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정남용(N.Y.Chung),이원(W.Yi),정의섭(E.S.Jeong) 한국자동차공학회 1994 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Recently, the widespread use of dissimilar materials in metal/ceramics, resin/metal, IC package, coating, brazing and soldering which is required bonded strength evaluation at the interface edge of bonded joint in dissimilar materials.<br/> In this paper, the stress distribution and stress singularity of single-lap joint in dissimilar materials were investigated analytically by the bogy's solution and numerically by using boundary element method, The numerically calculated results of the stress singularity by boundary element method were in good agreement with Bogy's analytical solution. On the basis of the obtained results, the effects of dissimilar materials combinations. bonded length and fillet angle at the interface edge are discussed.
경계요소법을 이용한 이종재료 접착.접합재의 응력 및 응력세기계수 해석
이원,정남용,유영철,정의섭,Yi, W.,Chung, N.Y.,Yu, Y.C.,Jeong, E.S. 대한기계학회 1997 大韓機械學會論文集A Vol.21 No.9
Currently it is increasing to use th bonded dissimilar materials in the various field of advanced engineering such as the highly rigid and lighter vehicle, plastic molding LSI package and metal/ceramic bonded joint. In spite of such a wide application of the bonded dissimilar materials, the evaluation method of the bonding strength has not been established yet. Therefore in this paper we analyze the interface crack problem by introducing fracture mechanics parameters as the basic research about estimating of the strength of adhesive joints. The variation of stress intensity factor according to the elastic modulus of adherend and thickness of bonded layer are investigated. Numerical results are based on the results of boundary element analysis of four different type butt joints subjected to uniaxial tension loading.