锻压技术

基于双轴可控加载实验的应力应变建立薄壁管各向异性屈服准则

英文标题：Establishment of anisotropic yield criterion for thin-walled tubes based on stress and strain of biaxial controllable loading experiment

作者：林艳丽袁杭何祝斌张坤

单位：大连理工大学哈尔滨工业大学

关键词：各向异性屈服准则后继屈服双向应力薄壁管

分类号：TG301

出版年,卷(期):页码：2021,46(4):17-20

摘要：

提出了基于双轴应力状态下的实验应力、应变参量构建薄壁管屈服准则的新方法。以6061-O态挤压铝合金薄壁管为研究对象，分析了管材双轴可控加载胀形实验中薄壁管的应力计算模型，并以此为基础，采用管材双轴可控加载胀形实验系统，获得了多组双轴拉伸应力状态下薄壁管的流动应力-应变曲线。以Hill48模型为例，利用多组双轴拉伸应力状态下薄壁管的流动应力、应变分量构建了薄壁管的屈服准则。结果表明，与传统的构建方法获得的屈服准则相比，利用双轴应力状态下实验应力、应变参量构建的薄壁管屈服准则，可以较为准确地描述双轴应力状态下薄壁管的屈服行为，并可以更加准确地表征其后继屈服行为的演化过程。

A new method of constructing yield criterion for thin-walled tube was proposed based on experimental stress and strain parameters under biaxial stress state. For the 6061-O extruded aluminum alloy thin-walled tube, the stress calculation model of thin-walled tube during bulging experiment under biaxial controlled loading was analyzed, and based on this, several flow stress-strain curves of thin-walled tube under different biaxial tensile stress states were obtained by experiment system of tube bulging under biaxial controlled loading. Taking Hill48 model as an example, the yield criterion of thin-walled tube was established based on these flow stress and strain components of thin-walled tube under biaxial tensile stress states. The results show that compared with the yield criterion obtained by traditional method, the yield behavior of thin-walled tube under biaxial stress states is described accurately by the yield criterion established by the experimental stress and strain components under biaxial stress state, and the evolution process of subsequent yield behavior is more accurately characterized.

基金项目：

国家自然科学基金资助项目（52075075，51575131）；国家重点研发计划资助项目（2017YFB0306300，2017YFB 0304404）；中央高校基本科研业务费资助（DUT20RC(5)031，DUT20RC(5)022）

林艳丽（1982-），女，博士，副教授 E-mail：linyanli@dlut.edu.cn

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