International Journal of Aerospace and Lightweight Structures

doi: 10.3850/S2010428615100060

Mechanical Behavior of Aluminum Alloyover a Wide Strain Rate and Temperature Range

Lei Dai¹, Tao Suo², Zhong-bin Tang², Bu-sheng Zhang², Zhi-qiang Wang¹ and Liang Hou^{1 1}Shanghai Engineering Research Center of Civil Aero Engine, AVIC Commercial Aircraft Engine Co., LTD Shanghai, 201108, China. ²School of Aeronautics, Northwestern Polytechnical University, Xi’an, Shanxi, 710072, China.

ABSTRACT

In this work, the compressive mechanical behavior of a kind of aluminum alloy was experimentally investigated over a wide temperature and strain rate range. The coupling effects of temperature and strain rate were analyzed quantitatively. The results show that the flow stress depends on both strain rate and temperature. The temperature sensitivity of aluminum alloy increases remarkably with experimental temperature. However, the strain rate sensitivity of the material varies slightly with applied strain rate. Based on experimental results, the parameters of Johnson-Cook constitutive model were also fitted.

Keywords: Flow stress, Strain rate sensitivity, Temperature sensitivity, Constitutive model.

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