段庆林
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弹塑性大变形分析的一致性高阶无单元伽辽金法
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Indexed by:Journal Papers

Date of Publication:2019-08-15

Journal:计算力学学报

Included Journals:PKU

Volume:36

Issue:4

Page Number:471-476

ISSN No.:1007-4708

Key Words:无网格/无单元;弹塑性;大变形;数值积分;非线性

Abstract:采用无单元伽辽金法求解弹塑性大变形问题.充分利用无单元法易于建立高阶近似函数的优点,位移采用二阶移动最小二乘近似.在更新拉格朗日方法的框架下,通过对控制方程弱形式的线性化建立了内力率的表达式,并区分为材料和几何两部分.采用Hughes-Winget算法更新应力,建立了New ton-Raphson迭代求解所需的一致切线刚度阵.刚度阵的数值积分采用近来针对小变形分析建立的二阶一致三点积分格式QC3 (Quadratically Consistent 3-point integration scheme).数值结果证明了本文方法分析弹塑性大变形问题的有效性和优越性.

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Gender:Male

Alma Mater:大连理工大学

Degree:Doctoral Degree

School/Department:力学与航空航天学院

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