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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 101 for “"Shear Strain"”.
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High Shear Strain Characterization of Plain Weave Fiber Reinforced Lamina
Strain energy driven deployable structures have recently become of high interest to the deployable space structures community. Made out of thin composite sections, these structures possess increased stiffness and stabilization while reducing payload masses significantly. The added capability of …
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Regulation of cartilage metabolism by dynamic tissue shear strain and the mechanical characterization of cartilage
… cartilage metabolism induced by dynamic tissue shear strain, and also the mechanical behavior under shear strain, especially focused on shear modulus, under different shear strain, frequency, compressive offset, and physiochemical environment. For this purpose, a new instrument was developed to …
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I, Crystallization and morphological studies of ICI's intermediate temperature semicrystalline (ITX) polymer and, II, The influence of deformation (shear strain) during bond formation on adhesive bond strength
… Dow DAF® 821 and Du Pont Surlyn® 1601. Lap shear bonds were sheared (// or ⟂ to load) during preparation to induce molecular orientation within the adhesive, before the mechanical properties were evaluated. The measured DAF 821 tensile strengths were similar, however, the Surlyn bond …
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Textural and Physical Properties of Fat-Free Turkey-Beef Frankfurters: Effects of Non-Meat Ingredients and End-Point Temperature
… values (total energy and peak force) but higher shear stress and shear strain. In addition, higher salt levels resulted in lower cooking loss, moisture content, protein content, and darker frankfurters. Increasing AW level reduced (P<0.05) penetration values (total energy and peak force), shear …
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Multiaxial fatigue damage model for random amplitude loading histories
… loading is proposed in this study. A normal strain based analysis incorporating the multiaxial state of stress is conducted along a critical orientation assuming a constant strain ratio. The dominant deformation direction is chosen to be the critical orientation which is selected with the …
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Investigation of Krypton bubbles in copper using x-ray techniques
… of the krypton bubbles manifests itself as a shear strain in the copper matrix and the shear strain is found to be below the yield strength of the copper matrix, thus explaining the long-term stability.
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The behaviour of sand at low stress levels in the simple-shear apparatus
… is concerned with the performance of the simple shear apparatus itself and its influence on the soil properties being measured. In Part II the comprehensive behaviour of Leighton Buzzard sand (<No.14 and) No.25 BS sieves) at low stress levels 1n the simple shear apparatus is presented and …
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The shear gage and compact shear specimen for shear property measurements of composite materials
Techniques for shear property measurements for composite and isotropic materials were investigated. A new strain gage called the shear gage was conceived, designed, and tested for routine shear characterization on notched shear specimens. The shear gage integrates the shear strain in the entire …
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Shear-band structure in metallic glasses
… structure evolves as a function of macroscopic strain. At low homologous temperatures (e.g., operating temperatures of common structural materials), strain localization into shear bands make these defects play a decisive role in controlling the plastic behavior of MGs. However, the …
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Assessment of the Cyclic Strain Approach for the Evaluation of Initial Liquefaction
… evaluation procedures include the stress-based, strain-based, and energybased based approaches. The existence of a volumetric threshold shear strain, γtv, under which there is no development of excess pore pressures, and the unique relationship between pore pressure ratio and cyclic shear strain, …
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Liquefaction and ring shear device
… in the liquefied material evolves at the high strain levels imposed as the slide progresses. Strength of liquefied granular soils is usually studied in the lab by means of the triaxial test, since the strains required to trigger liquefaction are low, compared with those observed after it has …
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Mechanics of Random -Fiber Networks: A Direct Simulation
… then extends the uniaxial compression to large shear deformation. A maximum shear strain of about 2.0 is applied. Results from the simulation are shown for the bulk shear stress, the number of fiber-fiber contacts and the fiber orientation. This simulation provides an interesting tool for …
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Extrusion honing using mixtures of polyborosiloxanes and grit
… a slit-die and a capillary rheometer. The shear history of the polyborosiloxane prior to testing with the capillary rheometer was found to significantly affect the results produced. At shear strain rates up to 100 s-1 and a temperature of 30°C the rheology of the polyborosiloxane has been …
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Uniaxial and triaxial behavior of high strength concrete with and without steel fibers
… study mainly focuses on the octahedral shear stress strain relationship of those two types of concrete, which is adopted as the basis to develop a new incremental constitutive model. Emphasis is also put on the investigation of the variation of tangent Poisson's ratio under not only …
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Microstructure and texture development during high-strain torsion of NiAl
… characteristics. By this deformation mode high shear strains (gamma = 18 in this study) can be imposed on the sample. The deformation conditions are well-defined because of the local deformation mode, which is simple shear. Due to the monoclinic sample symmetry one half of the pole figure is …
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An investigation of shear response of composite material systems
An investigation of shear response for various composite material systems is presented. The uniformity of the strain fields is studied experimentally and numerically for different specimen configurations. Conventional strain gage measurements and the moiré interferometry technique are employed to …
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Análise estática e dinâmica de vigas sandwich pelo método dos elementos finitos
… elements are also applied to beams where the shear strain has been taken into account. Programs have been developed both to the static and the dynamic analysis. The static analysis of a Cantilever sandwich beam has been done and for dynamical transversal load its response was obtained. The …
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Interlaminar Deformation at a Hole in Laminated Composites: A Detailed Experimental Investigation Using Moire Interferometry
… for both composite specimens. Distributions of strain were calculated with high confidence on a sub-ply basis at select angular locations. Measured strain behavior was complex and displayed ply-by-ply trends. Large ply related variations in the circumferential strain were observed at certain …
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Factors Influencing the Post-Earthquake Shear Strength
… energy on the cyclic behavior, post-cyclic shear strength and the degradation in shear strength due to cyclic loading in normally consolidated clays. Seventeen soil samples prepared in the laboratory from kaolinite, montmorillonite, and quartz were tested using static and cyclic simple shear …
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Static and free vibration analysis of advanced composites using shear-deformable rectangular plate finite elements
… finite elements based on a first order shear deformation plate theory and a refined higher order plate theory is presented. Special attention is given to the representation of transverse shear strain, the phenomenon of "shear locking", and the selection of the interpolating polynomial. …
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