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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.
피착체의 두께가 다른 단순겹치기 접착이음에 대한 응력 특이성 파라미터의 해석
이원(W.Yi),정의섭(E.S.Jeong),유영철(Y.C.Yu) 한국자동차공학회 1995 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1995 No.6_2
Adhesive bonded joints are being used in many structures in view of weight reduction. Therefore it is important to evaluate the bonding strength and the stress singularity at the interface edge. In this paper the boundary element results for the single lap joints having different thickness of adherend are presented. On the basis of this results the effects of the bonding length and adherend thickness on the joint strength are estimated by using the stress singularity parameters.<br/>
유영철(Y.C.Yu),조형문(H.M.Cho),윤인식(I.S.Yun),이원(W.Yi) 한국자동차공학회 1997 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1997 No.6_2
In the present work, we conducted static tensile test to examine the influence of void size and void location upon the adhesive strength of single lap joints with voids in the adhesive layer. Larger void length or nearer void location from the ends of the overlap decrease the ultimate tensile load. AQ finite element analysis results was proposed to estimate the interface stress at the edge of void. The strength of adhesive joint with a void was well characterized by the shear stress at the edge of void.<br/>