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Showing 1 to 11 of 11 for “"Shear Yielding"”.
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Micromechanics of toughening in polymeric composites
… polymer (e.g., PC) that inelastically deform by shear yielding, and brittle polymer (e.g., SAN, PMMA) that undergo crazing in tension. The layer thicknesses are typically in the sub-micron to tens of micron range. We have modeled the deformation and axial tensile toughness of PC/PMMA …
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The fracture of epoxy resins and the effects of rubber inclusions
… based on cavitation of the rubber particles and shear yielding of the matrix is proposed. This accounts for the increased fracture toughness and other alterations in property in the rubber-modified material. The deformation and fracture data are used to calculate values of the crack opening …
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Finite Element Analysis of Single Plate Shear Connections
… have been several design models for single plate shear connections in the past 20 years. The current design model states that the bolt shear rupture strength of a connection is a function of the number of bolts and the a-distance, which is the distance from the weld line to the bolt line. The …
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Evaluating Shear links for Use in Seismic Structural Fuses
… reliability of structures. Buckling resistant shear panels can be used to form new structural systems, which have been shown in preliminary analysis to have improved hysteretic behavior including increased stiffness and energy dissipating ability. Both of these characteristics lead to reduced …
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Computational and Experimental Investigation of Seismic Structural Fuse Shapes for Structural Systems
… engineered cutouts leaving a configuration of shear-acting links remaining. There have been several studies on various cutout patterns for shear-acting structural fuses including butterfly-shaped links, hourglass-shaped links, elliptical holes, and link shapes obtained from topology …
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Characterization of Crazing Properties of Polycarbonate
… indicating competitive mechanisms of crazing and shear yielding. The draw stress was found to be a lower bound below which delayed necking will not occur in a reasonable time frame. The yield stress, elastic modulus, failure stress, and ductility were correlated to crazing stress, relative craze …
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Phase field modeling of the defect evolution and failure
… dislocations, obstacles and the applied resolved shear stress on a single slip plane. Two phenomena, the reverse plastic strain during cyclic loading and plastic strain recovery upon unloading, are studied. One major finding of our simulations is that these two plastic recovery processes are …
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Microporous polymeric membranes via melt processing
… structures are formed by a crazing mechanism. Shear yielding also occurs along with the crazing. The films were then subjected to heat setting at elevated temperatures to stabilize the porous structure which consisted of three-dimensional uniform microcracks in the order of a few hundred …
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Application of in situ full-field measurement in the transmission electron microscope: Mechanical property extraction from amorphous to crystalline materials
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2024-03-01 without embargo terms
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The role of molecular length scale on the viscoplastic response of amorphous polymer nanofibers in the glassy state
… state at room temperature have demonstrated shear yielding and large deformations that are not possible at the macroscale where PS fails at small strains due to crazing. This dissertation research focused on direct experiments with atactic PS nanofibers to elucidate and quantify the unusual …
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Fracture-induced mechanophore activation and solvent healing in poly(methyl methacrylate)
… established through tensile, compressive and shear tests. Spiropyran (SP) has been the chosen mechanophore and this molecule undergoes a ring opening reaction (activation) upon the application of mechanical stress. This activation is accompanied by a change in color and fluorescence as the …