任意のモードIIとIIIの混合モード下での剥離進展解析に有効な結合力要素モデル化

概要

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Novel cohesive element which can deal with non-self-similar crack growth under mixed-mode II and III failure condition is proposed. The local coordinate system based on the crack front direction is determined in terms of relative displacement of the cohesive elements. Traction-relative displacement relation of the element is determined as a function of mode components calculated on the local coordinate system. This formulation allows us to simulate delamination growth when the non-self-similar crack growth occurs and the fracture toughness depends on the mode ratio. The numerical examples revealed that the crack growth strongly depends on its history when the mode II and III fracture toughness is different and the present formulation is valid even for the simulation of such history dependent crack growth.
2010-05-25