Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 214 for “"tensile tests"”.
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A system for high strain rate interruptible tensile tests
… specimen was loaded repeatedly. In the MSc, a tensile SHPB (TSHB) was designed with momentum trapping to conduct interruptible tests on specimens. This configuration makes use of tandem momentum traps, allowing for the system to be fully trapped without the need for precisely preset gaps, or …
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Prediction of tear resistance of some aluminum and steel alloys by small scale tensile tests
Thesis: B.S., Massachusetts Institute of Technology, Department of Mechanical Engineering, 1961
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Rheological measures of the fracture toughness of hydrogels
… lenses and drug delivery. However, traditional tensile tests cannot be performed on soft hydrogels due to the soft and sometimes transient nature of their stiffness response. To address this issue, a method is proposed to determine the fracture toughness of a notched hydrogel using rheology, as …
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Microstructural analysis of plates with large strains as a result of central localised blast loading
… throughout the defonned plate to be analysed. Tensile tests were undertaken in order to calibrate this method of strain measurement. The tests were arrested during the loading, after the specimen had undergone a known amount of strain. The strain measured from the microstructure was then …
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Design of fixtures and specimens for high strain-rate tensile testing on a drop tower
Drop towers are used to perform mechanical tests at strain rates similar to those experienced in automobile crashes. By their nature, drop towers are configured to perform compression tests only. This project aims to design a set of fixtures and specimens to allow the machine to perform tensile …
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Determination of material properties of mild steel at different temperatures and strain rates
… was achieved by carrying out high temperature tensile tests at different strain rates on mild steel specimens. These experiments also helped set a methodology for carrying out high temperature tensile tests using a servohydraulic universal tester. Results from the tests indicated that increases …
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Synthesis and Characterization of Poly(arylene ether sulfone)s with Novel Structures and Architectures
… by NMR, SEC, DSC, TGA, melt rheology and tensile tests. The melt viscosities of these polymers in the high frequency region were lower than the control while the stress-strain properties were comparable to those of the control, suggesting that it is possible to reduce the high shear melt …
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Multiscale modeling of rate dependence and size effects on nanocrystalline metallic thin films
… allows us to simulate displacement-controlled tensile tests and load-controlled creep tests. The multiscale method is also adapted to simulate cases in which the separation of scales is valid in only two of the three spatial dimensions. Numerical implementations of the multiscale finite element …
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High-Strain Rate Tensile Characterization Of Graphite Platelet Reinforced Vinyl Ester Based Nanocomposites Using Split-Hopkinson Pressure Bar
… are characterized under both dynamic tensile and compressive loading. Dynamic direct tensile tests are performed applying the reverse impact Split Hopkinson Pressure Bar (SHPB) technique. The specimen geometry for tensile test is parametrically optimized by Finite Element Analysis …
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Mesoscopic Distinct Element Method for Multiscale Modeling of Carbon Nanotubes
… properties of CNTs. With the mDEM model, tensile tests of mesoscale CNT network were carried out, showing results in good agreement with experiments. The tensile tests revealed nanofriction was a key factor deciding the load transfer of CNT network. Our mDEM model serves as a powerful tool …
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Investigation into the Effects of Wire Mesh on Tensile and Impact Properties of Fiber Metal Laminates
… investigational study was conducted into the tensile and impact behavior of Fiber Metal Laminates by combining 5052 aluminum mesh or2024-T3 aluminum sheets,2.47 N (8.9 oz) or 6.67 N (24 az) ShieldStand<sup>®</sup> S fiberglass, and Hysol EA 9313 epoxy. Testing was performed under the …
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Mold design, fabrication and tensile testing of EMBed-812, a tissue embedding epoxy resin
… of precision. This thesis focuses on performing tensile tests to determine some of the material properties-elastic modulus, ultimate tensile strength, yield strength-of the epoxy resin used to embed fixed brain tissue. These results will be used in cutting models and help guide the development of …
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Fatigue of alumina at room and high temperatures
… and 1200$\sp\circ$C was investigated. Uniaxial tensile tests were conducted in both static and cyclic loading to produce stress-life curves. Cyclic loading at room temperature was found to be a deleterious effect on lifetime, as compared to static loading with a similar maximum stress. Cyclic …
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Susceptibility of creep aged material to stress relief cracking during repair welding
… zone are also investigated. This includes the tensile, toughness and hardness properties as well as inspecting the relevant microstructures. The effect of post weld heat treatment on these properties is also investigated. Section three investigates the phenomenon of creep. Not only is this …
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High temperature aging study on long-term aged Alloy 617 and Alloy 230
… is placed on the alloys aged for 10000 hours. Tensile and hardness tests were conducted. EDS coupled SEM and EBSD techniques were applied to reveal microstuctural characters of both alloys. Tensile tests were performed at strain rate of 10-3/s and in temperature range from room temperature to …
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Post-fire Mechanical Properties of Aluminum Alloys and Aluminum Welds
… properties were evaluated through static tensile tests and hardness testing on cooled samples. Using this data, an assessment was performed to investigate the relationship between hardness and mechanical properties. For the alloys evaluated, empirical relationships were found between …
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The effect of alloy chemistry and strain rate on the Md30 temperature of metastable austenitic stainless steels
… To achieve these objectives, uniaxial tensile tests at 0.3 true strain were performed at low and high strain rates (10-3s-1 and 3 x 10-2s-1 respectively), in the temperature range of -60 to 55°C under isothermal testing conditions.
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The corrosion fatigue behavior of notched 2024-T351 aluminum
Notched tensile tests and notched fatigue tests were performed at room temperature to study the corrosion fatigue behavior of aluminum alloy 2024-T351 in 3% salt solution. Notched characteristics of aluminum alloy 2024-T351 were found to be the same as those of other high strength aluminum alloys. …
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Mechanics and Fracture Behavior of Thermomechanical Bonds in Nonwoven Fabric
… their mechanical properties via uniaxial tensile tests and by computing the basis weight and orientation of the fibers surrounding the bonds. The results demonstrate that there is a high correlation between the fiber structure around the bond and the bond mechanical properties. The amount …
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Design, build and test of a planar biaxial tensile testing machine for skin and other collagenous soft tissues
… the design and construction of a planar biaxial tensile testing machine, suitable for ultimately testing skin and other soft membrane tissues. The mechanical properties of skin and other collagenous soft tissues are of interest to a wide range of researchers and professionals. Interests include …
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