Thematische Bibliographien / Test specimens

Inhaltsverzeichnis

  1. Zeitschriftenartikel
  2. Dissertationen
  3. Bücher
  4. Buchteile
  5. Konferenzberichte
  6. Berichte der Organisationen

Auswahl der wissenschaftlichen Literatur zum Thema „Test specimens“

Autor: Grafiati
Veröffentlicht am 28. Juni 2021
Zuletzt aktualisiert am 7. Februar 2022

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Zeitschriftenartikel zum Thema "Test specimens"

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Bahadir, Fatih, und Fatih Süleyman Balik. „Seismic Performance Improvement of 3D Reinforced Concrete Frames with Different Strengthening Applications“. Applied Mechanics and Materials 789-790 (September 2015): 1140–44. http://dx.doi.org/10.4028/www.scientific.net/amm.789-790.1140.

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This study used test frames were purposely detailed and constructed with observed deficiencies in investigated dormitory buildings of Turkey. In this study, four reinforced concrete frames were produced two storeys, one bay and 3D in 1/6 geometric scale was tested. Since the studied frame was the external frame of the structure, brick infill wall with a window opening was also included. The first specimen was the reference specimen and contained no strengthening and no brick wall. The second specimen was contained brick wall. The third specimen was strengthened with internal steel panel. Finally fourth specimen’s was strengthened with infilled RC shear wall. The test specimens were subjected to reversed cyclic quasi-static lateral loading. Strength of the test specimens were measured and compared. Test results indicated that the strengthened specimens displayed significantly higher lateral strength than the reference specimen considerably.
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Deng, Jun. „Test Methods for Mechanical Properties of Structural Adhesives“. Advanced Materials Research 97-101 (März 2010): 814–17. http://dx.doi.org/10.4028/www.scientific.net/amr.97-101.814.

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One of the greatest drawbacks to predicting the behaviour of bonded joints has been the lack of reliable data on the mechanical properties of adhesives. In this study, methods for determining mechanical properties of structural adhesive were discussed. The Young’s modulus, Poisson’s ratio and tensile strength of the adhesive were tested by dogbone specimens (bulk form) and butt joint specimens (in situ form). The shear modulus and shear strength were test by V-notched specimens (bulk form) and thick adherend lap-shear (TALS) joint specimens (in situ form). The test results show that the elastic modulus provided by the manufacturer is too low, the dogbone specimen is better than the butt joint specimen to test the tensile strength and elastic modulus and the TALS joint specimen is better than the V-notched specimen to test the shear strength.
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Komorek, Andrzej, Jan Godzimirski und Marek Rośkowicz. „Analysis of a New Shape of Test Specimen for Block Shear Impact Test“. Materials 13, Nr. 7 (04.04.2020): 1693. http://dx.doi.org/10.3390/ma13071693.

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This paper reports and discusses an experimental comparison of metal specimens for impact strength research of adhesive connections with different shapes of the upper element. The top element of the specimen of the cuboid shape was replaced with a disc-shaped element. The experimental investigations were supplemented with dynamic numerical calculations of the tested cases. The results of the experimental studies indicate that the material applied to the produce of the top element of the block specimen deformed plastically as a result of applying the load, which further hinders the interpretation of already problematic investigation results. The numerical analysis confirms exceeding the yield point, by stresses, of the material that the specimen elements were made of. Modified specimens were characterized by only little greater repeatability of test results and greater impact strength caused by plastic deformations of the cylindrical specimen element.
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Parvez, Mohammad Masud, Yitao Chen, Sreekar Karnati, Connor Coward, Joseph W. Newkirk und Frank Liou. „A Displacement Controlled Fatigue Test Method for Additively Manufactured Materials“. Applied Sciences 9, Nr. 16 (07.08.2019): 3226. http://dx.doi.org/10.3390/app9163226.

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A novel adaptive displacement-controlled test setup was developed for fatigue testing on mini specimens. In property characterization of additive manufacturing materials, mini specimens are preferred due to the specimen preparation, and manufacturing cost but mini specimens demonstrate higher fatigue strength than standard specimens due to the lower probability of material defects resulting in fatigue. In this study, a dual gauge section Krouse type mini specimen was designed to conduct fatigue tests on additively manufactured materials. The large surface area of the specimen with a constant stress distribution and increased control volume as the gauge section may capture all different types of surface and microstructural defects of the material. A fully reversed bending (R = −1) fatigue test was performed on simply supported specimens. In the displacement-controlled mechanism, the variation in the control signal during the test due to the stiffness variation of the specimen provides a unique insight into identifying the nucleation and propagation phase. The fatigue performance of the wrought 304 and additively manufactured 304L stainless steel was compared applying a control signal monitoring (CSM) method. The test results and analyses validate the design of the specimen and the effective implementation of the test bench in fatigue testing of additively manufactured materials.
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Mughal, Z., E. Luff, O. Okonkwo und C. E. J. Hall. „Test, test, test – a complication of testing for coronavirus disease 2019 with nasal swabs“. Journal of Laryngology & Otology 134, Nr. 7 (Juli 2020): 646–49. http://dx.doi.org/10.1017/s0022215120001425.

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AbstractBackgroundCoronavirus disease 2019, a highly transmissible respiratory infection, has created a public health crisis of global magnitude. The mainstay of diagnostic testing for coronavirus disease 2019 is molecular polymerase chain reaction testing of a respiratory specimen, obtained with a viral swab. As the incidence of new cases of coronavirus disease 2019 increases exponentially, the use of viral swabs to collect nasopharyngeal specimens is anticipated to increase drastically.Case reportThis paper draws attention to a complication of viral swab testing in the nasopharynx and describes the premature engagement of a viral swab breakpoint, resulting in impaction in the nasal cavity.ConclusionThis case highlights a possible design flaw of the viral swab when used to collect nasopharyngeal specimens, which then requires an aerosol-generating procedure in a high-risk patient to be performed. The paper outlines a safe technique of nasal foreign body removal in a suspected coronavirus disease 2019 patient and suggests alternative testing materials.
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Yeoh, O. H. „Some Geometric Considerations for Rubber—Metal Bond Test Specimens“. Rubber Chemistry and Technology 79, Nr. 2 (01.05.2006): 320–37. http://dx.doi.org/10.5254/1.3547940.

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Abstract Most methods for predicting fatigue lives of rubber components rely heavily on experimental studies that involve specimens subjected to essentially uniform states of deformation. But, in service, rubber components often fail at or near rubber-metal bonds where the state of deformation is far from uniform. Before experimental studies of fatigue failure in the vicinity of rubber-metal bonds, it is prudent to perform an analysis of the specimen geometry to make sure it has been optimized. This paper reports on finite element analyses of cylindrical rubber-metal bond test specimens recommended in ASTM D 429. The results suggest that taller specimens (height/radius ratio ≥ 2) have some advantages. Interpretation in terms of the strain energy release rate is recommended. A new asymmetric test specimen is proposed.
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Mizuno, Satoshi, Toshifumi Kakiuchi und Yoshihiko Uematsu. „Fatigue Test of Small Sized AZ31 Magnesium Alloy Using Micropillar Specimen“. Key Engineering Materials 525-526 (November 2012): 165–68. http://dx.doi.org/10.4028/www.scientific.net/kem.525-526.165.

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The bending fatigue tests were performed using the small sized specimens of AZ31 magnesium alloy fabricated by the focused ion beam (FIB) processing to investigate the scale effect on the fatigue behavior. For the fatigue test of the small sized specimens, the fatigue testing apparatus was constructed by the piezo actuator and the high-resolution microscope for controlling the very small displacement. The specimen was micropillar-shaped with the rectangular cross section of 3μm x 8μm and the height of 40μm. The fatigue strengths of the small sized specimens were higher than those of the bulk sized specimens. The fracture surfaces were also investigated carefully compared with those of the bulk specimen.
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Tiernan, Peter, und Alan Hannon. „Optimisation of Cruciform Test Specimen for Biaxial Tensile Testing of Sheet Metal“. Advanced Materials Research 264-265 (Juni 2011): 114–22. http://dx.doi.org/10.4028/www.scientific.net/amr.264-265.114.

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One of the most restricting aspects of the biaxial tensile test for sheet metal is the design of the cruciform specimen. Although specimens of the cruciform type have previoussly been investigated quite extensively, no standard geometry for the cruciform specimen exists. Using a specifically designed pantograph apparatus for operation in a standard tensile testing machine, various cruciform specimens were analysed experimentally. Finite element modelling of the specimens was also conducted to establish optimum specimen geometry. Through a process of optimisation, a standard cruciform specimen was designed which can be used to accurately predict the mechanical behaviour of cold rolled low-carbon steel when formed in multiple directions simultaneously.
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Karcher, Donald S., und Christopher M. Lehman. „Clinical Consequences of Specimen Rejection: A College of American Pathologists Q-Probes Analysis of 78 Clinical Laboratories“. Archives of Pathology & Laboratory Medicine 138, Nr. 8 (01.08.2014): 1003–8. http://dx.doi.org/10.5858/arpa.2013-0331-cp.

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Context.—Clinical laboratory specimens may be rejected as unsuitable for analysis for a variety of reasons and specimen rejection may have significant clinical consequences. Objective.—To quantify the clinical consequences of specimen rejection and determine the impact of laboratories' policies and practices on these consequences. Design.—Participants prospectively reviewed consecutive blood and urine specimens submitted to the chemistry and/or hematology laboratories to identify rejected specimens. For each rejected specimen, the patient's age, specimen type, testing priority, rejection reason, time from specimen receipt to receipt of recollected/relabeled specimen, recollection method, and test result time were recorded. Specimen/test abandonment was determined by failure to recollect or relabel a rejected specimen. Each laboratory's policy regarding relabeling of incorrectly labeled specimens was recorded, along with how many relabeled specimens were subsequently discovered to be mislabeled. Results.—Specimen rejection led to a (1) high rate of specimen recollection, (2) delay in result availability (median of 65 minutes), and (3) high rate of specimen/test abandonment. Longer test result delay was associated with higher hospital bed size; and higher test abandonment rate, with failure of the laboratory to request specimen recollection. Relabeling of incorrectly labeled specimens was found to be of little benefit and was associated with a substantial percentage of subsequently mislabeled specimens. Conclusion.—Specimen rejection has significant clinical consequences, including patient discomfort, significant delay in result availability, and high rate of specimen/test abandonment. Allowing routine relabeling of incorrectly labeled specimens is a dangerous practice, with little measureable benefit and with an increased risk to patient safety.
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Muraya, P. M. „Homogeneous test specimens from gyratory compaction“. International Journal of Pavement Engineering 8, Nr. 3 (September 2007): 225–35. http://dx.doi.org/10.1080/10298430701289323.

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Dissertationen zum Thema "Test specimens"

1

Bois-Grossiant, Philippe Carleton University Dissertation Engineering Mechanical and Aerospace. „Boundary element fracture mechanics analysis of sandwich test specimens“. Ottawa, 1994.

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JAIN, RAHUL LALIT. „Effective Area and Effective Volume Calculations for Ceramic Test Specimens“. Cleveland State University / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=csu1218123485.

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Reynolds, Michael Scott. „A Relationship Between the Strengths of Type N Cubic Mortar Specimens and In-Situ Mortar“. BYU ScholarsArchive, 2019. https://scholarsarchive.byu.edu/etd/7572.

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The compressive strength of mortar is typically determined using the American Societyfor Testing and Materials (ASTM) standard method using 2 inch cubes which are compressed tillfailure. There is however a disparity between the compressive strengths of mortar cubes, and insitumortar. This disparity is a result of the differences in thickness, aspect ratio, curingconditions, water content, and confinement between mortar cubes and mortar joints. While thesedifferences lead to mortar joints being stronger than mortar cubes, a relationship between theirstrengths is desired.Two less-common mortar strength tests were used to determine more accurately thecompressive strength of in-situ mortar. The results of both tests were compared to the results ofASTM standard compressive testing with mortars of the same water content. The first was theDouble Punch test which involves the use of two metal punches that compress either side of athin mortar sample till failure. The Double Punch test is more difficult to perform than theASTM standard compression test, but was useful because it simulates the confinement that insitumortar will experience. The Double Punch test was also used with mortar specimens ofvarying thickness to determine a relationship between specimen thickness and compressivestrength. The second test used was the Helix Pullout test. This test is performed by insertingmetal helical screws into a mortar joint, and pulling from the joint while restricting rotation. Themaximum load used to extract the Helix is recorded as the Pullout Load, and is used to find thecompressive strength by use of a calibration curve. This test was used on a masonry wall paneland mortar cubes were also made with the same mortar for compressive testing.The tested mortar exhibited decreased compressive strength with increased water content.The mortar also decreased in strength with increasing specimen thickness. Mortar joints wereshown to be significantly stronger than mortar cubes based on factors of specimen thickness andconfinement by an average factor of at least 2.40. Although results are affected by punchdiameter, the Double Punch test was shown to be a consistent and reliable means of estimatingmortar compressive strength. The Helix Pullout test exhibited wide variation, and wasdetermined to be primarily useful for qualitative comparison as opposed to quantitativedetermination of strength.
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Moffett, Theodore James. „Relationship Between Compressive Strength of Different Shape and Thickness Specimens of Type S Mortar“. BYU ScholarsArchive, 2018. https://scholarsarchive.byu.edu/etd/8811.

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Mortar is the cementitious binding material placed between masonry blocks to create a composite system. The American Society of Testing and Materials (ASTM), along with other organizations, have established the testing of prismatic mortar specimens for evaluating mechanical properties, like compressive strength. Mortar joints, however, possess vastly different characteristics compared to prismatic specimens, especially in terms of geometry and water content. These differences prevent a direct comparison of compressive strength between prismatic specimens and actual mortar joints in the assembly. The objective of this study was to analyze Type S mortar joints, with particular emphasis on specimen shape and water content, to draw accurate comparisons of compressive strength to ASTM prescribed mortar prismatic specimens.To examine the effect of water on mortar compressive strength, three different water contents were evaluated across nearly all testing series. Cubic (2-in) and cylindrical (2 by 4-in) mortar specimens were prepared and tested according to ASTM guidelines to verify the compressive strength relationship described by ASTM and to be used as comparative data. In addition, a small masonry wall was assembled and cured in a laboratory to simulate true properties of mortar joints. Mortar joints subjected to testing were a combination of thin slices cut from prismatic specimens as well as in-place bed joints cured between concrete masonry units (CMU). Two unorthodox test methods, the double punch test (DPT) and helix pull-out test (HPT), were selected as methods for assessing mortar joints. In addition, confining effects from neighboring material common to DPT were evaluated as a function of specimen face dimensions. The compressive strength ratio obtained through testing of 2-in cubic and 2 by 4-in cylindrical specimens was lower than ASTM recommendations. This may have been in part due to testing cylindrical specimens with rough surfaces and no capping material. DPT confinement on 2-in square and 2-in diameter circular specimens was found to be equivalent. Thinly sliced specimens tested in DPT showed increases in compressive strength as water content and specimen thickness decreased. As a whole, DPT results on thin mortar slices showed promise for accurate comparison to prismatic mortar specimens. In-place mortar joints tested in HPT showed moderate to high scatter. In addition, evaluation via HPT was determined to be more appropriate for qualitative rather than quantitative assessments of in-situ mortar.
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Ranganathan, Kannan. „A simulation model for stress measurements in notched test specimens by x-ray diffraction“. Thesis, Virginia Tech, 1987. http://hdl.handle.net/10919/45887.

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An analytical model was developed to simulate the stress state of notched tensile specimens. Actual experiments are being carried out by other investigators to study the relaxation of residual stresses in specimens containing stress raisers. In the present work, the stress state developed in notched tensile specimens was assessed by determining the response of the stress state in the form of x-ray line profiles; this is useful in the understanding and measurement of effects due to such stress states obtained in actual experiments. The theoretical relationship between the stress gradient and the depth of penetration of the x-ray beam at the edge of a notch tensile specimen was also studied. In addition, the effect of changes in the radius of curvature of the notch-tip on errors in measured stress values is also considered. Furthermore, a description of the state-of-the-art x-ray system being used in the experimental work is also included.


Master of Science
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Heil, Joshua W. „Methods of Processing Kenaf Chopped Strand Mats for Manufacturing Test Specimens and Composite Structures“. DigitalCommons@USU, 2015. https://digitalcommons.usu.edu/etd/4376.

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Bio-composites are increasing in demand due to governmental incentives across the globe for both environmental and human health reasons. The ideal bio-composite is renewable, recyclable, available, and non-toxic. To properly engineer bio-composite products, the physical properties of the fiber as well as fiber/matrix interactions must be known. The problem lies in the fact that many suitable natural fibers are not currently available in a material form that may be easily worked with. This research investigates methods to process raw kenaf (hibiscus cannabinus) on a scale that allows researchers to make more consistent samples for testing. Though kenaf is highlighted, these processing methods may be applied to any natural fiber. The raw fibers are processed into kenaf chopped strand mats (KCSM) by adapting basic paper-making techniques. KCSM exhibit paper-like qualities and mechanical properties and provide a material of uniform thickness for use in composite parts. Also presented are a basic understanding of natural fiber constituents and effects of mechanical and co-mechanical treatments on those constituents. To test KCSM, samples are made for the ASTM D3039 tensile testing and for testing in a dynamic material analyzer (DMA). Both mechanically and chemo-mechanically processed samples are made for the purpose of comparison. Also, I-beam bridges are built with KCSM to demonstrate how KCSM may be used to create a structure. This is spurred on by the annual SAMPE bridge competition that includes special categories for natural fiber beams. The lay-up procedure is shown in detail to provide a framework that future competitors may use to build quality I-beams for this competition. The properties obtained by using the KCSM are competitive with other reported properties for kenaf-based composites. A kenaf I-beam demonstrates a strength-to-weight ratio that is 65% of a berglass I-beam built to the same dimensions. Trade-os of using KCSM are the random 2d-fiber orientation and brittle failure, which are not usually desirable in composite components. The chemically treated samples indicate a higher degree of crystallinity but demonstrate inferior mechanical properties when compared to the untreated samples.
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Stehn, Lars. „Fracture toughness of sea ice : development of a test system based on shevron notched specimens“. Licentiate thesis, Luleå tekniska universitet, Byggkonstruktion och -produktion, 1990. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-18782.

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Alkilicgil, Cigdem. „Development Of A New Method For Mode I Fracture Toughness Test On Disc Type Rock Specimens“. Master's thesis, METU, 2006. http://etd.lib.metu.edu.tr/upload/12607513/index.pdf.

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A new testing method was introduced and developed to determine Mode I fracture toughness of disc type rock specimens. The new method was named as Straight Notched Disc Bending and it uses disc specimens under three-point bending. 3D Numerical modeling was carried out with a finite element program ABAQUS to find stress intensity factors for both well-known Semi-circular Bending specimen models and Straight Notched Disc Bending specimen models for varying disc geometries. Both specimen types included notches where a crack front is introduced at the tip of the notch to compute the stress intensity factors. For stress intensity analysis, crack front-upper loading point distance and span length between the two roller supports at the bottom boundary of the specimens were changed. Fracture toughness testing was carried on Ankara Gö
lbaSi pink colored andesite for both specimen types
crack front-upper loading point distance and span length between the two roller supports at the bottom boundary of the specimens were changed during the tests. For both specimen geometries, notch lengths changing from 5 mm to 20 mm were used. For each notch length, two different roller supports with span lengths 60 mm and 70 mm were used. For both methods, fracture toughness values determined by using numerically computed stress intensity factors and failure loads obtained from the experiments were very close
the new method was verified by comparing the results. The new method had advantages of lower confining pressure at the crack front and lower stress intensities with a possible smaller crack tip plasticity region.
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Kohlman, Lee W. „Evaluation of Test Methods for Triaxial Braid Composites and the Development of a Large Multiaxial Test Frame for Validation Using Braided Tube Specimens“. University of Akron / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=akron1333047848.

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Baldassarri, Marco. „Measurement of LSP-induced residual stresses and fatigue life on thin-walled aluminium alloys specimens“. Master's thesis, Alma Mater Studiorum - Università di Bologna, 2014. http://amslaurea.unibo.it/7996/.

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This thesis work encloses activities carried out in the Laser Center of the Polytechnic University of Madrid and the laboratories of the University of Bologna in Forlì. This thesis focuses on the superficial mechanical treatment for metallic materials called Laser Shock Peening (LSP). This process is a surface enhancement treatment which induces a significant layer of beneficial compressive residual stresses underneath the surface of metal components in order to improve the detrimental effects of the crack growth behavior rate in it. The innovation aspect of this work is the LSP application to specimens with extremely low thickness. In particular, after a bibliographic study and comparison with the main treatments used for the same purposes, this work analyzes the physics of the operation of a laser, its interaction with the surface of the material and the generation of the surface residual stresses which are fundamentals to obtain the LSP benefits. In particular this thesis work regards the application of this treatment to some Al2024-T351 specimens with low thickness. Among the improvements that can be obtained performing this operation, the most important in the aeronautic field is the fatigue life improvement of the treated components. As demonstrated in this work, a well-done LSP treatment can slow down the progress of the defects in the material that could lead to sudden failure of the structure. A part of this thesis is the simulation of this phenomenon using the program AFGROW, with which have been analyzed different geometric configurations of the treatment, verifying which was better for large panels of typical aeronautical interest. The core of the LSP process are the residual stresses that are induced on the material by the interaction with the laser light, these can be simulated with the finite elements but it is essential to verify and measure them experimentally. In the thesis are introduced the main methods for the detection of those stresses, they can be mechanical or by diffraction. In particular, will be described the principles and the detailed realization method of the Hole Drilling measure and an introduction of the X-ray Diffraction; then will be presented the results I obtained with both techniques. In addition to these two measurement techniques will also be introduced Neutron Diffraction method. The last part refers to the experimental tests of the fatigue life of the specimens, with a detailed description of the apparatus and the procedure used from the initial specimen preparation to the fatigue test with the press. Then the obtained results are exposed and discussed.
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Bücher zum Thema "Test specimens"

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Robin, Cook. Standard fatigue test specimens for fastener evaluation. Neuilly sur Seine, France: AGARD, 1987.

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Li, Jian. Test and analysis of composite hat stringer pull-off test specimens. Hampton, Va: National Aeronautics and Space Administration, Langley Research Center, 1996.

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Materials, American Society for Testing and. Standard practices for mounting test specimens during sound absorption tests: Designation E795-00. West Conshohocken, PA: ASTM International, 2000.

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Shang, Yung-Cheng. Test marketing of giant clam as food and aquarium specimens in selected markets. [Waimanalo, Hawaii]: The Center, 1990.

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Standards Association of Australia. Committee BD/42, Methods of Testing Concrete. Methods of testing concrete: Method for making and curing concrete - compression and indirect tensile test specimens. 3. Aufl. [North Sydney, N.S.W.]: Standards Australia, 1985.

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Gallagher, Sean. Evaluation and comparison of Cel-Pn a commercially available immunofluorescence test for detection of Chlamyia pneumoniae in sputum specimens. [S.l: The Author], 1995.

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Corwin, WR, ST Rosinski und E. van Walle, Hrsg. Small Specimen Test Techniques. 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959: ASTM International, 1998. http://dx.doi.org/10.1520/stp1329-eb.

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Sokolov, MA, JD Landes und GE Lucas, Hrsg. Small Specimen Test Techniques: Fourth Volume. 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959: ASTM International, 2002. http://dx.doi.org/10.1520/stp1418-eb.

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Sokolov, Mikhail A., und Enrico Lucon, Hrsg. Small Specimen Test Techniques: 6th Volume. 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959: ASTM International, 2015. http://dx.doi.org/10.1520/stp1576-eb.

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Walak, Steven E. Heat pipe fatigue test specimen: Metallurgical evaluation. [Washington, DC]: National Aeronautics and Space Administration, 1992.

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Buchteile zum Thema "Test specimens"

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Gussev, Maxim N., Jeremy T. Busby, Kevin G. Field, Mikhail A. Sokolov und Sean E. Gray. „Role of Scale Factor During Tensile Testing of Small Specimens“. In Small Specimen Test Techniques: 6th Volume, 1–19. 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959: ASTM International, 2014. http://dx.doi.org/10.1520/stp157620140013.

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Zhu, Xian Kui. „More Accurate Elastic Compliance Equation and Its Inverse Solution for Compact Specimens“. In Fatigue and Fracture Test Planning, Test Data Acquisitions and Analysis, 212–26. 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959: ASTM International, 2017. http://dx.doi.org/10.1520/stp159820160057.

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Lucon, E., C. N. McCowan, R. L. Santoyo und J. D. Splett. „Certified KLST Miniaturized Charpy Specimens for the Indirect Verification of Small-Scale Impact Machines“. In Small Specimen Test Techniques: 6th Volume, 1–20. 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959: ASTM International, 2015. http://dx.doi.org/10.1520/stp157620140003.

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Valo, Matti J., Tapio K. Planman und Kim R. Wallin. „Rotation Point and KJC Estimations for Miniature CT-Specimens Based on Off-Load Line Displacement“. In Small Specimen Test Techniques: 6th Volume, 1–11. 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959: ASTM International, 2015. http://dx.doi.org/10.1520/stp157620140010.

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Suzuki, Shigekazu, Shinnosuke Sato, Miho Suzuki, Hiroshi Kinoshita, Shinji Sato, Shiro Jitsukawa und Hiroyasu Tanigawa. „Influence of Surface Roughness on Tensile Strength of Reduced-Activation Ferritic/Martensitic Steels Using Small Specimens“. In Small Specimen Test Techniques: 6th Volume, 1–9. 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959: ASTM International, 2015. http://dx.doi.org/10.1520/stp157620140019.

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Lacombe, Alexandra, Yann Landon, Manuel Paredes, Clément Chirol und Audrey Benaben. „Influence of the Hole Surface Integrity on the Fatigue Strength of an Aluminium Drilled Part“. In Lecture Notes in Mechanical Engineering, 34–40. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-70566-4_7.

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AbstractFatigue strengths of aluminium 2024-T351 open-hole specimens drilled by axial and orbital drilling processes are compared. Two drilling diameters (Ø) are studied: 6.35 mm and 9.53 mm. Surface integrity characterization tests are conducted in order to study the link between drilling processes, surface integrity and fatigue life. Fatigue test results show an increase of the fatigue life for specimens drilled by axial drilling for Ø = 9.53 mm and no significant difference in fatigue life between the two drilling processes for Ø = 6.35 mm. Surface integrity results show no impact of the roughness on the fatigue strength but a potential positive influence of the hole microhardness on the fatigue life.
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Chen, Xiang, Randy K. Nanstad und Mikhail A. Sokolov. „J-R Curve Determination for Disk-Shaped Compact Specimens Based on the Normalization Method and the Direct Current Potential Drop Technique“. In Small Specimen Test Techniques: 6th Volume, 70–87. 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959: ASTM International, 2014. http://dx.doi.org/10.1520/stp157620140012.

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Sato, Sachie, Yoshihiro Masuda und Hiroyuki Tanano. „Strength Development Properties of Core Specimens Taken from Structural Concrete Test Specimens Prepared All Over Japan“. In Lecture Notes in Civil Engineering, 599–605. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-5144-4_57.

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Rodrigues, Leonardo D., José L. F. Freire und Ronaldo D. Vieira. „DIC Strain Analysis of Pipeline Test Specimens Containing Metal Loss“. In Advancement of Optical Methods in Experimental Mechanics, Volume 3, 371–77. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-06986-9_44.

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Fernandes, António Augusto, Abílio M. P. de Jesus und Renato Natal Jorge. „Small-Scale Monotonic Test Data of Smooth and Notched Specimens“. In Monotonic and Ultra-Low-Cycle Fatigue Behaviour of Pipeline Steels, 35–105. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-78096-2_2.

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Konferenzberichte zum Thema "Test specimens"

1

Gautam, Sachin S., Ravindra K. Saxena und P. M. Dixit. „Fracture in Taylor Rod Impact Test Specimens“. In ASME 2010 International Mechanical Engineering Congress and Exposition. ASMEDC, 2010. http://dx.doi.org/10.1115/imece2010-37869.

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High velocity contact-impact problems are of great interest in industries related to aerospace, mechanical and civil engineering. Ductile fracture often occurs in such applications. Taylor rod impact tests are used as experimental and numerical tests for determining the mechanical behaviour of materials subjected to high strain rates. At sufficiently high velocities, a significant plastic deformation leading to fracture is observed. In this paper, ductile fracture in Taylor rod made of AISI1045 steel is simulated using a continuum damage mechanics model. Simulations are performed for the velocity of 250 and 300 m/s. It is observed that, at lower velocities, tensile cracks are observed at the outer edge of the impact surface. On the other hand, at higher velocities, the fracture is observed at the central axis (confined fracture) as well as at the outer edge leading to fragmentation. Both the results are consistent with the experimental results available in the literature.
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Cha, Dong-Wook, und Hyun-Yong Jeong. „A Fatigue Test Method for Tire Specimens“. In ASME 2010 International Mechanical Engineering Congress and Exposition. ASMEDC, 2010. http://dx.doi.org/10.1115/imece2010-38307.

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Crack growth in tires plays an important role in the durability of tires, and it is necessary to evaluate the characteristics of crack growth accurately. Since a tire is subjected to interlaminar shear stresses, a Mode III fatigue test method was developed. The fatigue life of three different tire specimens was measured by using the fatigue test method. Based on the fatigue test results, the effects of heat aging, temperature and belt stiffness on crack growth were analyzed.
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Dzugan, Jan, Radek Prochazka und Pavel Konopik. „Low Cycle Fatigue Tests With the Use of Miniaturized Test Specimens“. In ASME 2017 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/pvp2017-66174.

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Determination of mechanical properties with the use of sub-sized specimens is topic a high interest nowadays. The application of the sub-sized samples is quite wide for all cases where only limited amount of the experimental material is available such as evaluation of additively manufactured products properties, residual life of in-service components, properties determination of developed nano-structured materials, assessment of dilatometric samples used for thermal and thermo-mechanical treatment development, local properties of components, weld joints and so on. Concerning this large application field it would be very useful to prepare standard for small size samples especially for the most demanded material properties: tensile properties, notch impact transition temperature, fatigue properties, fracture toughness and creep. Current paper is going to deal with the low fatigue (LCF) properties assessment with the use of miniaturized specimens’. There were proposed specimen geometries with the use of FEM analysis and testing procedures for considered mini-specimens tests were developed. In the case of strain controlled LCF tests, contactless testing system had to be established for testing of small sized specimens, where it is not possible to apply standard mechanical extensometers for test control. Moreover, LCF procedure for high temperature tests was also successfully established here. The LCF results were subsequently used for Manson-Coffin parameters determination. Results of low cycle tests for several steels are confronted with the results of standard sized specimens with very good agreement for all considered conditions.
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Rosseel, Thomas M., Mikhail A. Sokolov und Randy K. Nanstad. „Machining Test Specimens From Harvested Zion RPV Segments“. In ASME 2015 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/pvp2015-45237.

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The decommissioning of the Zion Nuclear Generating Station (NGS) in Zion, Illinois, presents a special and timely opportunity for developing a better understanding of materials degradation and other issues associated with extending the lifetime of existing nuclear power plants (NPPs) beyond 60 years of service. In support of extended service and current operations of the US nuclear reactor fleet, the Oak Ridge National Laboratory (ORNL), through the Department of Energy (DOE), Light Water Reactor Sustainability (LWRS) Program, is coordinating and contracting with Zion Solutions, LLC, a subsidiary of Energy Solutions, an international nuclear services company, the selective procurement of materials, structures, components, and other items of interest from the decommissioned reactors. In this paper, we will discuss the acquisition of segments of the Zion Unit 2 Reactor Pressure Vessel (RPV), cutting these segments into blocks from the beltline and upper vertical welds and plate material and machining those blocks into mechanical (Charpy, compact tension, and tensile) test specimens and coupons for microstructural (TEM, SEM, APT, SANS and nano indention) characterization. Access to service-irradiated RPV welds and plate sections will allow through wall attenuation studies to be performed, which will be used to assess current radiation damage models [1].
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Xiao, Dawu, Yinglei Li, Shisheng Hu, Mark Elert, Michael D. Furnish, Ricky Chau, Neil Holmes und Jeffrey Nguyen. „STUDY OF SMALL DIMENSION SPECIMENS ON SHPB TEST“. In SHOCK COMPRESSION OF CONDENSED MATTER - 2007: Proceedings of the Conference of the American Physical Society Topical Group on Shock Compression of Condensed Matter. AIP, 2008. http://dx.doi.org/10.1063/1.2832923.

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Kitamura, Seiji, Masaki Morishita, Shuichi Yabana, Kazuta Hirata und Katsuhiko Umeki. „Shaking Table Tests With Large Test Specimens of Seismically Isolated FBR Plants: Part 1—Response Behavior of Test Specimen Under Design Ground Motions“. In ASME 2009 Pressure Vessels and Piping Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/pvp2009-77614.

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The seismic isolation technology is planned to introduce to the next generation’s fast breeder reactor (FBR) plants in order to reduce seismic load subjected to components. To grasp the ultimate behavior of a seismically isolated plant under extremely strong earthquake at a level beyond the design ground motions and to establish ultimate strength design methods of seismic isolators, we made a series of shaking table test with large test specimen of seismically isolated FBR plants. The ultimate behavior test was performed using one of the world largest three-dimensional shaking tables “E-Defense” of National Research Institute for Earth Science and Disaster Prevention of Japan to obtain ultimate behavior data of a technologically-feasible large scale model. Test specimen consists of concrete blocks, reinforced concrete walls and isolation layer with six laminated rubber bearing with lead plug (LBR). The gross mass of upper structure of the test specimen is about 600ton. The diameter of the LRB is 505mm that reduced prototype dimensions to about 1/3. In this study, the following three behaviors were assumed as the ultimate behavior of the seismic isolation system; 1) loss of response reduction function of the isolation system by hardening of rubber, 2) non-linear response behavior by the cracking of the concrete wall and 3) braking of the LRB. When the input acceleration level increased, the test specimen was designed to show the ultimate behavior in the above-mentioned order. The ultimate behavior test of the seismic isolation system was carried out on the condition of two input waves by using two test specimen sets of the same dimensions. In this paper, details of the test specimen including the LRB and loading conditions are described. Response behavior of the test specimen under design ground motions is also reported. The restoring force characteristics of the LRBs were stable. The response acceleration of a horizontal direction measured at the upper structure of the specimen was reduced. Prior to the ultimate behavior tests with strong input waves, the response reduction functions of the test specimen under design ground motions were confirmed.
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Le Delliou, Patrick, und Joumana El-Gharib. „Development of Test on Sent Specimens to Study Geometry Effects“. In ASME 2012 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/pvp2012-78110.

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The accurate prediction of ductile fracture behaviour plays an important role in structural integrity assessments of critical engineering structures under fully plastic regime, including nuclear reactors and piping systems. Many structural steels and aluminium alloys generally exhibit significant increases in fracture toughness, characterized by the J-integral, over the first few mm of stable crack extension (Δa), often accompanied by large increases in background plastic deformation. Conventional testing programs to measure crack growth resistance (J-Δa) curves employ three-point bend, SEN(B), or compact, CT. However, laboratory testing of fracture specimens to measure resistance curves (J-Δa) consistently reveals a marked effect of absolute specimen size, geometry, relative crack size (a/W ratio) and loading mode (tension vs. bending) on R-curves. These effects observed in R-curves have enormous practical implications in defect assessments and repair decisions of in-service structures under low constraint conditions. Structural components falling into this category include pressurized piping systems with surface flaws that form during fabrication or during in-service operation. This paper presents the on-going work to develop specimens and test procedures to study geometry effects (e.g., triaxiality effects) in the brittle to ductile transition of carbon-manganese steels, the basic idea being to compare the results obtained on these specimens with the results obtained on CT specimens. A clamped SENT specimen was chosen for this study. Finite element computations have been made to optimize the specimen shape and to develop the η-factor, the shape factor F (to compute K) and the normalized compliance μ. Preliminary tests have been conducted, showing that some adjustments of the test procedure should be made. Tests on new specimens are on-going.
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Jain, Rahul, James Lock und Stephen F. Duffy. „Effective Area and Effective Volume Calculations for Ceramic Test Specimens“. In ASME Turbo Expo 2009: Power for Land, Sea, and Air. ASMEDC, 2009. http://dx.doi.org/10.1115/gt2009-59028.

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The calculation of the effective volume and/or effective area is a key step in estimating the reliability of ceramic component life cycles. Most common tests performed to assess the strength of components made from ceramics are bend bar specimens tested in three-point and four-point flexure, C-ring and O-ring specimens under diametral compressive or tensile loads, and biaxial ring-on-ring specimens. ASTM closed form solutions [1] for the effective volume and area exist for specimen geometries based on classical theories with underlying assumptions. In general, the closed form expressions are valid for limited specimen geometry bounds. A discussion regarding the validity is presented via a numerical approach that computationally determines the effective volume and area for ceramic test specimens. The results obtained utilizing the numerical approach are compared with the closed form solutions. These comparisons point to the need for revisiting the underlying assumptions used in developing the closed form expressions. Finally, simple power law approximations are developed based on numerical results that directly give the effective volume and/or the effective area based on the Weibull modulus for the test geometries investigated in this research effort.
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Margolin, Boris, Vladimir Nikolaev, Valentin Fomenko und Lev Ryadkov. „Modification of Pre-Cracked Charpy Specimens for Surveillance Specimen Programs“. In ASME 2009 Pressure Vessels and Piping Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/pvp2009-77096.

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Application of pre-cracked Charpy specimens with various depth of side-grooves is considered for fracture toughness prediction. Recommendations for prediction of temperature dependence of fracture toughness are given when using small-sized specimens with deep side-grooves. Test results of about 500 specimens, cut from materials with various degrees of embrittlement are presented. On the basis of 3D calculations by finite element method the procedure used in standard ASTM E 1921 for calculation of Ke and J, is developed for bending specimens with deep side-grooves. An attempt is undertaken to explain the obtained experimental data from the standpoints of the available criteria of brittle fracture based on calculation analysis of stress and strain fields (SSF) of SE(B)-10 specimens with various depths of side-grooves.
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Gnaeupel-Herold, Thomas. „Through-Thickness Residual Stress Measurements on Springback Test Specimens“. In NUMISHEET 2005: Proceedings of the 6th International Conference and Workshop on Numerical Simulation of 3D Sheet Metal Forming Process. AIP, 2005. http://dx.doi.org/10.1063/1.2011221.

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Berichte der Organisationen zum Thema "Test specimens"

1

D. C. Crawford, S. L. Hayes, B. A. Hilton, M. K. Meyer, R. G. Ambrosek, G. S. Chang und D. J. Utterbeck. AFCI Fuel Irradiation Test Plan, Test Specimens AFC-1? and AFC-1F. Office of Scientific and Technical Information (OSTI), November 2003. http://dx.doi.org/10.2172/910603.

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Ratcliffe, Colin P., Roger M. Crane, Dean Capone und Kevin Koudela. Standardized Procedure for Experimental Vibration Testing of Damping Test Specimens. Fort Belvoir, VA: Defense Technical Information Center, Dezember 1998. http://dx.doi.org/10.21236/ada363069.

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Gdowski, G. Accounting of test specimens for the long-term corrosion testing. Office of Scientific and Technical Information (OSTI), Oktober 1995. http://dx.doi.org/10.2172/2652.

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Clayton, Dwight A., Dr Lev Khazanovich und Lucio Salles. Linear Array Ultrasonic Test Results from Alkali-Silica Reaction (ASR) Specimens. Office of Scientific and Technical Information (OSTI), April 2016. http://dx.doi.org/10.2172/1248797.

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Hollenbeck, J. L. Preirradiation Data summary for the GRIT-II HTGR irradiation test specimens. Office of Scientific and Technical Information (OSTI), Mai 1995. http://dx.doi.org/10.2172/83043.

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Miller, R. E. Manufacture and Preparation of Test Specimens for Johnson-Cook Material Characterization. Fort Belvoir, VA: Defense Technical Information Center, Januar 2013. http://dx.doi.org/10.21236/ada580817.

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Thomas, J. K., H. B. Peacock und N. C. Iyer. Examination of cadmium safety rod thermal test specimens and failure mechanism evaluation. Office of Scientific and Technical Information (OSTI), Januar 1992. http://dx.doi.org/10.2172/10141506.

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Thomas, J. K., H. B. Peacock und N. C. Iyer. Examination of cadmium safety rod thermal test specimens and failure mechanism evaluation. Office of Scientific and Technical Information (OSTI), Januar 1992. http://dx.doi.org/10.2172/5458924.

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Lebow, Stan T., und Patricia K. Lebow. Internal moisture content and temperature of standardized aboveground wood durability test specimens. Madison, WI: U.S. Department of Agriculture, Forest Service, Forest Products Laboratory, 2018. http://dx.doi.org/10.2737/fpl-rp-694.

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Hinman, C. A. Gamma irradiation test report of simulated grout specimens for gas generation/liquid advection. Office of Scientific and Technical Information (OSTI), Oktober 1994. http://dx.doi.org/10.2172/10192189.

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