Finite element simulation of fiber pullout in fiber reinforced ceramic matrix composites
Finite element simulation of fiber pullout in fiber reinforced ceramic matrix composites
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DOI：
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发表时间：
2007-08
影响因子：
0.7
通讯作者：
Liu Chunjun;Z. Yue;Zhang Dahai;Li Zhongping
中科院分区：
文献类型：
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作者：
Liu Chunjun;Z. Yue;Zhang Dahai;Li Zhongping
采用内聚区模型描述复合材料界面的分离特性。采用有限元数值方法模拟了陶瓷基复合材料纤维拉拔的细观损伤和断裂过程，并计算了拉拔过程的载荷位移曲线。研究了界面结合强度、纤维嵌入长度和热膨胀系数对纤维拉拔过程的影响。结果表明，该模型能够很好地解释纤维拉拔断裂过程。最大拉拔力和承载能力随着上述因素的增加而增加。纤维与热膨胀系数的不一致直接影响拉拔力。
The separation characteristics of composite interface were described by adopting cohesive zone model. The meso-demage and fracture process of fiber pullout of the ceramic matrix composites were stimulated by means of finite element numerical method and the load displacement curve of the pullout process were also calculated. The effects of the interfacial bond strength, the embedded length of fiber and the thermal expansion coefficient on the fiber pullout process were studied. The results showed that the model could explain the fracture process of fiber pullout well. The maximal pullout force and the load carrying capacity increased with the above factors increasing. The disagreement between fiber and thermal expansion coefficient affect the pullout force directly.