Open Access

ARTICLE

Coupled Analysis of Independently Modeled Finite Element Substructures by Moving Least Squares Displacement Welding Technique

Jin Yeon Cho¹, Jae Mo An², You Me Song¹, Seungsoo Lee¹, Dong Whan Choi¹

1 Department of Aerospace Engineering, INHA University, Korea
2 Department of Aerospace Engineering, INHA University, Korea Currently, Korea Aerospace Research Institute

Computer Modeling in Engineering & Sciences 2005, 9(1), 1-18. https://doi.org/10.3970/cmes.2005.009.001

Abstract

A displacement welding technique is proposed to carry out coupled analysis of the integrated whole model which consists of independently modeled finite element substructures. In the proposed method, the incompatible displacement fields in the interfaces of independently modeled substructures are directly welded together through a blended function that is newly defined in the transient region of mismatching interface. To construct the blended function, the moving least squares function, which does not require well-defined nodal connectivity, is utilized along with the original finite element shape function. The meshless character of the moving least squares function makes it possible to efficiently handle the mismatching interfaces of independently modeled finite element substructures. To prove the validity of the proposed method, the patch tests and convergence tests are carried out for various mismatching models. To assess the performance of the proposed welding technique, several numerical examples are worked out including beam type problem, plate with circular hole, and L-shaped beam type problem. As a practical application, example of three dimensional coupled analysis of independently modeled substructures is presented.

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