| 引用本文: | 郑黎,张士宏,何维均,宋鸿武,Dirk Helm.晶体塑性模型描述多晶体循环加载中的Bauschinger效应[J].材料科学与工艺,2014,22(6):78-84.DOI:10.11951/j.issn.1005-0299.20140614. |
| ZHENG Li,ZHANG Shihong,HE Weijun,SONG Hongwu,Dirk Helm.Description of Bauschinger effect of polycrystalline during cyclic loading by crystal plasticity model[J].Materials Science and Technology,2014,22(6):78-84.DOI:10.11951/j.issn.1005-0299.20140614. |
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| 摘要: |
| 为了研究循环加载过程中织构对多晶材料Baushinger效应的影响,利用经典晶体塑性模型及含随动硬化的晶体塑性模型模拟AA6104铝合金循环加载力学行为.研究了多晶体中晶粒取向差异对材料宏观塑性行为的影响.详细分析了经典晶体塑性模型可描述多晶体循环加载Bauschinger效应机理,定量分析了多晶有限元模型中晶体取向差异对模拟结果的影响.结果表明多晶体中由于晶粒取向差异而造成的晶粒间相互作用力使得多晶体模型宏观卸载时晶粒内的残余应力是产生Bauschinger效应的主要原因,采用含随动硬化的晶体塑性模型能够较好地模拟具有织构的AA6014铝合金的循环加载过程. |
| 关键词: Bauschinger效应 循环加载 晶体塑性模型 数值模拟 随动硬化 |
| DOI：10.11951/j.issn.1005-0299.20140614 |
| 分类号:O345 |
| 基金项目:国家自然科学基金资助项目(51174189). |
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| Description of Bauschinger effect of polycrystalline during cyclic loading by crystal plasticity model |
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ZHENG Li1, ZHANG Shihong1, HE Weijun1,SONG Hongwu1, Dirk Helm2
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(1.Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China; 2.Fraunhofer Institute for Mechanics of Materials IWM, Freiburg 79108, Germany)
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| Abstract: |
| To study the effect of texture on the Bauschinger effect of polycrystal material, the mechanical behavior of AA6014 aluminum alloy under cyclic loading was simulated by the classical crystal plasticity model and crystal plasticity model with kinematic hardening. The relation between macro-mechanic behavior and crystal misorientation in polycrystalline was analyzed. The effect of orientation difference in polycrystalline finite model on the simulation results was quantitatively analyzed. Moreover, the mechanism of classical crystal plasticity model which could describe Bauschinger effect was researched in detail. The result shows that the internal stress caused by the interaction among the crystals is the main factor that leads to the Bauschinger effect in the macro mechanical behavior, and the crystal plasticity model with kinematic hardening could describe the cyclic loading process of AA6014 aluminum alloy very well. |
| Key words: Bauschinger effect cyclic loading crystal plasticity model numerical simulation kinematic hardening |
