High-strain-rate characterization of TPOs and graphite/epoxy and graphite/peek composites

N. S. Brar; H. Simha; A. Pratap

doi:10.1117/12.429554

13 June 2001 High-strain-rate characterization of TPOs and graphite/epoxy and graphite/peek composites

N. S. Brar, H. Simha, A. Pratap

Proceedings Volume 4317, Second International Conference on Experimental Mechanics; (2001) https://doi.org/10.1117/12.429554
Event: Second International Conference on Experimental Mechanics, 2000, Singapore, Singapore

Abstract

Tensile and compressive stress-strain response of two types of TPOs and graphite-epoxy composites are investigated at strain rates in the range 0.001/s-1000/s. Specimen strain in the low strain rate regime 0.001-100/s was determined using an optical extensometer in conjunction with standard MTS machine. Tensile test at high strain rate were performed on newly developed tensile version of All- Polymeric Split Hopkinson Bar. Tensile TPO specimens in the dog-bone configuration are placed in specially designed grips fabricated from nylatron. Compression response of TPO specimens at high strain rate is determined using 25.4-mm diameter aluminum bars. Peak compressive stress increases from 10 MPa at a strain rate of 100/s to 35 MPa at a strain rate of 1000/s. Preliminary data on high strain rate tensile response of graphite-epoxy and graphite-peek composites are presented. These data are intended to develop a material model incorporating strain rate sensitivity for TPOs and to be used in car crash simulations.

Citation Download Citation

N. S. Brar, H. Simha, and A. Pratap "High-strain-rate characterization of TPOs and graphite/epoxy and graphite/peek composites", Proc. SPIE 4317, Second International Conference on Experimental Mechanics, (13 June 2001); https://doi.org/10.1117/12.429554

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