›› 2015, Vol. 24 ›› Issue (1): 10204-010204.doi: 10.1088/1674-1056/24/1/010204

• GENERAL • 上一篇    下一篇

Hybrid natural element method for viscoelasticity problems

周延凯a, 马永其a b, 董轶c, 冯伟a   

  1. a Shanghai Institute of Applied Mathematics and Mechanics, Shanghai University, Shanghai 200072, China;
    b Department of Mechanics, Shanghai University, Shanghai 200444, China;
    c Shanghai Industrial Urban Development Group Limited, Shanghai 200030, China
  • 收稿日期:2014-08-24 修回日期:2014-09-12 出版日期:2015-01-05 发布日期:2015-01-05
  • 基金资助:
    Project supported by the Natural Science Foundation of Shanghai, China (Grant No. 13ZR1415900).

Hybrid natural element method for viscoelasticity problems

Zhou Yan-Kai (周延凯)a, Ma Yong-Qi (马永其)a b, Dong Yi (董轶)c, Feng Wei (冯伟)a   

  1. a Shanghai Institute of Applied Mathematics and Mechanics, Shanghai University, Shanghai 200072, China;
    b Department of Mechanics, Shanghai University, Shanghai 200444, China;
    c Shanghai Industrial Urban Development Group Limited, Shanghai 200030, China
  • Received:2014-08-24 Revised:2014-09-12 Online:2015-01-05 Published:2015-01-05
  • Contact: Ma Yong-Qi E-mail:mayq@staff.shu.edu.cn
  • Supported by:
    Project supported by the Natural Science Foundation of Shanghai, China (Grant No. 13ZR1415900).

摘要: A hybrid natural element method (HNEM) for two-dimensional viscoelasticity problems under the creep condition is proposed. The natural neighbor interpolation is used as the test function, and the discrete equation system of the HNEM for viscoelasticity problems is obtained using the Hellinger-Reissner variational principle. In contrast to the natural element method (NEM), the HNEM can directly obtain the nodal stresses, which have higher precisions than those obtained using the moving least-square (MLS) approximation. Some numerical examples are given to demonstrate the validity and superiority of this HNEM.

关键词: hybrid natural element method, viscoelasticity, Hellinger-Reissner variational principle, meshless method

Abstract: A hybrid natural element method (HNEM) for two-dimensional viscoelasticity problems under the creep condition is proposed. The natural neighbor interpolation is used as the test function, and the discrete equation system of the HNEM for viscoelasticity problems is obtained using the Hellinger-Reissner variational principle. In contrast to the natural element method (NEM), the HNEM can directly obtain the nodal stresses, which have higher precisions than those obtained using the moving least-square (MLS) approximation. Some numerical examples are given to demonstrate the validity and superiority of this HNEM.

Key words: hybrid natural element method, viscoelasticity, Hellinger-Reissner variational principle, meshless method

中图分类号:  (Numerical simulation; solution of equations)

  • 02.60.Cb
02.60.Lj (Ordinary and partial differential equations; boundary value problems) 46.35.+z (Viscoelasticity, plasticity, viscoplasticity)