| Citation: | FANG Taotao, LI Xiaoxing, XIAO Ruiet al. Acquisition and analysis of aluminum alloy property in thermal environment based on biaxial tension[J]. Journal of Beijing University of Aeronautics and Astronautics, 2019, 45(6): 1195-1202. doi: 10.13700/j.bh.1001-5965.2018.0625(in Chinese)
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When sheet metal is forming, it usually bears complex loads. However, uniaxial tension test is usually used to obtain material properties, because the material only bears unidirectional load when deforming, which is far from the actual situation. In order to obtain more real material properties under complex loading, mechanical properties and deformation behavior of AA6016 aluminum alloy material under different stretching rates in thermal environment were studied using biaxial tensile test, including optimized design of cruciform specimen, relevant test method and equipment, analysis of test results, etc. The biaxial tensile tests and uniaxial tensile test were carried out under different temperatures of 25℃, 150℃ and 250℃ and different stretching rate of 1:1, 3:2, 2:3, 1:3 and 3:1. The stress-strain relationship, yield criterion and anisotropy at different tension rate ratios and different temperatures were obtained. Further by comparison with the test results, the several typic yield criteria and their suitability were discussed.
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