Growth and coalescence of small crack on glass surface immersed in water

Daoxin Liu, Minxu Lu, Zexia He, Ji Qi, Xiulin Zheng

科研成果: 期刊稿件文章同行评审

摘要

Not only the coalescence of two coplanar cracks and the growth of single crack but also the coalescence of three coplanar and two noncoplanar cracks were investigated here by the method of increasing K1. The glass samples used were 3.0mm in thickness, 20mm in width, and their composition (wt-%) were SiO2 71.6, Al2O3 1.0, CaO9.8, MgO4.3, Na2O13.3, SO30.2. The results show: (1) For one, two, three coplanar or noncoplanar cracks, it is always true that crack propagation rate da/dt first drops to a low point and then increases with increasing K. (2) There are important differences between coplanar and noncoplanar cracks. For noncoplanar cracks, not only stress superposition but also stress relaxation can occur.

源语言英语
页(从-至)303-310
页数8
期刊Xibei Gongye Daxue Xuebao/Journal of Northwestern Polytechnical University
10
3
出版状态已出版 - 7月 1992

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