CRACKING OF BRITTLE FILMS ON ELASTIC SUBSTRATES
CRACKING OF BRITTLE FILMS ON ELASTIC SUBSTRATES
复制标题
DOI：
10.1016/0956-7151(92)90429-i
复制
发表时间：
1992-06-01
期刊：
影响因子：
--
通讯作者：
GUPTA, A
中科院分区：
文献类型：
--
作者：
THOULESS, MD;OLSSON, E;GUPTA, A
本文分析了弹性基底上脆性薄膜中裂纹间距与薄膜中应力、薄膜厚度和断裂韧性之间的关系。这种分析不同于早期的一个作者，它认为一个连续的，而不是一个协调的，裂纹的传播的影响，并预测一个更大的裂纹间距。实验结果证实了本分析的有效性从一个模型系统组成的外延PrBa 2Cu 3 O 7-x薄膜SrTiO 3衬底。实验观察到的裂纹间距和膜厚之间的关系与理论非常一致。
An analysis is presented that relates the crack spacing in a brittle film on an elastic substrate to the stress in the film, its thickness and fracture toughness. This analysis differs from an earlier one presented by one of the authors in that it considers the effect of a sequential, rather than a concerted, propagation of cracks, and predicts a larger crack spacing. The validity of the present analysis was confirmed by experimental results from a model system consisting of epitaxial PrBa2Cu3O7-x films on SrTiO3 substrates. The experimentally observed relationship between the crack spacing and the film thickness was in excellent agreement with the theory.