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PARALLEL COMPUTATIONAL APPROACH FOR THREE-DIMENSIONAL SOLID ELEMENT USING EXTRA SHAPE FUNCTION BASED ON DOMAIN DECOMPOSITION APPROACH

  • JOO, HYUNSHIG (DEPARTMENT OF AEROSPACE ENGINEERING, SEOUL NATIONAL UNIVERSITY) ;
  • GONG, DUHYUN (DEPARTMENT OF AEROSPACE ENGINEERING, SEOUL NATIONAL UNIVERSITY) ;
  • KANG, SEUNG-HOON (DEPARTMENT OF AEROSPACE ENGINEERING, SEOUL NATIONAL UNIVERSITY) ;
  • CHUN, TAEYOUNG (LIGNEX1) ;
  • SHIN, SANG-JOON (DEPARTMENT OF AEROSPACE ENGINEERING, INSTITUTE OF ADVANCED AEROSPACE TECHNOLOGY, SEOUL NATIONAL UNIVERSITY)
  • Received : 2020.06.09
  • Accepted : 2020.06.15
  • Published : 2020.06.25

Abstract

This paper describes the development of a parallel computational algorithm based on the finite element tearing and interconnecting (FETI) method that uses a local Lagrange multiplier. In this approach, structural computational domain is decomposed into non-overlapping sub-domains using local Lagrange multiplier. The local Lagrange multipliers are imposed at interconnecting nodes. 8-node solid element using extra shape function is adopted by using the representative volume element (RVE). The parallel computational algorithm is further established based on message passing interface (MPI). Finally, the present FETI-local approach is implemented on parallel hardware and shows improved performance.

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