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Cohesive zone model을 이용한 접착제 물성평가 : 모드 Ⅰ
이찬주(C.J. Lee),이상곤(S.K. Lee),고대철(D.C. Ko),S. Marzi,박근환(G.H. Park),김병민(B.M. Kim) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.5
Fracture models and criteria of adhesive with two parameters, namely G<SUB>C</SUB> and σ<SUB>max</SUB>, have been developed to describe the fracture process of adhesive joints. Cohesive zone model(CZM) is a representative two parameter failure criteria approach. In CZM, σ<SUB>max</SUB> is a critical, limiting maximum value of the stress in the damage zone ahead of the crack and is assumed to have some physical significance in adhesive failure. Based on CZM and finite element analysis method, the relationship between fracture load and adhesive properties, as G<SUB>IC</SUB> and(σ<SUB>max</SUB>)<SUB>I</SUB>, was investigated in adhesively bonded joint tensile test and T-peel test. The two parameters in tensile mode loading were evaluated by using the relationship. The value of G<SUB>IC</SUB> evaluated by proposed method showed close agreement with analytical solution for tapered double cantilever beam(TDCB) test which proposed in an ASTM standard.