Relevant bibliographies by topics / Open-hole tensile tests

Academic literature on the topic 'Open-hole tensile tests'

Author: Grafiati
Published: 10 December 2022
Last updated: 28 January 2023

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

Select a source type:

Contents

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Open-hole tensile tests.'

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 "Open-hole tensile tests"

1

Achard, Victor, Christophe Bouvet, Bruno Castanié, and Clément Chirol. "Discrete ply modelling of open hole tensile tests." Composite Structures 113 (July 2014): 369–81. http://dx.doi.org/10.1016/j.compstruct.2014.03.031.

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

Zhang, Xiao Qiong, Wei Guo Guo, and De Shuan Kong. "Damage Analysis of 2D Woven Composite Laminates Containing an Open-Hole under Tensile Loadings." Key Engineering Materials 525-526 (November 2012): 373–76. http://dx.doi.org/10.4028/www.scientific.net/kem.525-526.373.

Full text
Abstract:
In order to understand damage mechanism, the influences of lay-up construction of laminates and environgment on tension behavior of 2D woven composite laminates with an open-hole, which was manufactured by a new technology, uniaxial tension tests are performed in 3 different environments on 4 kinds of lay-up specimens, using a WE-50 electromechanical universal material testing machines. The fracture of specimens are analysed through micrographic observations. The result show that there is a large difference both in tensile strength and damage mechanism due to different kinds of lay-up specimens: 1) the tensile strength of specimens that only with ±45 degree laminated is much lower than other samples with different kinds of layup and its tensile stress-strain curves presents nonlinear; 2)The failure modes and damage mechanism determines the strength of specimens; 3)The change of environment had a certain effect on the mechanical behaviors of materials, in this paper, it will cause the tensile strength of speicmens decreasing.
APA, Harvard, Vancouver, ISO, and other styles
3

Strungar, Elena, Dmitrii Lobanov, and Valery Wildemann. "Evaluation of the Sensitivity of Various Reinforcement Patterns for Structural Carbon Fibers to Open Holes during Tensile Tests." Polymers 13, no. 24 (December 7, 2021): 4287. http://dx.doi.org/10.3390/polym13244287.

Full text
Abstract:
This paper is devoted to the experimental study of polymeric composite specimens, with various types of reinforcement, in order to evaluate the breaking strength of specimens with open holes when undergoing uniaxial compression and tensile tests. Four types of interlaced 3D woven preforms were considered (orthogonal, orthogonal combined, with pairwise inter-layer reinforcement, and with pairwise inter-layer reinforcement and a longitudinal layer), with a layered preform used for comparison. Tensile tests of solid specimens without a hole, under ASTM D 3039, and of specimens with an open hole, under ASTM D 5766, were carried out using the Instron 5989 universal electromechanical testing system. Movements and strains on the specimen surface were recorded using a Vic-3D contactless optical video system and the digital images correlation method (DIC). For all the series of carbon fiber tension specimens, strain and stress diagrams, mechanical characteristics, and statistical processing for 10 specimens were obtained. The paper evaluated deformation fields for certain points in time; the obtained fields showed an irregular distribution of deformation and dependency on types of reinforcing fibers. A coefficient of strength variation is introduced, which is defined as a ratio of the ultimate stress limits obtained on solid samples with and without open holes. Within the framework of ASTM D 5766, when calculating the ultimate stress, the hole is not taken into account, and the paper shows that for certain structures a hole cannot be excluded. The hole size must not be neglected when calculating the ultimate stress.
APA, Harvard, Vancouver, ISO, and other styles
4

Krajangsawasdi, Narongkorn, Ian Hamerton, Benjamin K. S. Woods, Dmitry S. Ivanov, and Marco L. Longana. "Open Hole Tension of 3D Printed Aligned Discontinuous Composites." Materials 15, no. 23 (December 6, 2022): 8698. http://dx.doi.org/10.3390/ma15238698.

Full text
Abstract:
This paper explores the use of Discontinuous Aligned Fibre Filament (DcAFF), a novel discontinuous fibre reinforced thermoplastic filament for 3D printing, to produce structural complex parts. Compared to conventional composite manufacturing, 3D printing has great potential in steering fibres around small structural features. In this current study, the initial thin carbon fibre (CF)-poly(L-lactic acid) (PLA) tape, produced with the High Performance Discontinuous Fibre (HiPerDiF) technology, is now reshaped into a circular cross-section filament, the DcAFF, using a bespoke machine designed to be scalable to high production rates rather than using a labour-intensive manual moulding method as in previous work. The filaments are then fed to a general-purpose 3D printer. Tensile and open-hole tensile tests were considered in this paper for mechanical and processability of DcAFF. The 3D printed specimens fabricated with the DcAFF show superior tensile properties compared to other PLA-based 3D printed composites, even those containing continuous fibres. Curvilinear open-hole tensile test samples were fabricated to explore the processability and performances of such material in complex shapes. The mechanical performance of the produced specimens was benchmarked against conventionally laid-up specimens with a cut hole. Although the steered specimens produced have lower strength than the fully consolidated samples, the raster generated by the printing path has turned the failure mechanism of the composite from brittle to ductile.
APA, Harvard, Vancouver, ISO, and other styles
5

Dave, Harshit K., Ashish R. Prajapati, Shilpesh R. Rajpurohit, Naushil H. Patadiya, and Harit K. Raval. "Open hole tensile testing of 3D printed parts using in-house fabricated PLA filament." Rapid Prototyping Journal 26, no. 1 (January 6, 2020): 21–31. http://dx.doi.org/10.1108/rpj-01-2019-0003.

Full text
Abstract:
Purpose Fused deposition modeling (FDM) is being increasingly used in automotive and aerospace industries because of its ability to produce specimens having difficult geometrical shape. However, owing to lack of critical information regarding the reliability and mechanical properties of FDM-printed parts at various designs, the use of 3D printed parts in these industries is limited. Therefore, the purpose of this paper is to investigate the impact of process parameters of FDM on the tensile strength of open-hole specimen printed using in-house-fabricated polylactic acid (PLA). Design/methodology/approach In the present study, three process parameters, namely, raster angle, layer thickness and raster width, are selected for investigation of tensile strength. To produce the tensile specimens in the FDM machine, the PLA filament is used which is fabricated from PLA granules using a single-screw extruder. Further, the experimental values are measured and critically analysed. Failure modes under tests are studied using scanning electron microscopy (SEM). Findings Results indicate that the raster angle has a significant effect on the tensile strength of open-hole tensile specimen. Specimens built with 0° raster angle, 200-µm layer thickness and 500-µm raster width obtained maximum tensile strength. Originality/value In this work, a new concept of testing a plate that has a rectangular shape and a circular hole at the centre is tested. Open-hole tensile test standard ASTM D5766 has been implemented for the first time for the FDM process.
APA, Harvard, Vancouver, ISO, and other styles
6

Wang, Hongxiao, Xiaohui Zhang, and Yugang Duan. "Investigating the Effect of Low-Temperature Drilling Process on the Mechanical Behavior of CFRP." Polymers 14, no. 5 (March 4, 2022): 1034. http://dx.doi.org/10.3390/polym14051034.

Full text
Abstract:
Previous research has found that lower temperature drilling is helpful to improve the hole quality of carbon fiber reinforced polymer (CFRP). However, the influence of the lower temperature drilling process on the mechanical behavior of composites is yet not fully understood. To examine the influence of the lower temperature drilling process on the mechanical behavior of CFRP, the open hole CFRP specimens used for mechanical tests were obtained with three cases: drilling with −25 °C/uncoated carbide drills/(1000 rpm, 0.02 mm/r), 23 °C/coated carbide drills/(4000 rpm, 0.03 mm/r), and 23 °C/uncoated carbide drills/(1000 rpm, 0.02 mm/r), respectively; corresponding, three groups of open-hole specimens are obtained: specimens drilling at low-temperature with low damage, specimens drilling at room-temperature with low damage and specimens drilling at room-temperature with low damage; the mechanical behavior of the three groups specimens were obtained by static tensile, tensile–tensile fatigue cyclic tests and residual tensile strength test. The results have shown that the mechanical properties of specimens with a low-temperature drilling process is lower than those of the specimen with a normal drilling process due to the better drilling quality. The damage accumulation in specimens was increased with the damage degree of the original hole, the greater the damage degree, the worse the mechanical properties.
APA, Harvard, Vancouver, ISO, and other styles
7

Feito, Norberto, José Vicente Calvo, Ricardo Belda, and Eugenio Giner. "An Experimental and Numerical Investigation to Characterize an Aerospace Composite Material with Open-Hole Using Non-Destructive Techniques." Sensors 20, no. 15 (July 26, 2020): 4148. http://dx.doi.org/10.3390/s20154148.

Full text
Abstract:
In this study, the open-hole quasi-static tensile and fatigue loading behavior of a multidirectional CFRP thick laminate, representative of laminates used in the aerospace industry, is studied. Non-destructive techniques such as infrared thermographic (IRT) and digital image correlation (DIC) are used to analyze the behavior of this material. We aim at characterizing the influence of the manufacturing defects and the stress concentrator through the temperature variation and strain distribution during fatigue and quasi-static tests. On the one hand, the fatigue specimens were tested in two main perpendicular directions of the laminate. The results revealed that manufacturing defects such as fiber waviness can have a major impact than open-hole stress concentrator on raising the material temperature and causing fracture. In addition, the number of plies with fibers oriented in the load direction can drastically reduce the temperature increment in the laminate. On the other hand, the quasi-static tensile tests showed that the strain distribution around the hole is able to predict the crack initiation and progression in the external plies. Finally, the experimental quasi-static tests were numerically simulated using the finite element method showing good agreement between the numerical and experimental results.
APA, Harvard, Vancouver, ISO, and other styles
8

Wisnom, M. R. "The role of delamination in failure of fibre-reinforced composites." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 370, no. 1965 (April 28, 2012): 1850–70. http://dx.doi.org/10.1098/rsta.2011.0441.

Full text
Abstract:
The mechanisms by which delamination contributes to the failure of fibre-reinforced composites are reviewed. Through-thickness failure owing to interlaminar stresses is considered first, and the effect of delamination in impact and compression after impact. The way in which in-plane failure can occur by delamination and matrix cracks joining up to produce a fracture surface without the need to break fibres is considered next. Examples of quasi-isotropic laminates loaded at different off-axis angles, and with different numbers and thicknesses of ply blocks show large differences in unnotched tensile strength controlled by delamination from the free edge. Similar mechanisms determine the strength of notched specimens and give rise to the hole size effect, whereby tensile strength increases with decreasing hole diameter owing to increased delamination and splitting. Open hole tension and over-height compact tension tests with constant in-plane dimensions show a transition in failure mode with increasing ply block thickness from fibre-dominated fracture to complete delamination. In all these cases, the critical factor controlling strength is the relative propensity to delaminate.
APA, Harvard, Vancouver, ISO, and other styles
9

Condruz, Mihaela Raluca, Ionut Sebastian Vintila, Tiberius Florian Frigioescu, Alexandru Paraschiv, Andrei Mandoc, Andreia Cucuruz, and Ionel Mindru. "Influence of Shelf Life on Mechanical Properties of Glass Fibre Reinforced Composites." Materiale Plastice 58, no. 1 (April 5, 2021): 131–41. http://dx.doi.org/10.37358/mp.21.1.5453.

Full text
Abstract:
The present paper was focused on studying the influence of shelf life of an epoxy matrix on the mechanical properties of glass fibre reinforced composites. For the study, two types of the same epoxy system were used, one during its shelf life and one out of its shelf life. The reinforcement used consisted in E-glass fibre fabric. Mechanical investigations were realized in order to compare the materials in terms of loss of mechanical strength and elastic properties. Therefore, three mechanical tests were performed: tensile tests, in-plane shear and open-hole tensile tests. The results showed that the shelf life affects the mechanical properties of the polymeric composite. A decrease of 24% in tensile strength was recorded along with a 28% decrease of the in-plane shear strength and 55% of open-hole tensile strength for the composite manufactured with the out of shelf life epoxy system compared with the other composite. An overall reduction of mechanical strength and elastic properties of the composite material was observed, primarily due to polymeric matrix degradation, which after long periods it could be prone to brittleness and susceptible to delamination and fracture. The thermogravimetric analysis showed that thermal induced changes are happening at a higher speed in the out of shelf life composite, a lower mass loss being registered for new epoxy composite.
APA, Harvard, Vancouver, ISO, and other styles
10

Hoos, Kevin, Endel V. Iarve, Michael Braginsky, Eric Zhou, and David H. Mollenhauer. "Static strength prediction in laminated composites by using discrete damage modeling." Journal of Composite Materials 51, no. 10 (June 2, 2016): 1473–92. http://dx.doi.org/10.1177/0021998316651986.

Full text
Abstract:
Discrete Damage Modeling of complex local failure patterns in laminated composites including matrix cracking, delamination, and fiber failure was performed. Discrete Damage Modeling uses the Regularized eXtended Finite Element Method for the simulation of matrix cracking at initially unknown locations and directions independent of the mesh orientation. Cohesive interface model is used both for Mesh Independent Cracking as well as delamination propagation. The fiber failure mode is modeled by two different methods in tension and compression. Tensile failure is predicted by Critical Failure Volume criterion, which takes into account volumetric scaling of tensile strength. Compression fiber failure is simulated with a single parameter continuum damage mechanics model with non-compressibility condition in the failed region. Ply level characterization input data were used for prediction of notched and unnotched laminate strength. All input data required for model application is directly measured by ASTM tests except tensile fiber scaling parameter and compression fiber failure fracture toughness, which were taken from literature sources. The model contains no internal calibration parameters. Tensile and compressive strength of unnotched and open hole composite laminates IM7/977-3 has been predicted and compared with experimental data. Three different layups, [0/45/90/−45]2S, [30/60/90/−60/−30]2S, and the [60/0/−60]3S, were modeled and tested and showed good agreement with experiment in the case of tensile loading, whereas the compressive strength was generally under predicted for unnotched laminates and overpredicted for open hole laminates.
APA, Harvard, Vancouver, ISO, and other styles
More sources

Dissertations / Theses on the topic "Open-hole tensile tests"

1

Arshad, Mubeen. "Damage tolerance of 3D woven composites with weft binders." Thesis, University of Manchester, 2014. https://www.research.manchester.ac.uk/portal/en/theses/damage-tolerance-of-3d-woven-composites-with-weft-binders(2b1435bc-fdb7-47c3-b555-ca5ea2883b4b).html.

Full text
Abstract:
3D woven composites, due to the presence of through-thickness fibre bridging, have the potential to improve damage tolerance and at the same time to reduce the manufacturing costs. However, the ability to withstand damage depends on weave architecture as well as the geometry of individual tows. A substantial amount of research has been performed to understand in-plane properties as well as the performance of 3D woven composites exposed to impact loads, but there is limited research on the damage tolerance and notch sensitivity of 3D weaves and no work is reported on the damage tolerance of 3D weaves with a weft binding pattern. In view of the recent interest in 3D woven composites, the influence of weft binder on the tensile, open hole tensile, impact resistance and subsequent residual compressive strength properties and failure mechanisms of 3D woven composites was investigated against equivalent UD cross-ply laminate. Four different 3D woven architectures; layer-to-layer, angle interlocked, twill angle interlock and modified angle interlock structures were produced under identical weaving conditions. All the above mentioned tests were performed in both the warp and weft directions on 3D woven and UD cross-ply laminates. Stress concentration and yarn waviness due to through-thickness reinforcement led to lower mechanical properties compared with the UD cross-ply laminate. However, improved in-plane and damage tolerance properties of 3D woven composites under tensile loads were achieved by modifying the weave architecture. The influence of the weave architecture and binder yarn orientation on the notch insensitivity and damage tolerance of 3D woven composites was less significant for compressive loads. Despite the lower undamaged compression strength of 3D woven structures, their residual compressive strength was found to be superior to their equivalent UD cross-ply laminates. The lower rate of strength reduction in the 3D woven fabrics laminates was attributed to a crack bridging mechanism, effectively inhibiting delamination propagation.
APA, Harvard, Vancouver, ISO, and other styles

Books on the topic "Open-hole tensile tests"

1

Moss, A. C. Fracture characteristics of carbon and aramis unidirectional composites in interlaminar shear and open hole tensile tests. Amsterdam: National Aerospace Laboratory, 1986.

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

E, Masters John, and Langley Research Center, eds. Standard methods for open hole tension testing of textile composites. Hampton, Va: National Aeronautics and Space Administration, Langley Research Center, 1995.

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

Conference papers on the topic "Open-hole tensile tests"

1

Hallett, Stephen, Wen-Guang Jiang, and Michael Wisnom. "The Effect of Stacking Sequence on Thickness Scaling of Tests on Open Hole Tensile Composite Specimens." In 48th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2007. http://dx.doi.org/10.2514/6.2007-2334.

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

Pan, Jan Wei, Jinquan Cheng, Tomonari Furukawa, Athanasios P. Iliopoulos, and John G. Michopoulos. "Experimental System and Validation for Energy-Based Characterization." In ASME 2011 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/detc2011-48902.

Full text
Abstract:
This paper presents the experimental system and experimental validation of an energy-based characterization for the identification of elastic constants. Unlike the standard uniaxial testing machine, which uses a contact strain sensor such as extensometer, the developed system uses a non-contact optic sensor as an advantage to measure and derive external work and strain measurements for characterizing the elastic constants. To investigate the validity of the energy-based characterization, a graphical user interface and the experimental system were developed for the tensile tests of aluminum open-hole specimens. During the validation, the means and variances of the characterization results were analyzed. The reliability of its recursive estimation was further investigated by the convergence of covariance at every new measurement. Results showed that the recursive estimation allows identification of elastic constants of a test coupon at every acquisition of sensor data in an online manner. The identification of all the constants during deformation thus demonstrated the overall validity and efficiency of the energy-based characterization.
APA, Harvard, Vancouver, ISO, and other styles
3

Kopriva, Radim, Petra Klatovska, Katerina Rusnakova, Petr Gal, Ivana Eliasova, and Dana Tonarova. "Optimization of Selected Parameters and Procedures in Small Punch Test Methodology." In ASME 2020 Pressure Vessels & Piping Conference. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/pvp2020-21024.

Full text
Abstract:
Abstract Assessment of reactor pressure vessels and other industrial components structural materials properties is currently based on the principles of using standardized and long-term employed methods of mechanical properties testing (e.g. impact tests, tensile tests). For the assessment of the current state and degradation prediction of an operated component, implementation of structural materials tests is nonetheless very complicated in terms of the availability of the material volume required to realization of tests in accordance with current normative documentation requirements. Due to the problematic material sampling from the operated component without affecting its integrity, more and more attention is paid to the implementation of perspective methods of evaluation of mechanical properties in processes of industrial component safe operation evaluation. These methods are mainly based on a semi-destructive approach allowing direct sampling of small volumes of material from the operated component and subsequent determination of mechanical properties using miniaturized test specimens. One of the most widespread perspective methods is the small punch test (SPT) - method based on the controlled deformation of thin sheets. The subject of the paper is the optimization of selected small punch test parameters, preparation technology of testing specimens and determination of suitable geometry of experimental fixtures, that are used for experiments in the testing laboratories. Within the experimental program attention is especially paid to the comparison of receiving hole edge configuration - radius/chamfer edge. The aim of the paper is to solve several open questions in the current state of small punch testing methodology and to obtain a comprehensive basis for the implementation of resulting recommendations into the process of currently ongoing standardization within the normative organizations ASTM and EN. This is achieved through a program of experimental tests and computational analyses (FEM) on the IAEA correlation material A533B (JRQ).
APA, Harvard, Vancouver, ISO, and other styles
4

Shah, Pranav D., Jose Daniel D. Melo, Carlos A. Cimini, and Jeffrey T. Fong. "Composite Material Property Database Using Smooth Specimens to Generate Design Allowables With Uncertainty Estimation." In ASME 2010 Pressure Vessels and Piping Division/K-PVP Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/pvp2010-26145.

Full text
Abstract:
For brevity, the class of “composite materials” in this paper is intended to refer to one of its subclasses, namely, the fiber-reinforced composite materials. In developing composite material property databases, three categories of data are needed. Category 1 consists of all raw test data with detailed information on specimen preparation, test machine description, specimen size and number per test, test loading history including temperature and humidity, etc., test configuration such as strain gage type and location, grip description, etc. Category 2 is the design allowable derived from information contained in Category 1 without making further experimental tests. Category 3 is the same design allowable for applications such that new experiments prescribed by user to obtain more reliable properties for the purpose on hand. At present, most handbook-based composite material property databases contain incomplete information in Category 1 (raw data), where a user is given only the test average values of properties such as longitudinal, transverse, and shear moduli, major and out-of-plane Poisson’s ratios, longitudinal tensile and compressive, transverse tensile and compressive, and shear strengths, inter-laminar shear strength, ply thickness, hygrothermal expansion coefficients, specific gravity, fiber volume fraction, etc. The presentation in Category 1 ignores the inclusion of the entire test environment description necessary for a user to assess the uncertainty of the raw data. Furthermore, the design allowable listed in Category 2 is deterministically obtained from Category 1 and the user is given average design allowable without uncertainty estimation. In this paper, it is presented a case study where average design allowable failure envelopes of open hole specimens were obtained numerically for two different quasi-isotropic carbon fiber-epoxy laminates using the appropriate Category 1 data. Using the method of statistical design of experiments, it is then showed how the average design allowable can be supplemented with uncertainty estimates if the Category 1 database is complete. Application of this methodology to predicting reliability of composite structures is discussed.
APA, Harvard, Vancouver, ISO, and other styles
5

Roos, Arne, Marcus Winkler, Georg Wimmer, Jorge F. Dos Santos, and Stefanie Hanke. "New Approach on Solid State Joining of Stainless Steel Tube to Tube Sheet Joints." In ASME 2017 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/pvp2017-65376.

Full text
Abstract:
Hybrid friction diffusion bonding (HFDB) is a solid-state bonding process first introduced by Helmholtz-Centre Geesthacht, Germany, to join aluminium tube-to-tube sheet joints of coil-wound heat exchangers (CWHE) for liquefaction of natural gas (LNG). This study describes how HFDB was in a first step successfully transferred to create austenitic S32100 single hole tube-to-tube sheet joints. Process parameters are presented and results from subsequent non-destructive bubble leak testing and destructive tensile pull-out testing are discussed. After pull out testing the bonded areas were further investigated using optical microscopy as well as scanning electron microscopy. Leak tight joints were generated due to the formation of a metallic bond close to the planar friction area of the employed tools, and failure in pull-out tests occurred by ductile fracture. The results show that the HFDB approach developed for Al-alloys may well be transferred to steel, and in the future possibly to other high-temperature alloys. It thereby offers an alternative route for joining tube to tube-sheet connections in solid state, with the corresponding advantages, such as no open flames or arc, no spatter and no need for filler material.
APA, Harvard, Vancouver, ISO, and other styles
6

Sasikumar, A., I. Cozar, O. Vallmajo, S. Abdel-Monsef, M. Delozzo, and A. Turon. "Estimation of Sensitive Material Properties of an Open Hole Tension Test of Composite Laminates." In VIII Conference on Mechanical Response of Composites. CIMNE, 2021. http://dx.doi.org/10.23967/composites.2021.098.

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

Zhang, Zhiyuan, Yuqiu Yang, and Hiroyuki Hamada. "Mechanical Property of Glass Mat Composite With Open Hole." In ASME 2012 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/imece2012-87270.

Full text
Abstract:
In using process, joints and fasteners always became the weakest area around holes and easy to generate initial damage. At current study, glass chopped fiber mat and unsaturated polyester were used to fabricate glass mat composite (GMC) plates. The influence of open-hole on mechanical property was investigated from tensile test. The decreasing ratio of notched strength from unnotched strength was compared with different size of holes to evaluate the influence of holes size on the sensitivity of GMC. Two sizes of drills, were employed to make drilling hole on the materials. Different damage areas in notched specimens were distinguished. Finally, in order to describe the property of GMC in resistance on open holes, the concept of characteristic distance was introduced. The values were calculated by finite element analysis software (MSC-Marc.) in linear elastic method. Furthermore, the characteristic distance was found that it had a good correspondence with damage characteristics.
APA, Harvard, Vancouver, ISO, and other styles
8

Ramulu, M., and Harinder Oberoi. "Edge Finishing Effects on Mechanical Properties of Composite Laminates." In ASME 2017 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/imece2017-72583.

Full text
Abstract:
Edge Finishing processes used in this study included Abrasive Water Jet and Carbide Router Endmilling for the trimming of the laminate material. For drilling of holes in the laminate material, Polycrystalline Diamond drills and Chemical Vapour Deposition (CVD) diamond coated carbide drills were used. Test material was machined with these processes and resultant surface integrity was recorded using a Surface Profilometer, Edge Replication using acetate tape and Scanning Electron Microscopy (SEM). The machining processes result in macroscopic defects which lead to the damage evolving with service loadings which can result in failure of the CFRP laminates in service. This study was conducted to research the effects of machining processes on residual strength of laminates. A 20 ply thick balanced symmetric [90/-45/0/-45/90/45/0/-45/0/90/0]s laminate was used in this study with a nominal thickness of 4.19 mm and with an average ply thickness of 190 μm. The laminate had a top layer of woven fabric material [0/90] and a bottom layer of fiberglass skin material. Mechanical testing was conducted on test specimens to failure for the tensile strength, compressive strength, open-hole tensile strength, open hole compressive strength and bearing strength. The failure mode and damage of the test specimens for each case was examined and discussed.
APA, Harvard, Vancouver, ISO, and other styles
9

CARPENTER, BRIAN, LANDON HENSON, REBECCA CUTTING, and MATTHEW MOLITOR. "COMPOSITE LAMINATE PROGRESSIVE DAMAGE FAILURE ANALYSIS BENCHMARKING USING HIGH FIDELITY INSPECTION DAMAGE MAPS FOR OPEN HOLE TENSION COUPONS AT TWO ENVIRONMENTAL CONDITIONS." In Proceedings for the American Society for Composites-Thirty Seventh Technical Conference. Destech Publications, Inc., 2022. http://dx.doi.org/10.12783/asc37/36508.

Full text
Abstract:
This paper presents an approach for using high fidelity test data to inform modeling methods on progressive damage failure analysis for composite open hole tension specimens at room temperature ambient and cold temperature dry conditions. To do this, the progressive damage failure models will use a publically available continuum damage mechanics based material model (MAT299) to represent lamina level damage in unidirectional composite systems within LS-DYNA. The models will be evaluated against a high fidelity experimental database from a project sponsored by the Office of Naval Research. The database consists of experimental data for the material system IM7/5320-1. Soft, medium, and hard laminates at each environmental condition will be the focus of this paper.
APA, Harvard, Vancouver, ISO, and other styles
10

Jaffar, Nurul Amyra, Nan Luan, and Edo Arisandi. "Novel Microemulsion Breaker System Remove Drill-in-Fluids Filter Cake and Remediate Near Wellbore Damage to Enhance Productivity of Horizontal Wells of Offshore Sabah, Malaysia." In Offshore Technology Conference Asia. OTC, 2022. http://dx.doi.org/10.4043/31684-ms.

Full text
Abstract:
Abstract In a case study of four wells located in offshore Sabah Malaysia, a field application using microemulsion technology to develop a customized in-situ breaker solution enhanced production rate by removing oil-based mud (OBM) and synthetic based mud (SBM) filter cake and remediating near-wellbore damage. All wells were completed as open–hole horizontal wells. Key challenges of the field are the multiple sand layers interbedded with intra-reservoir shale intervals necessitating a complex well trajectory and an operational preference for drilling with SBM drill-in fluid (SBM DIF). Lower than expected production rates were associated a water-impermeable SBM DIF filter cake and solids residue resulting from a conventional breaker system being unable to fully remove emulsion damage and effectively disrupt the filtercake. A series of laboratory tests for return permeability using formation cores from the offset wells and ceramic discs were completed as part of a feasibility study prior to field trials of the new microemulsion breaker system - a customized formulation consisting of a proprietary surfactant blend, organic acid, corrosion inhibitor and brine designed to remove the damage caused by the SBM DIF and restore open-hole flow conditions. The new breaker system has ultra-low interfacial tension which, when pumped into the open-hole section and allowed to soak for a sufficient period of time, diffuses into the rock matrix and forms an in-situ microemulsion completely and uniformly cleaning the near wellbore environment of SBM DIF residue, dispersing solids and leaving all surfaces water-wet. Laboratory results described in this paper show that the customized microemulsion breaker has the capability to remove SBM DIF filter cake, remediate emulsion damage caused by SBM-DIF, and restores the rock matrix back to its original permeability and predrilled state. All four wells in this field application have exceeded their expected production rate. The customized microemulsion breaker is the major contributing factor.
APA, Harvard, Vancouver, ISO, and other styles
You might also be interested in the extended bibliographies on the topic 'Open-hole tensile tests' for particular source types:
Journal articles
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