A two-level parallel algorithm for material nonlinearity problems

Jeeho Lee, Min Seok Kim

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

An efficient two-level domain decomposition parallel algorithm is suggested to solve large-DOF structural problems with nonlinear material models generating unsymmetric tangent matrices, such as a group of plastic-damage material models. The parallel version of the stabilized bi-conjugate gradient method is developed to solve unsymmetric coarse problems iteratively. In the present approach the coarse DOF system is solved parallelly on each processor rather than the whole system equation to minimize the data communication between processors, which is appropriate to maintain the computing performance on a non-supercomputer level cluster system. The performance test results show that the suggested algorithm provides scalability on computing performance and an efficient approach to solve large-DOF nonlinear structural problems on a cluster system.

Original languageEnglish
Pages (from-to)405-416
Number of pages12
JournalStructural Engineering and Mechanics
Volume38
Issue number4
DOIs
StatePublished - 25 May 2011

Keywords

  • Domain decomposition
  • Material nonlinearity
  • Parallel algorithm
  • Plastic-damage model

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