| 一种适用于率相关晶体塑性模型的准隐式积分算法 |
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| 引用本文： | 章海明,董湘怀. 一种适用于率相关晶体塑性模型的准隐式积分算法[J]. 精密成形工程, 2011, 3(6): 1-5,65 |
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| 作者姓名： | 章海明 董湘怀 |
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| 作者单位： | 上海交通大学塑性成形与装备技术研究院,上海,200030 |
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| 基金项目： | 国家自然科学基金(50821003,50835002,50975174); 高等学校博士学科点专项科研基金(20100073110044) |
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| 摘 要： | 参考经典的切线系数法,采用向前梯度法对修正的超弹性晶体塑性模型进行本构方程积分,提出了一种新的准隐式积分算法。该算法采用基于中间构型的超弹性晶体塑性模型,无需更新晶粒取向相关的状态变量;采用修正的超弹性框架,无需进行由Green-Naghdi材料共旋引起的旋转变换。这种准隐式积分算法兼有超弹性模型和切线系数法的优点。通...
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| 关 键 词： | 晶体塑性模型 准隐式积分算法 显式有限元 板料成形 |
| 收稿时间： | 2011-10-10 |
| 修稿时间： | 2011-11-10 |
An Semi-implicit Integration Scheme for Rate Dependent Crystal Plasticity |
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| ZHANG Hai-ming and DONG Xiang-huai. An Semi-implicit Integration Scheme for Rate Dependent Crystal Plasticity[J]. Journal of Netshape Forming Engineering, 2011, 3(6): 1-5,65 |
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| Authors: | ZHANG Hai-ming and DONG Xiang-huai |
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| Affiliation: | ZHANG Hai-ming,DONG Xiang-huai (Forming Technology & Equipment,Shanghai Jiao Tong University,Shanghai 200030,China) |
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| Abstract: | A semi-implicit integration scheme for rate dependent crystal plasticity is proposed in this paper. The algorithm is similar to the tangent modulus method. A modified hyperelastic frame is adopted to circumvent the troublesome incremental objectivity encountered by the hypoelastic crystal plasticity models, especially when Green-Naghdi material co-rotational coordinate system (MCCS) is used, e.g. in many commercial explicit FEM software. The algorithm combines the advantages of the tangent modulus method an... |
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| Keywords: | crystal plasticity semi-implicit integration scheme explicit FEM sheet metal forming |
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