Dahmani F, Lambropoulos J C, Schmid A W, Papernov S, Burns S J
University of Rochester, 250 East River Road, Rochester, New York 14623-1299, USA.
Appl Opt. 1999 Nov 20;38(33):6892-903. doi: 10.1364/ao.38.006892.
Results of experiments on stress-inhibited laser-driven crack growth and stress-delayed laser-damage initiation thresholds in fused silica, borosilicate glass (BK-7), and cleaved bulk silica are presented. A numerical model is developed to explain the crack arrest in fused silica. Good agreement is obtained between the model and a finite-element code. The crack arrest is demonstrated to be the result of the breaking of a hoop-stress symmetry that is responsible for crack propagation in fused silica.
本文展示了在熔石英、硼硅酸盐玻璃（BK-7）和劈开的块状石英中，关于应力抑制激光驱动裂纹扩展以及应力延迟激光损伤起始阈值的实验结果。开发了一个数值模型来解释熔石英中的裂纹止裂现象。该模型与有限元代码之间取得了良好的一致性。结果表明，裂纹止裂是由于熔石英中负责裂纹扩展的环向应力对称性被破坏所致。
