| 复合材料层板层间剥离研究的有限元——虚裂纹扩展法 |
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| 引用本文： | 崔德渝,张行.复合材料层板层间剥离研究的有限元——虚裂纹扩展法[J].复合材料学报,1988,5(4):28. |
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| 作者姓名： | 崔德渝 张行 |
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| 作者单位： | 北京航空学院飞行器设计和应用力学系 |
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| 摘 要： | 本文采用准三维等参元及虚裂纹扩展法分析了在各种层合板参数下层间裂纹(层间剥离)扩展的能量释放率值.计算表明,此方法提供了一个有效地预示剥离形成和扩展规律的途径.从理论与实验结果的对照可以看出,当裂纹两侧铺层的纤维取向与裂纹前乡的夹角一定时,临界能量释放率可以视作控制层间剥离的材料常数.
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| 收稿时间： | 1987-07-26 |
A FINITE ELEMENT-VIRTUAL CRACK EXTENSION METHOD FOR INVESTIGATING THE DELAMINATION OF COMPOSITE LAMINATE |
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| Cui Deyu,Zhang Xing.A FINITE ELEMENT-VIRTUAL CRACK EXTENSION METHOD FOR INVESTIGATING THE DELAMINATION OF COMPOSITE LAMINATE[J].Acta Materiae Compositae Sinica,1988,5(4):28. |
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| Authors: | Cui Deyu Zhang Xing |
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| Affiliation: | Department of Flight Vehicle Design and Applied Mechanics Beijing Institute of Aeronautics and Astronautics, Beijing, China |
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| Abstract: | A quasi-3D finite element and Virtzual Crack Extension Method of Hellen (1) are used to investigate the energy release rate for delaminated composite with various laminate parameters. The numerical results have shown that this method presents an effective approach ti predict the initistion and propagation mechanism of delamination.Ccrnparing the theoretical results with experimental evidence, it can be seen that for a given angle between the crack front and the fiber orientation of lateral delaminatod layers the eritical energy release rate could be considered as the material behavior for controlling the delamination growth of composite laminate. |
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