车用7075铝合金板的各向异性和拉压不对称屈服行为  

Anisotropic and Tension-Compression Asymmetric Yield Behavior of 7075 Aluminum Alloy Sheet for Vehicles

作　　者：薛浙瀛[1] 方许铖 杨宁 娄燕山 XUE Zheying;FANG Xucheng;YANG Ning;LOU Yanshan(Zhejiang Agricultural Business College,Shaoxing 312000,China;School of Mechanical Engineering,Xi'an Jiaotong University,Xi'an 710049,China)

机构地区：[1]浙江农业商贸职业学院,绍兴312000 [2]西安交通大学机械学院,西安710049

出　　处：《机械工程材料》2024年第7期108-113,共6页Materials For Mechanical Engineering

基　　金：国家自然科学基金面上资助项目(52075423);国家自然科学基金“叶启孙”科学基金资助项目(U2141214);浙江省教育厅一般课题项目(KY201905)。

摘　　要：对退火态7075铝合金板进行了不同加载方向(与轧制方向呈0°,15°,30°,45°,60°,75°,90°)下的单轴拉伸与单轴压缩试验以及液压胀形试验,研究了屈服行为;通过耦合静水压力项修正了Yld2004-18p各向异性屈服函数,对铝合金板的屈服强度进行预测,并与试验结果进行了对比。结果表明:不同加载方向或加载方式下,试验合金板的屈服强度不同,合金板具有显著的屈服各向异性和拉压不对称性;修正后的非对称各向异性屈服函数预测的屈服强度和试验值之间的总相对误差仅有0.0005,可以准确描述7075铝合金板各向异性和拉压不对称屈服行为。Uniaxial tensile and uniaxial compression under different loading directions(angle with rolling direction of 0°,15°,30°,45°,60°,75°,90°)and hydraulic expansion tests were carried out on annealed 7075 aluminum alloy sheet.The yield behavior was studied.The Yld2004-18p anisotropic yield function was modified by coupling hydrostatic pressure term,and the yield strength of aluminum alloy sheet was predicated by using the modified function.The predicted results were compared with the experimental results.The results show that the yield strength of the test alloy sheet was different under different loading directions or loading modes.The alloy sheet had significant anisotropic and tension-compression asymmetric yield behavior.The total relative error between the yield strength predicted by the modified asymmetric and anisotropic yield function and the test value was only 0.0005,indicating that the modified function could accurately describe the anisotropic and tension-compression asymmetric yield behavior.

关 键 词：铝合金 各向异性 拉伸-压缩不对称性 屈服函数 

分 类 号：TS206[轻工技术与工程—食品科学]