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EXPERINENTAL ANALYSIS FOR EDGE STRESS AND CRACKING FAILURE OF BIMATERIAL BEAM

Kang Yilan; Jia Youqan; K. H. Larermann(Tianjin University,Tianjin,300072)(Wuppertal Uni.Germany)  
In this paper, the method Of moire Intefference is used to measure the displacements of bimaterial beam under bending load. The stress and strain near the edge of interface (corner stress)is investigated by localized hybrid method. It is shown that the distribution of strains and stresses are compliated in corner region and the tensile sires which has sudden change in beam's cross-section,has significant influence on the strength of bimaterial berm. Under maximal tensile stress cracking failure on surface Of substrate material may be appeared.
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