted in a decrease in mechanical properties; ash and sycamore had more leaf nodes in their branches, thus lower properties in their branches, while chestnut had more leaf nodes in its coppices. The mechanical properties also decreased from base to tips of branches and coppice shoots because of falls in diameter of shoots and wood density. The results also suggested why coppice shoots can act as a useful structural material. Finally, this thesis investigated how and why the fracture properties vary around the structure of tree forks. The fracture properties of green hazel forks were examined using double-edge notched tensile tests in the RT and TR directions. The fracture surfaces were also observed using scanning electron microscopy in both fracture systems. The results showed that the central apex of forks were considerably tougher than other locations, suggesting they provide the load-bearing capacity of tree forks. It was shown that the increased toughness was related to both higher wood density and an interlocking wood grain pattern. Interestingly, the TR fracture system was found to be tougher than the RT fracture system at the central apex of forks, probably related to the orientation of the fibres. These results provide insight into the relationship between wood mechanics and anatomy, particularly showing the importance of rays. They can also help us understand how our ancestors shaped wood and designed tools and how we could design better structures.
APA, Harvard, Vancouver, ISO, and other styles
4

Alrahlah, Ali Awad. "Physical, mechanical and surface properties of dental resin-composites." Thesis, University of Manchester, 2013. https://www.research.manchester.ac.uk/portal/en/theses/physical-mechanical-and-surface-properties-of-dental-resincomposites(213a08bf-5791-4e1c-bce9-a45ca268d1d3).html.

Full text
Abstract:
Since resin composites were first presented to dentistry more than half a century ago, the composition of resin composites has developed significantly. One major change was that the reinforcing filler particles were reduced in size to generate materials of a given filler content that display better physical and mechanical properties. Resin composites may absorb water and chemicals from the surrounding environment but at the same time, composites may release constituents to their surroundings. The physical/mechanical properties of a restorative material provide an indication of how the material will function under stress in the oral environment. The aims of this research were to examine the effects of water at 37°C on the physical and mechanical properties, and the effect of food-simulating solvents of a variety of experimental and contemporary resin composites, on the surface properties. Eight representative resin composites were selected (Exp. VT, BL, NCB, TEC, GSO, XB, VDF and CXD). Due to the recent development of bulk fill materials on the market during the course of this research, the post-cure depth of cure of new bulk fill materials was also investigated. Five representative resin composites were selected: TBF, XB, FBF, VBF and SF. Water sorption and solubility were investigated at 37°C for 150 days. Sorption and solubility are affected by the degree of hydrophilicity of the resin matrix. The bulk fill materials examined showed the lowest water sorption and solubility. Laser scan micrometer (LSM) was used to investigate hygroscopic expansion. The extent of the hygroscopic expansion positively correlated with the amount of water sorption. The effect of water on fracture toughness was also examined. A self-adhesive hydrophilic resin matrix decreased in fracture toughness after 7 days of storage at 37°C. By contrast, the least water absorbed bulk fill material increased in fracture toughness over time. The effect of food-simulating solvents (distilled water, 75% ethanol/water and MEK) on surface micro-hardness, colour stability and gloss retention were investigated. The MEK solvent resulted in the lowest micro-hardness and the greatest colour change (ΔE) for most of the examined composites, while the 75% ethanol/water solution caused the greatest loss in gloss for most of the examined composites. A highly filled nano-composite showed the best result over time, regardless of the condition of storage. Surface micro-hardness profiles were used as an indirect method to assess the depth of cure of bulk fill resin composites. The examined bulk fill resin composites can be cured to an acceptable depth (4 mm).
APA, Harvard, Vancouver, ISO, and other styles
5

Pendse, Siddhi. "Morphological properties of poly (ethylene terephthalate) (PET) nanocomposites in relation to fracture toughness." Thesis, University of North Texas, 2005. https://digital.library.unt.edu/ark:/67531/metadc4845/.

Full text
Abstract:
The effect of incorporation of montmorillonite layered silicate (MLS) on poly (ethylene terephthalate) (PET) matrix was investigated. MLS was added in varying concentration of 1 to 5 weight percent in the PET matrix. DSC and polarized optical microscopy were used to determine the crystallization effects of MLS addition. Non isothermal crystallization kinetics showed that the melting temperature and crystallization temperature decrease as the MLS percent increases. This delayed crystallization along with the irregular spherulitic shape indicates hindered crystallization in the presence of MLS platelets. The influence of this morphology was related with the fracture toughness of PET nanocomposites using essential work of fracture coupled with the infra red (IR) thermography. Both the essential as well as non essential work of fracture decreased on addition of MLS with nanocomposite showing reduced toughness.
APA, Harvard, Vancouver, ISO, and other styles
6

Wang, Yanfei. "The improvement of thermal and mechanical properties of La2Zr2O7-based pyrochlores as high temperature thermal barrier coatings." Thesis, University of Manchester, 2013. https://www.research.manchester.ac.uk/portal/en/theses/the-improvement-of-thermal-and-mechanical-properties-of-la2zr2o7based-pyrochlores-as-high-temperature-thermal-barrier-coatings(2cb87afa-4650-4af4-a159-d1b4f2febb78).html.

Full text
Abstract:
To fully exploit the strengths of La2Zr2O7 pyroclores and promote them as a next-generation thermal barrier coating (TBC), the improvements of their thermally insulating property and fracture toughness are studied in this thesis. A strong phonon scattering source, rattlers, is found in Y3+-doped La2Zr2O7 pyrochlores. Rattlers dramatically flatten k (thermal conductivity)-T curves, or even make k approach the amorphous limit. The presence of rattlers is strongly dependent on (1) oversized atomic cages that are formed in pyrochlores; and (2) the occupation of smaller guest ions in those oversized cages. To maximize the rattling effect, In3+/Sc3+ ions that are much smaller than Y3+ are introduced to the La2Zr2O7 lattice. As envisaged, the smaller ions in the oversized lattice voids make k glass-like at a much lower doping content. Nevertheless, they are still not effective in reducing the high temperature plateau kmin. Instead, oxygen vacancies are very effective in reducing kmin, because they generate an electrostatic repulsion force among cations surrounding them, resulting in stronger lattice anharmonicity and weaker bonds. The plateau kmin is reduced dramatically by the filling of the B-sites in La2Zr2O7 with a 21% larger (and 50% heavier) Ce4+ guest ion rather than a 96% heavier (but similar-sized) Hf4+ ion, suggesting that a large absolute size of substitutional atoms is more effective in reducing kmin than a heavy absolute mass. This is because: (1) kmin is proportional to (E/M)0.5 (where E is the elastic modulus and M is the average atomic mass); (2) a larger size of guest ions tends to produce a weaker ionic bond and consequently, a lower E; and (3) the changing extent of E by introducing larger guest ions is much greater than that of M induced by adding heavier ones. Lastly, the fracture toughness (KIc) has been increased by dispersing the tetragonal 3 mol% Y2O3-stabilized zirconia (t-3YSZ) particulates in the La2Zr2O7 (LZ) matrix. The tendency of the dispersive t-3YSZ second phases transforming to monoclinic (m) phases strongly depends on the volume fraction introduced. For samples made from equilibrium route, they are toughened by phase transformations within the dispersive t-3YSZ second phases and a crack shielding effect arising from the residual compressive stress within the LZ matrix. An anticipated increase of KIc from ferroelastic toughening together with the residual compressive stress toughening highlights a potential to improve coating durability by depositing t’-3YSZ/LZ composite TBCs by the non-equilibrium route.
APA, Harvard, Vancouver, ISO, and other styles
7

Findikoglu, Gulin. "An Experimental Study Of Mechanical Properties Of Non Enzymatically Glycated Bovine Femur Cortical Bone." Phd thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12614536/index.pdf.

Full text
Abstract:
The aim of this study is to investigate the deterioration in mechanical integrity of the collagen network in bovine bone with aging, which are related to fracture toughness. Age-related changes in collagen molecular structures formed by non-enzymatic glycation were examined and indentation fracture technique was used as a method for measuring the microstructural toughness of cortical bone. Microcrack propagation characteristics of bone for fragility were also studied. Young and old group of bovine cortical bone specimens were grouped into 2 as ribosylated and non-ribosylated which were rested in solutions for four weeks. Series of indentations were made on bone specimen groups for each of five masses 10g, 25g, 50g, 100g and 200g for 10 sec to detect the effect of applied indentation load. The applied load was increased to 300g, 500g, 1000g and 2000g for 10 sec to be able to make microcracks. Series of indentations were made on bone specimen groups for each of five durations 5sec, 10sec, 20sec, 30sec for 100g to study the effect of indentation duration. Specimens were examined in the wet and dry state while studying the factors effecting microhardness measurement. Microhardness values measured by 10g of load for 10sec were indifferent between the ribosylated and non-ribosylated groups in the young and old bovine bone pointing that this load is not indicative of the structural collagen changes. Loads of 25g, 50g, 100g and 200g for 10 sec were able to differ ribosylated bone from non-ribosylated bone for the young and old bovine bones. Degree of microhardness increased with increased incubation period. Microhardness of dry specimens being either ribosylated or non-ribosylated were found to be statistically higher than wet specimens in young and old bone except for 10g for 10sec. It has been shown that the calculated fracture toughness measured by the indentation method is a function of indentation load. Additionally, effect of indentation size might have resulted in a higher toughness measurement for higher indent loads with longer cracks even if the toughness is not actually higher.Methods using indentation technique has difficulty in relating the resistance to crack growth to the Mode I fracture toughness definition.Indentation fracture toughness allows sampling only one point on the R­
curve methods and was not considered as successful for assessing materials with rising R­
curve. Toughness is ranked incorrectly among riboslated and non-ribosylated bovine bone by this technique. Presence of extrinsic toughening mechanisms including crack bridging due to uncracked ligaments and collagen fibers were directly observed by scanning electron microscope. Ribosylated bone was found to have lower number of collagen bridging compared ton on-ribosylated bovine bone.As a summary, indentation fracture method by Vickers indentation in bone is a method for measuring the fracture toughness.
APA, Harvard, Vancouver, ISO, and other styles
8

Sun, Fengzhen. "Mechanical Properties and Deformation Behaviour of Polymer Materials during Nanosectioning : Characterisation and Modelling." Doctoral thesis, Uppsala universitet, Tillämpad mekanik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-328906.

Full text
Abstract:
Research in local fracture processes and micro-machining of polymers and polymer-based composites has attracted increasing attention, in development of composite materials and miniaturisation of polymer components. In this thesis, sectioning (machining) of a glassy polymer and a carbon nanotube based composite at the nanoscale was performed by an instrumented ultramicrotome. The yield stresses and fracture toughness of these materials were determined by analysing the sectioning forces. Fractographic analysis by atomic force microscopy was conducted to characterise the topographies and elastic properties of the sectioned surfaces to explore the deformation and fracture behaviour of the polymer during nanosectioning. The study reveals that a transition from homogenous to shear localised deformation occurred as the uncut chip thickness (depth of cut) or sectioning speed increased to a critical value. Analytical and finite element methods were used to model the nanosectioning process. The shear localised deformation was caused by thermal softening due to plastic dissipation. Although not considering sectioning, the tensile properties of a polymer nanocomposite were additionally investigated, where the degree of nanofibrillation and polyethylene glycol (PEG) content had significant effects.
APA, Harvard, Vancouver, ISO, and other styles
9

Ngo, Austin. "Effects of Build Orientation and Post Processing on the Mechanical Properties of Additively Manufactured AlSi10Mg." Case Western Reserve University School of Graduate Studies / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=case1588623582368507.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Taveri, Gianmarco. "Geopolymers Incorporating Wastes and Composites Processing." Doctoral thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2019. http://www.nusl.cz/ntk/nusl-403861.

Full text
Abstract:
Buildings construction and realization of public infrastructures have always been a primary need in the human society, developing low cost and user-friendly materials which also encounter safety and durability requirements. Portland cement is the most used material in construction industry from the industrial revolution up to date, but the raising concerns related to the climate change are pushing the governments worldwide to replace it with more eco-friendly and greener materials. Geopolymers are considered to be best alternatives to Portland cement in construction industry, but issues related to cost and mechanical properties are still hindering the commercialization of this material. Geopolymer incorporating wastes is one of the solutions. Fly ash, a thermal power plant by-product, and borosilicate glass, a recycled glass from pharmaceutical vials, are suitable candidates in geopolymers activation. NMR and FTIR spectroscopies demonstrated that borates from borosilicate glass are active compounds in geopolymerization, substituting the alumina is its role, composing a B-Al-Si network never observed before. Various fly ash and borosilicate glass weight contents were studied in terms of mechanical properties (compression test, 3-point bending test). It was found that fly ash 55 wt.% and borosilicate 45 wt.% composition activated in 13 M NaOH solution holds the best compressive and flexural strength (45 and 4 MPa respectively), 25% stronger than similar counterparts found in literature. Cellulose fibres in different weight contents were dispersed into the geopolymeric paste to produce geopolymer composites, with the aim to render the material more suitable for structural applications. 3-point bending test showed an improvement of the flexural strength of about 165% (12 MPa), while the chevron notch method displayed a fracture toughness of 0.7 MPam1/2, in line with the results of geopolymer composites found in literature. In this thesis work, fly ash was also successfully densified in 3 M NaOH solution and distilled water through a new method based on hydraulic pressure, called hydro-pressure sintering. This innovative technology involves a drastic reduction of NaOH utilization in geopolymerization, rendering the material more eco-friendly. XRD spectroscopy conducted on produced samples revealed a higher formation of crystals, most likely induced by the application of hydraulic pressure (450 MPa).
APA, Harvard, Vancouver, ISO, and other styles
More sources

Books on the topic "Fracture toughness; Mechanical properties"

1

Fracture resistance of aluminum alloys: Notch toughness, tear resistance, and fracture toughness. Washington, D.C: Aluminum Association, 2001.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
2

Salem, J. A. Fracture toughness of Si₃N₄ measurement with short bar chevron-notched specimens. [Cleveland, Ohio: National Aeronautics and Space Administration, Lewis Research Center, 1985.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
3

S, Chatterjee. Measurement and utility of fracture toughness properties of irradiated pressure tube from the ring tension test. Mumbai: Bhabha Atomic Research Centre, 2004.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
4

T. A. C. M. van der Put. A new fracture mechanics theory of wood. New York: Nova Science Publishers, 2011.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
5

Strength and fracture of glass and ceramics. Amsterdam: Elsevier, 1992.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
6

International Conference on Deformation, Yield and Fracture of Polymers (6th 1985 Churchill College, Cambridge). Deformation, yield and fracture of polymers: Sixth International Conference on Deformation, Yield and Fracture of Polymers, Churchill College, Cambridge, 1-4 April1985. London (11 Hobart Place, SW1W 0HL): The Institute, 1985.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
7

Towers, O. L. Test for fracture toughness and fatigue assessment: A compilation of stress intensity, compliance, and elastic n factors. Cambridge, England: Welding Institute, 1985.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
8

Eckel, Martin. Überprüfung bruchmechanischer Versagenskonzepte durch Versuche an thermomechanisch gewaltzten Stählen. Düsseldorf: Stahleisen, 1991.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
9

Siewert, T. A. Fusion line shape versus toughness in HY-80 GMA welds. Boulder, Colo: U.S. Dept. of Commerce, National Bureau of Standards, 1986.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
10

Mechanical behavior of materials: Engineering methods for deformation, fracture, and fatigue. 2nd ed. Upper Saddle River, NJ: Prentice Hall, 1999.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
More sources

Book chapters on the topic "Fracture toughness; Mechanical properties"

1

Berdin, C., and C. Prioul. "Damage Kinetics and Fracture Toughness of Nodular Cast Iron." In Microstructures, Mechanical Properties and Processes - Computer Simulation and Modelling, 154–59. Weinheim, FRG: Wiley-VCH Verlag GmbH & Co. KGaA, 2005. http://dx.doi.org/10.1002/3527606157.ch24.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Taktak, Wafa, and Raidh Elleuch. "Fracture Toughness Resistance and Mechanical Tensile Properties of Cold Rolled CuZn30 Brass Alloy." In Lecture Notes in Mechanical Engineering, 231–39. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-84958-0_25.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Ojard, G., T. Barnett, M. Dahlen, U. Santhosh, J. Ahmad, and R. Miller. "Mode I Interlaminar Fracture Toughness Testing of a Ceramic Matrix Composite." In Mechanical Properties and Performance of Engineering Ceramics and Composites V, 195–206. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2010. http://dx.doi.org/10.1002/9780470944127.ch20.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Cadenas, P., A. Amrouche, G. Mesmacque, and K. Jozwiak. "Effect of the Residual Fatigue Damage on the Static and Toughness Properties." In Damage and Fracture Mechanics, 323–30. Dordrecht: Springer Netherlands, 2009. http://dx.doi.org/10.1007/978-90-481-2669-9_34.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Taktak, Wafa, and Riadh Elleuch. "The Pre-strain Impact on Tensile Properties and Fracture Toughness of AA5754-H111 Aluminum Alloy." In Lecture Notes in Mechanical Engineering, 259–66. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-84958-0_28.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Pharr, G. M., D. S. Harding, and W. C. Oliver. "Measurement of Fracture Toughness in Thin Films and Small Volumes Using Nanoindentation Methods." In Mechanical Properties and Deformation Behavior of Materials Having Ultra-Fine Microstructures, 449–61. Dordrecht: Springer Netherlands, 1993. http://dx.doi.org/10.1007/978-94-011-1765-4_29.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Mandal, P. K. "Grain Refinement Mechanism and Its Effect on Strength and Fracture Toughness Properties of Al–Zn–Mg Alloy." In Lecture Notes in Mechanical Engineering, 223–36. Singapore: Springer Singapore, 2017. http://dx.doi.org/10.1007/978-981-10-6002-1_18.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Driver, Robert G., Gilbert Y. Grondin, and Colin MacDougall. "Fatigue Research on High-Performance Steels in Canada." In Use and Application of High-Performance Steels for Steel Structures, 45–56. Zurich, Switzerland: International Association for Bridge and Structural Engineering (IABSE), 2005. http://dx.doi.org/10.2749/sed008.045.

Full text
Abstract:
<p>Compared to conventional structural grade steels, high-performance steel (HPS) pro­vides higher strength, improved weldability, greatly enhanced fracture toughness, and comparable ductility, as well as having "weathering" properties. The improved char­acteristics of HPS are achieved through lower levels of carbon and other elements, in conjunction with advanced steel-making practices using either quenching and tem­pering or thermo-mechanical controlled processing. All of these properties make HPS highly desirable for bridge applications. Indeed, although its development spans only the past decade, it is rapidly gaining popularity for use in highway bridges and is be­coming more widely available. Although many highway bridges have already been put into service in the United States, Canada has yet to implement this technology in bridges. Nevertheless, it is anticipated that the use ofHPS will become common in the Canadian market in the near future.</p>
APA, Harvard, Vancouver, ISO, and other styles
9

Quinn, G. D., and Jeffrey J. Swab. "Adventures and Misadventures in Applying ASTM Standard Test Method C 1421 to Measurements of the Fracture Toughness, KIC , of Glasses." In Mechanical Properties and Performance of Engineering Ceramics and Composites XI, 29–43. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2017. http://dx.doi.org/10.1002/9781119320104.ch3.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Dlouhý, I., V. Kozák, and M. Holzmann. "Toughness Scaling Model Applications." In Transferability of Fracture Mechanical Characteristics, 195–212. Dordrecht: Springer Netherlands, 2002. http://dx.doi.org/10.1007/978-94-010-0608-8_14.

Full text
APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "Fracture toughness; Mechanical properties"

1

Ganpatye, Atul S., and Vikram K. Kinra. "Fracture Toughness of Space Shuttle Foam." In ASME 2006 International Mechanical Engineering Congress and Exposition. ASMEDC, 2006. http://dx.doi.org/10.1115/imece2006-15789.

Full text
Abstract:
Fracture toughness of the rigid, low-density, closed-cell, polyurethane, foam used for insulation on the Space Shuttle External Tank is investigated. Data were obtained by loading double-edge-notched specimens in tension. To account for the anisotropic nature of the foam, two types, of specimens were tested so as to represent fracture properties along two different material directions. Additionally, for each type of specimen, two different notch sizes were tested.
APA, Harvard, Vancouver, ISO, and other styles
2

Curtin, Paul R., Steve Constantinides, and Patricia Iglesias Victoria. "Fracture Toughness of Samarium Cobalt Magnets." In ASME 2015 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/imece2015-53435.

Full text
Abstract:
Samarium Cobalt (SmCo) magnets have been the magnet of choice for a variety of industries for many years due to their favorable magnetic properties. Their high coercivity, combined with a low temperature coefficient, make them the ideal permanent magnet for demanding high temperature applications. One of the biggest concerns with rare earth magnets is their brittleness. Samarium Cobalt magnets in particular are prone to fracturing during machining and assembly. In manufacturing, great care must be taken to avoid chipping or fracturing these magnets due to their brittle nature. There are two main grades of Samarium Cobalt magnets, 1:5 and 2:17. These ratios define the nominal ratio of rare earth to transition metal content. In this paper, an investigation is performed on the fracture toughness of permanent magnets based on the Samarium Cobalt 2:17 composition. Various techniques are used to characterize the microstructure of the material, and quantify the material properties. Optical microscopy is used to characterize the grain structure of the material and quantify the porosity of the material after sintering. By comparing the average grain size and fracture toughness of several samples, grain size was shown to not affect fracture toughness in standard material. Latent cracks in defective material showed no preference to follow grain boundaries, oxides inclusions or voids. River marks in fracture surfaces are seen through scanning electron microscopy, confirming the transgranular cracking pattern seen by Li et al [1]This suggests that the toughness of the material is an inherent property of the main phase, not of grain boundaries or contaminants. Samarium Cobalt magnets exhibit both mechanical and magnetic anisotropy due to the alignment of their crystal structure in the manufacturing process. Using Palmqvist indentation crack techniques, the magnetic orientation of the grains was seen to greatly influence the direction of crack propagation from the tip of the indenter. Measurements of fracture toughness using this technique produce highly scattered data due to this anisotropic nature of the material. Specimens loaded with the indenter axis parallel to the direction of orientation show normal Palmqvist cracks, while specimens loaded perpendicular to the direction of magnetization exhibit crack propagation initiating from the faces of the indenter. To better quantify the material’s brittleness, fracture testing is performed on specially prepared samples to obtain an absolute measure of fracture toughness (K1c). Results show that SmCo is measurably weaker than other magnetic materials such as neodymium iron boron magnets[2]. Furthermore, neither relative concentration of Samarium nor source of raw material show notable effect on the fracture toughness of the material.
APA, Harvard, Vancouver, ISO, and other styles
3

Dzioba, I., and S. Lipiec. "Microstructure, strength properties and fracture toughness of S355JR steel." In FATIGUE FAILURE AND FRACTURE MECHANICS XXVI: Proceedings of the XXVI Polish National Conference on Fatigue Failure and Fracture Mechanics. Author(s), 2016. http://dx.doi.org/10.1063/1.4965948.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Li, Yan, and Min Zhou. "Prediction of Fracture Toughness via Microstructure-Level Simulations." In ASME 2012 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/imece2012-86342.

Full text
Abstract:
Microstructural design is an important approach for enhancing material properties such as fracture toughness at the macroscopic scale. Tasks in this regard require systematic quantification of both microstructure and material response. We report the development of a multi-scale computational framework based on the cohesive finite element method (CFEM) for predicting fracture toughness of materials as a function of microstructure. The approach uses the J-integral to calculate the initiation/propagation fracture toughness, allowing explicit representation of realistic microstructures and fundamental fracture mechanisms. Calculations carried out concern both brittle and ductile materials and focus on the effects of constitute behavior, phase morphology, phase distribution, and size scale on fracture toughness. Based on the CFEM results, a semi-empirical model is developed to provide a quantitative relation between the propagation toughness and statistical measures of microstructure, fracture mechanisms, and constituent and interfacial properties. Both the CFEM calculations and model predictions show that microstructure and constituent properties can significantly influence the fracture behavior and combine to determine the overall fracture toughness through the activation of different fracture mechanisms. In particular, a combination of fine microstructure size scale, rounded reinforcement morphology, and appropriately balanced bonding strength and compliance can best promote desirable crack-reinforcement interactions and lead to enhanced propagation fracture toughness. The CFEM framework, phenomenological model and the relations obtained can be useful tools for the design of failure-resistant materials.
APA, Harvard, Vancouver, ISO, and other styles
5

Mochizuki, Masahito, Masao Toyoda, Masayuki Inuzuka, and Hidehito Nishida. "Mechanical Properties and Fracture Toughness of Aluminum Vessels by Friction Stir Welding." In ASME/JSME 2004 Pressure Vessels and Piping Conference. ASMEDC, 2004. http://dx.doi.org/10.1115/pvp2004-2296.

Full text
Abstract:
Mechanical properties and fracture toughness in friction stir welded joint of vessels of structural aluminum alloy type A5083-O are investigated. Welded joint from 25 mm-thick plate is fabricated by one-side one-pass friction stir. Charpy impact energy and critical crack-tip opening displacement (CTOD) in friction stir weld are much higher than those of base metal or heat-affected zone, whereas mechanical properties such as stress-strain curve and Vickers hardness do not have a conspicuous difference. Effects of microstructure on crack initiation and propagation are studied in order to clarify the difference of fracture toughness between stir zone and base metal. Both tensile test and bending test show that the fine-grained microstructure in stir zone induces to increase ductile crack initiation and propagation resistance by analyzing fracture resistance curves and diameter of dimples in fracture surface. It is found that high fracture toughness value in stir zone is affected fine-grained microstructure by friction stirring.
APA, Harvard, Vancouver, ISO, and other styles
6

Baji, Avinash, Shing-Chung Wong, Todd Blackledge, Darrell Reneker, and Sureeporn Tripatanasuwan. "Mechanical Behavior and Toughness of Electrospun Polycaprolactone Nanofibers." In ASME 2007 International Mechanical Engineering Congress and Exposition. ASMEDC, 2007. http://dx.doi.org/10.1115/imece2007-41248.

Full text
Abstract:
This study examines the toughness and mechanical properties of biodegradable poly(ε-caprolactone) (PCL) with varying hydroxyapatite (HAP) content (0 – 30 wt%). Fracture toughness of HAP-filled PCL was also examined for the electrospun fibers using the essential work of fracture (EWF) concept. The electrospun fibers exhibited a diameter ranging from 200–500 nm and a combination of HAP particle sizes ranging from (50–100 nm) under the SEM. The tensile stress-strain behavior and fracture toughness of electrospun nanofibers were assessed using a nanoforce tensile tester. The electrospun system showed a substantial increase in plane-stress essential work of fracture in comparison to bulk specimens processed from pellets. Toughness decreased as HAP loading increased. The effect of simulated body fluid (SBF) on the mechanical properties was also studied. Mechanical properties including tensile strength and modulus were found to increase with HAP concentration in general. Compression molded electrospun nanofibers were spatially confined such that the tensile strength and stiffness of molded and spun fibers are remarkably higher than those from molded specimen of pellets.
APA, Harvard, Vancouver, ISO, and other styles
7

Cheng Zhu Liao and Sie Chin Tjong. "Fabrication, mechanical properties and fracture toughness of thermoplastic polyolefin filled with carbon nanofibers." In 2010 IEEE 3rd International Nanoelectronics Conference (INEC). IEEE, 2010. http://dx.doi.org/10.1109/inec.2010.5425009.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Sadeghipour, Keyanoush, Wenhai Wang, and George Baran. "Toward Improving Fracture Toughness of Particle-Reinforced Polymer Matrix Composites." In ASME 2013 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/imece2013-66221.

Full text
Abstract:
Experimental results have shown that polymer composites that have high fracture toughness tend to have high fatigue wear resistance. The work of fracture found in nacre (mother of pearl) is several orders of magnitude larger than the ceramic (aragonite) it is made of. The organic protein layers in the composite play a significant role in the mechanical response of nacre to stress. In this study, we hope to understand if an energy absorbing interphase similar to that found in nacre could have potential for toughening traditional, glass-particle-reinforced polymer composites. A multi-scale finite element model (FEM) has been developed to study the interaction between the crack and the reinforced particles. In this model, crack nucleation and propagation and the effect of particle/matrix/interphase material properties can all be characterized by the cohesive element and its traction-separation behavior. Loss of load carrying capacity begins when local deformation reaches a certain value, leading to the degradation of the material. Completely degraded elements form a traction-free crack surface. The most important advantage of this methodology for modeling fracture behavior is that macroscopic fracture criteria are not needed. 3-point bending macro-scale FEM serves to calibrate the deformation gradient of the study zone in front of the crack tip. A microscopic unit cell model was used to simulate the crack propagation. Three types of interphase were compared: (1) matrix and particle bonded without interphase, (2) matrix and particle bonded with silane interphase, and (3) matrix and particle bonded with beta-peptide (highly stretchable) interphase. Results show that the stress distribution around the filler and the bulk mechanical properties of the composite can be affected by changes in interfacial properties. Particle-reinforced polymer composites with a more compliant and stretchable interphase (e.g. beta-peptide) will help absorb local strain energy while remaining intact, allowing less damage within the matrix. This type of interphase decreases crack propagation speed and results in an increase of fracture toughness.
APA, Harvard, Vancouver, ISO, and other styles
9

Tenorio, Max, and Assimina A. Pelegri. "On Interfacial Fracture Toughness Measurements of a Single Glass Fiber." In ASME 2012 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/imece2012-89800.

Full text
Abstract:
The interfacial relationship between a glass fiber bundle and epoxy resin is investigated. A cylindrical notched specimen with a single bundle of fibers along the axis is created to observe debonding behavior. It is subsequently subjected to a quasi-static tensile test. The purpose of the test is to examine the interfacial debonding between fiber and resin from the point of breakage. All specimens reached a critical stress value and exhibited debonding to some degree. Experimental composite material properties are calculated and compared to technical data.
APA, Harvard, Vancouver, ISO, and other styles
10

Pathak, C. S., L. G. Navale, A. D. Sahasrabudhe, and M. J. Rathod. "Analysis of HAZ Fracture Toughness of Duplex Stainless Steel Weldment." In ASME 2009 International Mechanical Engineering Congress and Exposition. ASMEDC, 2009. http://dx.doi.org/10.1115/imece2009-11220.

Full text
Abstract:
Most of the serious weldment failures lead to catastrophic consequences in terms of damage to other equipment, loss of production, and risks to workers’ health and safety. Hence there is motivation to find margin between safety and disaster. This necessitates guaranteeing the integrity of a welded structure even if a crack is present. Therefore influence of the material inhomogenity and residual stresses on deformation and fracture behavior needs to be described precisely. A comparison of the applied load with a convenient material parameter is necessary for this purpose. Fracture mechanics parameters J integral & CTOD have attracted great interest in recent years. In case of base materials, fracture mechanics works quite well, but some specific problems occur if fracture mechanics principles are applied when examining the toughness properties of welded joints. These problems are mainly caused by the large difference in material properties and residual stresses. Existing fracture toughness testing can predict fracture behavior, but does not sufficiently address the problem associated with weldment testing. Three SENB duplex stainless steel weldment specimens were tested as per ASTM E1820. This standard is not recommended for weldment, but since no standard is available for testing duplex stainless steel weldment, authors preferred to use it as reference. The aim of this work is to explore the possibility of using the test results in the reliable prediction of weldment fracture and its correlation with microstructure and hardness.
APA, Harvard, Vancouver, ISO, and other styles

Reports on the topic "Fracture toughness; Mechanical properties"

1

Hicho, George E., and Donald E. Harne. Mechanical properties and fracture toughness of AAR TC128 grade B steel in the normalized, and normalized and stress relieved conditions. Gaithersburg, MD: National Institute of Standards and Technology, 1991. http://dx.doi.org/10.6028/nist.ir.4660.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Ardell, A. J. Fracture toughness of ordered intermetallic compounds exhibiting limited ductility and mechanical properties of ion-irradiated polycrystalline NiAl. Final report, July 1, 1986--June 30, 1997. Office of Scientific and Technical Information (OSTI), September 1997. http://dx.doi.org/10.2172/578758.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Hicho, G. E., and J. H. Smith. Mechanical properties and fracture toughness of AAR TC128 grade B steel and micro-alloyed, control-rolled steel, A 8XX grade B, from -80[degrees] F to + 73[degrees] F. Gaithersburg, MD: National Institute of Standards and Technology, 1990. http://dx.doi.org/10.6028/nist.ir.90-4289.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Ragalwar, Ketan, William Heard, Brett Williams, Dhanendra Kumar, and Ravi Ranade. On enhancing the mechanical behavior of ultra-high performance concrete through multi-scale fiber reinforcement. Engineer Research and Development Center (U.S.), September 2021. http://dx.doi.org/10.21079/11681/41940.

Full text
Abstract:
Steel fibers are typically used in ultra-high performance concretes (UHPC) to impart flexural ductility and increase fracture toughness. However, the mechanical properties of the steel fibers are underutilized in UHPC, as evidenced by the fact that most of the steel fibers pull out of a UHPC matrix largely undamaged during tensile or flexural tests. This research aims to improve the bond between steel fibers and a UHPC matrix by using steel wool. The underlying mechanism for fiber-matrix bond improvement is the reinforcement of the matrix tunnel, surrounding the steel fibers, by steel wool. Single fiber pullout tests were performed to quantify the effect of steel wool content in UHPC on the fiber-matrix bond. Microscopic observations of pulled-out fibers were used to investigate the fiber-matrix interface. Compared to the control UHPC mixture with no steel wool, significant improvement in the flexural behavior was observed in the UHPC mixtures with steel wool. Thus, the addition of steel wool in steel fiber-reinforced UHPC provides multi-scale reinforcement that leads to significant improvement in fiber-matrix bond and mechanical properties of UHPC.
APA, Harvard, Vancouver, ISO, and other styles
5

Morgan, M. T. The effects of hydrogen on the fracture toughness properties of upset welded stainless steel. Office of Scientific and Technical Information (OSTI), June 1995. http://dx.doi.org/10.2172/150898.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Redline, Erica Marie, Dan S. Bolintineanu, J. Matthew Lane, Mark J. Stevens, Todd M. Alam, and Mathias C. Celina. Improved Mechanical Performance Fracture Properties and Reliability of Radical-Cured Thermosets. Office of Scientific and Technical Information (OSTI), October 2016. http://dx.doi.org/10.2172/1330453.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Wibowo, J., B. Amadei, and S. Sture. Effect of roughness and material strength on the mechanical properties of fracture replicas. Office of Scientific and Technical Information (OSTI), August 1995. http://dx.doi.org/10.2172/95493.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Krentz, Timothy, Dale Hitchcock, Michael Morgan, Joseph Ronevich, Ryan Sills, Chris San Marchi, and Dorian Balch. Fracture Toughness Properties of Tritium Charged and Aged Stainless Steels: SRNL and SNL Collaboration Test Plan and 2018 Results. Office of Scientific and Technical Information (OSTI), February 2019. http://dx.doi.org/10.2172/1630269.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Morgan, Michael J. 2016 Accomplishments. Tritium aging studies on stainless steel. Forging process effects on the fracture toughness properties of tritium-precharged stainless steel. Office of Scientific and Technical Information (OSTI), January 2017. http://dx.doi.org/10.2172/1342715.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Morgan, Michael J. 2014 Accomplishments-Tritium aging studies on stainless steel: Fracture toughness properties of forged stainless steels-Effect of hydrogen, forging strain rate, and forging temperature. Office of Scientific and Technical Information (OSTI), February 2015. http://dx.doi.org/10.2172/1170524.

Full text
APA, Harvard, Vancouver, ISO, and other styles
You might also be interested in the extended bibliographies on the topic 'Fracture toughness; Mechanical properties' for particular source types:
Journal articles Dissertations / Theses Books
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography