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 49 for “"tension compression"”.
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Elastoplastic response of unidirectional graphite/aluminum under combined tension-compression cyclic loading
A test fixture for combined tension-compression cyclic testing of unidirectional composites was designed and characterized using 606l-O aluminum specimens. The elastoplastic response of graphite/aluminum l5° off-axis and 90° specimens under tension-compression cyclic loading was subsequently …
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A study of tension, compression, and shear test methods for advanced composites
… areas of interest. These areas were uniaxial tension, uniaxial compression and in-plane shear. Test methods were selected for tension, compression and shear and guidelines set for the entry of material property data into a comprehensive mechanical property database being undertaken by Virginia …
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Failure strength and mechanism of composite laminates under multiaxial loading conditions
… in both fill and warp directions. Biaxial tension-compression (BTC) and biaxial compression-compression (BCC) flat coupon specimens with flexible end reinforcements were designed and tested to study failure behaviors and mechanisms of composite laminates under a biaxial tension-compression …
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Influence of temper condition on the nonlinear stress-strain behavior of boron-aluminum
… was investigated. In addition to monotonic tension and compression tests, tension-tension, compression-compression, and tension-compression tests were conducted to study the effects of cyclic loading. The laminates studied were [0], [90], [±45]<sub>S</sub>, [0/±45/0]<sub>S</sub>, …
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Molecular Mechanics Simulations of Instabilities in 3D Deformations of Gold Nanospecimens
… gold crystals deformed in shear, simple shear, tension/compression, simple tension/compression, and triaxial tension/compression. The criteria used to delineate local instabilities in a system include the following: (i) a second order spatial derivative of the displacement field having large …
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Fatigue Performance of Brass Light Pole Couplings
… notched specimens of the first design in full compression-tension reversal using force control. An elastic tension-compression test was performed in order to determine both tensile and compressive stress concentration factors. In tension, Ktt=7.26, while in compression Ktc=6.80. Bending testing …
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Multiscale Numerical Modeling and Characterization of Carbon/Carbon Composites
… are proposed. Finally, on the macroscale, tension/compression testing is utilized to estimate elastic moduli of C/C composite specimens. Methods that are presented in this dissertation provide valuable tools applicable not only to carbon/carbon composites, but a wide range of …
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Origin of Creep-Fatigue Back Stress and its Effect on Deformation and Damage
… by systematic loading interruptions during tension-compression cyclic loading, from which the observed variations in macroscopic yield stress were correlated with corresponding changes in intergranular strains. In addition, development of creep cavitation damage was characterized using small …
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Mechanical characterization of aged recycled polymers and applications
… on the evaluation of mechanical properties (tension, bending, compression, impact, hardness and creep) of recycled acrylonitrile butadiene styrene (ABS) and polycarbonate (PC) thermoplastics obtained as electronic shredder residue (ESR) from computer housings. Three forms of polymers, i.e., …
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Fourth order spectral theory and diffusion-driven instability
… free rod equation u′′′′ − τ u′′ = μu under tension (τ > 0) or compression (τ < 0). The eigenvalues μ as functions of the tension/compression parameter τ exhibit three distinct types of behavior. In particular, eigenvalue branches in the lower half-plane exhibit a cascading pattern of …
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A continuum constitutive model for amorphous metallic materials
… the response of an amorphous metallic glass in tension, compression, strip-bending, and indentation is studied, and it is shown that results from the numerical simulations qualitatively capture major features of corresponding results from physical experiments available in the literature. The …
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The Piezoresistive Effect In Microflexures
… piezoresistivity exists for members in pure tension and compression. Extensions of this model to more complex loading conditions do not match experimental results. An accurate model of piezoresistivity in complex loading conditions would expand the design possibilities of piezoresistive …
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Numerical study of solder joint failure under fast loading conditions
… to the deformation mode, with a superimposed tension/compression on shear easily changing the crack path and tending to reduce the solder joint ductility. In addition, cyclic shearing resulted in different failure patterns from those of monotonic loading. The two fatigue cracks, one at (or …
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The behaviour of steel fibre reinforced concrete material and its effect on impact resistance of slabs
… work consists of testing concrete under tension, compression and flexure.
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Tactile sensors based on soft polymers
… gauge factor to all forms of stress, including tension, compression and shear. While its durability, inexpensive-ness and customizability make CB/PDMS makes it the quintessential active material for pressure-sensing skin, the material itself has not been well-characterized electrically or …
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Development of a device for multi-modal mechanical manipulation of cells in 2D and 3D engineering environment
… the mechanics of cells under various degrees of tension, compression and shear so that a better understanding of mechanotransduction can be obtained. Cells are seeded in a biocompatible medium and their force response is observed. The incorporation of tension, compression and shear stress in a …
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Effect of Continuity Plate Eccentricity on the Performance of Welded Beam-to-Column Connections
… through the beam flanges which create tension/compression force couples. Column sections that are incapable of resisting these flange forces are often retrofitted with continuity plates within the connection region to improve capacity. In cases of unequal beam depths on either side of …
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High-Temperature Performance of Carbon Fiber Reinforced Cyanate Ester Composites Filled with Nano-Ceramics
… process. Hand layup followed by the compression molding is used to fabricate carbon fiber-reinforced cyanate ester nanocomposite. Scanning electron microscopy (SEM) is performed very effectively for microanalysis and failure analysis of the composites. Tension, compression, and short …
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Co-deformation of an aluminum zinc alloy
… effect of large plastic deformation and finally tension compression tested to determine internal stresses. The bulk properties of the two phases are well known allowing for a detailed analysis of the composite properties when combined with the mechanical results. The material showed increased …
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Micromechanics of the through-thickness deformation of paperboard
… resulting crease. Experiments in out-of-plane tension, compression, and simple shear have been performed to investigate the behavior of paperboard under these simple loading conditions. The results show that normal and tangential delamination at the interfaces between layers is of extreme …
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