【摘要】 本文用高速摄影方法研究了垂直引上窗玻璃、物理钢化玻璃和化学钢化玻璃在冲击负荷下断裂的形态及裂纹的扩展。结果表明三种玻璃冲击破裂时,首先产生径向裂纹并向外扩展,化学钢化玻璃及物理钢化玻璃还产生周向环状裂纹。物理钢化玻璃裂纹呈密集网状,窗玻璃呈树枝状,化学钢化玻璃介于两者之间。物理钢化玻璃裂纹扩展速度最快,在1000m/s以上。本文还讨论了裂纹扩展速度和冲击断裂能之间关系。更多还原

【Abstract】 The fracture features and propagation of cracks of Fourcault window glass, physically tempered glass and chemically tempered glass under impact loading were studied by means of high speed camera. Radial cracks propagate outward when impact fracture occurs in all these three kinds of glasses, and additional circular cracks also appear in chemically tempered glass and physically tempered glass besides the radial cracks. Crack in physically tempered glass look like a densely knitted net, these in window glass look like tree branches, while the shape of cracks in chemically tempered glass lies between that of cracks in physically tempered glass and window glass. The propagation velocity of cracks of physically tempered glass is the largest, above 1000m/s. Relationship between propagation velocity of cracks and impact fracture energy is also discussedin the paper.更多还原