A Continuum Interface Debonding Model and Application to Matrix Cracking of Composites
A Continuum Interface Debonding Model and Application to Matrix Cracking of Composites
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连续界面脱粘模型及其在复合材料基体开裂中的应用
DOI：
10.1299/jsmea1993.39.4_496
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发表时间：
1996
期刊：
影响因子：
--
通讯作者：
K. Kishimoto
中科院分区：
文献类型：
--
作者：
F. Ma;K. Kishimoto
基于热力学内变量理论，建立了界面牵引力与界面分离相结合的连续介质界面本构模型。引入了界面损伤变量，并推导了表征界面脱粘引起的界面刚性退化的评价方程。将所建立的本构模型应用于复合材料的纤维拔出和基体裂纹的桥接。得到了界面剪应力分布、纤维从基体上的拉应力和纤维桥联的小裂纹尖端应力强度因子的相对简单的封闭形式公式。讨论了评价方程中的界面参数对界面剪应力分布和纤维拉应力的影响。
Based on the internal variable theory of thermodynamics, a continuum interface constitutive model relating interface traction with interface separation was developed. An interface damage variable was introduced, and an evaluation equation was derived to characterize the degradation of interfacial rigidity with interface debonding. The present constitutive model was applied to fiber pullout from the matrix, and bridging matrix cracking of composites. Relatively simple closed form formulas were obtained for shear stress distribution along the interface, pulling stress of fiber from the matrix, and stress intensity factor of the small matrix crack tip with fiber bridging. The effects of interface parameters involved in the evaluation equation on interface shear stress distribution, and pulling stress of fiber were also discussed.