| 复合材料结构的内部分层及其扩展 |
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| 引用本文： | 潘燕环,陈汝训.复合材料结构的内部分层及其扩展[J].上海力学,1996,17(1):60-68. |
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| 作者姓名： | 潘燕环 陈汝训 |
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| 作者单位： | 同济大学
(潘燕环，嵇醒，王远功，贺鹏飞)，中国航天工业总公司第四研究院(陈汝训) |
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| 摘 要： | 本文用接触观点分析了复合材料壳体结构的内部分层问题，建立了求解摩擦接触问题的有限元迭代格式，并采用释放率判据分析分层裂纹的扩展。分层裂纹前缘采用轴对称奇异单元，并了结构的大变形特性。计算表明，层间裂纹呈Ⅱ型扩展趋势。本文同时还分析了层间摩擦系数的影响，并指出分层将导致壳体结构承载能力显著下降。
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| 关 键 词： | 复合材料 有限元 接触问题 分层 |
INTERNAL DELAMINATION AND ITS PROPAGATION OF COMPOSITE STRUCTURES |
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| Pan Yanhuan Ji Xing Wang Yuangong He Pengfei.INTERNAL DELAMINATION AND ITS PROPAGATION OF COMPOSITE STRUCTURES[J].Chinese Quarterly Mechanics,1996,17(1):60-68. |
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| Authors: | Pan Yanhuan Ji Xing Wang Yuangong He Pengfei |
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| Abstract: | In this paper, the behavior of composite structures with internal delamination is analyzed in the view-point of contact. Numerical iteration scheme using finite element method is established to solve the frictional contact problem. Axisymmetric singular finite element is used near the front eage of delamination cracks. Finite deformation behavior of the structure is considered. The results conclude in that the interlaminar crack exhibits as a mode E crack and delamination will lead to a remarkable reduction of load-carrying capability of the structure. |
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| Keywords: | Composite materials Finite element methods Contact problem Delamination |
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