An efficient load identification for viscoplastic materials by an inverse meshfree analysis

Z. Kazemi, M. R. Hematiyan, Y. C. Shiah

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Despite the extensive study of direct viscoplastic analysis in the past, its inverse study has remained very scarce indeed. In this paper, an inverse method based on an improved version of the meshfree radial point interpolation method (RPIM) is presented for load identification in 2D viscoplasticity. The unknown load, varying with respect to space and time, is determined using measured strains at several sampling points on boundary or within the domain of the problem. The inverse analysis employs the well-known Tikhonov regularization and damped Gauss–Newton methods. Proper location and arrangement of sampling points for more accurate identification of unknowns is investigated too. To demonstrate the feasibility of the proposed method, a comprehensive numerical example in different conditions is presented. Furthermore, the effects of some important parameters, such as the number of sampling points and measurement errors, on the stability and accuracy of the solution are also studied.

Original languageEnglish
Pages (from-to)303-312
Number of pages10
JournalInternational Journal of Mechanical Sciences
Volume136
DOIs
Publication statusPublished - 2018 Feb

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Fingerprint Dive into the research topics of 'An efficient load identification for viscoplastic materials by an inverse meshfree analysis'. Together they form a unique fingerprint.

  • Cite this