不変量破損則を用いた接着構造強度最大化のための接着層形状最適化

抄録

This research deals with the adhesive interface design of multi-material structures under multiaxial stress states using by shape optimization. The strength of the adhesive structure is evaluated with failure function that consists of stress invariants and material parameters dependent on the material properties of adhesives. The square sum of the failure function in the adhesive layer is defined as objective function. As an analysis model, uniform tensile force and torsional moment that yield tensile and shear stress in the adhesive layer were applied to a thin-walled cylinder model. Shape optimization based on H¹ gradient method were performed in the three different loading conditions of the analysis model that allowed different ratio of tensile and shear stress to be applied in the adhesive layer. The obtained results show that the optimal adhesive interface shapes with this method are reasonable, thus proposed method would contribute to design of the adhesive structures under multiaxial stress states.