| 材料不均匀层对垂直裂纹的作用 |
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| 引用本文： | 王惠军,杨卫.材料不均匀层对垂直裂纹的作用[J].复合材料学报,1996,13(1):91-96. |
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| 作者姓名： | 王惠军 杨卫 |
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| 作者单位： | 清华大学工程力学系, 北京 100084 |
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| 摘 要： | 界面层(或界面相)断裂行为是复合材料细观力学的一个重要问题。本文研究裂纹垂直侵入双材料之间刚度性质呈单调变化的界面层的断裂问题。近似分析与大规模有限元计算均表明:当裂纹从软相一侧跨越界面层时,裂尖应力强度因子不断上升;当裂纹从硬相一侧跨越界面层时,裂尖应力强度因子不断下降。
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| 关 键 词： | 界面层 断裂 垂直侵入 |
| 收稿时间： | 1994-08-04 |
| 修稿时间： | 1994-12-06 |
A VERTICAL CRACK PENETRATING AN INHOMOGENEOUS MATERIAL INTERLAYER |
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| Wang Huijun, Yang Wei.A VERTICAL CRACK PENETRATING AN INHOMOGENEOUS MATERIAL INTERLAYER[J].Acta Materiae Compositae Sinica,1996,13(1):91-96. |
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| Authors: | Wang Huijun Yang Wei |
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| Affiliation: | Department of Engineering Mechanics, Tsinghua University, Beijing 100084 |
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| Abstract: | Interlayer(or interphase) fracture constitutes an important issue of the micromechanics of composite materials,The present paper studies the fracture behavior of a crack penetrating vertically to an interlayer where the stiffness varies monotonically from one material phase to another material phase.Analytical estimate and full-scaled FEM calculation both indicate that the crack-tip stress intensity factor increases when a crack penetrates the interlayer from the soft material side,and decreases when a crack penetrates the interlayer from the stiff material side of the bimaterial. |
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| Keywords: | interlayer fracture vertical penetration |
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