• CN：11-2187/TH
  • ISSN：0577-6686
机械工程学报

›› 1992, Vol. 28 ›› Issue (4): 42-46.

• 论文 • 上一篇    下一篇

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刚粘塑性有限元分析中的奇异点对策及其误差评估

孟永钢   

  1. 清华大学摩擦学国家重点实验室
  • 发布日期:1992-07-01

TREATMENT OF SINGULARITY AND ERROR ESTIMATION IN RIGID VISCOPLASTIC FINITE ELEMENT MODELING

Meng Yonggang   

  1. National Tribology Laboratory, Qinghua University
  • Published:1992-07-01

摘要： 提出对包含奇异点的单元进行细分以解决模锻和挤压加工的有限元模拟时经常遇到的奇异点问题的办法，并利用O.C. Zienkiewicz等人的误差评估方法对其有效性作了评价。实际计算结果表明，这种办法对提高有限元模拟的精度、清除奇异点的影响十分有效。

关键词: 挤压, 模锻, 模拟, 塑性, 有限元法

Abstract: In order to overcome difficulties caused by the existence of singular points in simulation of forging and extrusion of metals, a local mesh refinement technique has been developed. The effectiveness of the technique was verified according to the error estimation procedure proposed by Zienkiewicz O C at al. Simulation results of several forming processes shown that this technique is useful to reduce solution error and to decrease the influence of singularity.

Key words: 挤压, 模锻, 模拟, 塑性, 有限元法

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