Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9561725 | Polymer Testing | 2005 | 7 Pages |
Abstract
One of the most important features when predicting the impact response of plastic components is the characterisation of the material in impact conditions. In this work, a new method to obtain stress/strain curves of thermoplastics at constant strain-rates is proposed. Instrumented tensile-impact tests have been performed on polypropylene samples at different impact energies. The use of tensile-impact techniques avoids some problems associated with flexural impact tests, and permits to determine the stress/strain curves and the strain-rate dependence of thermoplastics' behaviour in impact conditions. The results show that in the range of strain-rates analysed, polypropylene has an elastic-plastic behaviour with a slight plastic strain hardening. The isostrain-rate stress/strain curves can be used as material data in finite element simulations of impact events.
Related Topics
Physical Sciences and Engineering
Chemistry
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Authors
L. Aretxabaleta, J. Aurrekoetxea, I. Urrutibeascoa, M. Sánchez-Soto,