Convergent debonding of films and fibers
Convergent debonding of films and fibers
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DOI：
10.1016/s1359-6454(96)00395-3
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发表时间：
1997-08-01
期刊：
影响因子：
9.4
通讯作者：
Hutchinson, JW
中科院分区：
文献类型：
--
作者：
He, MY;Evans, AG;Hutchinson, JW
附着在基材上的薄膜以及嵌入基体中的纤维的脱粘通常涉及引发、稳态传播以及当脱粘集中在边缘或另一个脱粘时的最终瞬态。本文的重点是瞬态力学。在大多数情况下，会聚脱粘裂纹的特征是能量释放率接近于零，导致裂纹停止而未达到完全脱粘。将参考薄膜界面韧性的测量和陶瓷基复合材料的整体应力应变行为来讨论这种现象的相关性。 (C) 1997 Acta Metallurgica Inc.
Debonding of films attached to substrates as well as fibers embedded in matrices typically involves initiation, steady-state propagation and a final transient as the debond converges on an edge or another debond. The emphasis in this paper is on the mechanics of the transient. Under most circumstances, a converging debond crack is characterized by an energy release rate that approaches zero, causing the crack to arrest without attaining full debonding. The relevance of this phenomenon will be discussed with reference to the measurement of toughness for thin film interfaces and the overall stress-strain behavior of ceramic matrix composites. (C) 1997 Acta Metallurgica Inc.