低速衝撃を受けるガラス板の数値解析モデル

抄録

To protect people from injury in case of natural disasters, an understanding of the impact response of window glass plates is important. In this study, a numerical simulation model of a float glass plate that fractured under a low-velocity impact was investigated. Two types of material models were applied to the float glass: the Johnson–Holmquist model and the elastic model with tensile pressure failure. The fracture mode of the glass plate in the experiment was not reproduced in the simulation with the Johnson–Holmquist model at an impact velocity of 4.43 m/s. This result implied the limitation of applying the damage model to low-velocity impact for simulating the fracture mode of a glass plate. In the material model with elastic as the constitutive law and tensile pressure failure as the failure model, the fracture mode showed characteristics of the bending fracture mode that was observed in the experiment. The elastic model could reproduce the glass plate response in the low-velocity impact since the influence of inertia was small in the phenomenon.