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Song, B, Chen, W, Montgomery, ST, Forrestal, MJ. Investigation of strain-rate effects in self-reinforced polypropylene composites. Characterizing nonlinear rate-dependent behaviors of graphite/epoxy composites using a micromechanical approach. Strain rate effect on mechanical behaviors of nylon 6-clay nanocomposites. Serration mechanism of AA5182/polypropylene/AA5182 sandwich sheets. Yielding behaviour in model epoxy thermosets - I. Effects of strain rate, temperature and thermomechanical coupling on the finite strain deformation of glassy polymers. Static and high strain rate response of a glass fiber reinforced thermoplastic. A study of the rapid deformation behaviour of a range of polymers. Walley, SM, Field, JE, Pope, PH, Safford, NA. An investigation of the mechanical properties of materials at very high rates of loading. The relation between true stress and true strain at the desired strain rate and increment was determined by collecting the load data from the equilibrium and deformation images. FEGM is utilized with images of the non-uniform distribution of deformation at each elongation stage captured by a high-speed camera in combination with a grid method. Since the deformation of polymers is accompanied by localized deformation and a conventional extensometry method is no longer valid for strain measurement, a force equilibrium grid method (FEGM) is newly proposed to acquire accurate true stress–true strain curves of polymers. Uniaxial tensile tests at strain rates ranging from 0.001 to 100 s −1 were conducted using a tensile testing machine (INSTRON 5583) and developed high-speed material testing machine. Tensile characteristics at the high strain rate are important in the prediction of deformation modes of polymeric components which undergo high-speed deformation during car crashes.
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This article is concerned with the tensile characteristics of polymers at various strain rates.