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Material plastic properties characterization by coupling experimental and numerical analysis of small punch beam tests

Zhou, Xingguo and Pan, Wenke and Mackenzie, Donald (2011) Material plastic properties characterization by coupling experimental and numerical analysis of small punch beam tests. In: 19th Conference of the Association for Computational Mechanics in Engineering, ACME 2011, 2011-04-05 - 2011-04-06.

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Abstract

The small punch test method of characterizing material properties was introduced about thirty years ago. It has an advantage over conventional tensile test methods in that only a small sample of material is needed. A disadvantage of the method is that manufacture of the small hemispherical punch head is difficult and expensive due to the high dimensional accuracy requirements. Here an alternative design of punch is presented: a small punch beam test system consisting of a top die, a bottom die and a flat punch with semi-circular cross-section head. By coupling the numerical modelling and experimental results, a genetic algorithm has been used to characterize the material plastic properties.