10410 単軸引張状態における金属箔材の自由表面あれ進展挙動と破壊メカニズムに関する一考察(OS1-2【実験力学とその応用(2)】)  [in Japanese] 10410 A Consideration on Free Surface Roughening and Fracture Mechanism of Metal Foils Under Uni-axial Tensile State  [in Japanese]

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Abstract

Metal foils indicates low level fracture strain compared with sheet metal. In this study, the free surface roughening is focused on to clarify the mechanism of ductile fracture for metal foils, since the ratio of surface roughness to thickness become larger compared with sheet metal. Materials used are pure copper, pure aluminum and pure titanium with thickness of 0.05, 0.1, 0.3 and 0.5mm respectively. Free surface roughening and ductile fracture behavior are observed under uni-axial tensile state. As a result, the surface roughening to thickness of metal foils with thickness of 0.05, 0.1mm was larger than that of sheet metals with thickness of 0.3, 0.5mm. In addition, an inhomogeneous FE material modeling is proposed for prediction of surface roughening and necking behavior. In this model, grain size and variation in flow stress of each grain as aspect of mesoscopic material information were considered for modeling of material inhomogeneity. The necking behavior of metal foil can be expressed by inhomogeneous FE material modeling. Therefore, it can be concerned that surface roughening to thickness affects the fracture of metal foil.

Journal

  • The Proceedings of Conference of Kanto Branch

    The Proceedings of Conference of Kanto Branch 2013.19(0), 61-62, 2013

    The Japan Society of Mechanical Engineers

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