FE ANALYSES UTILIZED HYPERELASTIC MATERIAL PARAMETERS FOR STRESS DESTRIBUTION OCCURRED INSIDE RUBBER BEARINGS IN SHEAR DEFORMATION ACTION UNDER ULTIMATE STATE

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  • せん断変形作用における極限状態のゴム製支承の応力分布に関する考察

Abstract

<p> When designing a rubber bearing that has a structure in which rubber and steel plates are bonded together by adhesive, it is extremely important to prevent adhesive delamination from occurring before the rubber breaks. The road bridge bearing guidelines require that the 90° peel strength be 7 N/mm or greater. However, the actual internal stress state of rubber bearings under horizontal displacement has not yet been clarified, and differs from the stress state obtained from the 90° peel test. Therefore it seems that there are potential problem of not knowing the physical meanings of the limit values of the 90° peel test.</p><p> In this paper, the internal stress state of four types of rubber bearings, a 90° peel strength test specimen, and a single lap shear test specimen were subjected to FEM analysis that took into account hyperelastic material parameters and adhesive layers. Better evaluation method of adhesive delamination was considered based on the results that internal stress state of each model was clarified and compared.</p>

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