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A Study on the Effect of Cohesive Laws on Finite Element Analysis of Crack Propagation Using Cohesive Elements

응집 요소를 사용한 균열 진전 유한요소 해석에서 응집 법칙의 영향에 대한 연구

  • Seo, Hyeong-Seok (Dept. of Mechanical & Automotive Engineering, Seoul Nat'l Univ. of Sci. & Tech.) ;
  • Baek, Hyung-Chan (Dept. of Mechanical & Automotive Engineering, Seoul Nat'l Univ. of Sci. & Tech.) ;
  • Kim, Hyun-Gyu (Dept. of Mechanical & Automotive Engineering, Seoul Nat'l Univ. of Sci. & Tech.)
  • 서형석 (서울과학기술대학교 기계자동차공학과) ;
  • 백형찬 (서울과학기술대학교 기계자동차공학과) ;
  • 김현규 (서울과학기술대학교 기계자동차공학과)
  • Received : 2013.12.26
  • Accepted : 2014.02.26
  • Published : 2014.04.01

Abstract

In this paper, the effect of cohesive laws on the finite element analysis of crack propagation using cohesive elements is investigated through three-point bending and double cantilever beam problems. The cohesive elements are implemented into ABAQUS/Standard user subroutines(UEL), and the shape of cohesive law is varied by changing parameters in polynomial functions of cohesive traction-separation relations. In particular, crack propagation behaviors are studied by comparing load-displacement curves of the analysis models which have different shapes of cohesive laws with the same values of fracture energy and cohesive strength. Furthermore, the influence of the element size on crack propagation is discussed in this study.

Keywords

Finite Element Method;Cohesive Elements;Cohesive Laws;Crack Propagation Analysis

Acknowledgement

Supported by : 서울과학기술대학교

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