| 考虑内部损伤影响的层合板最终强度预测 |
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| 引用本文： | 陈建桥, 彭文杰, 魏俊红, 顾明凯. 考虑内部损伤影响的层合板最终强度预测[J]. 固体力学学报, 2009, 30(1): 1-7. |
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| 作者姓名： | 陈建桥 彭文杰 魏俊红 顾明凯 |
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| 作者单位： | 华中科技大学力学系,武汉,430074; 华中科技大学力学系,武汉,430074; 华中科技大学力学系,武汉,430074; 宁波检验检疫轻工中心,宁波,315000 |
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| 基金项目： | 国家自然科学基金，高等学校博士学科点专项科研基金 |
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| 摘 要： | 层合板强度分析若只考虑面内失效而忽略自由边界处的分层失效,往往会高估强度值,得不到合理的预测结果.该文提出了一种层合板强度的数值分析方法,综合考虑了层合板的面内失效(基体失效和纤维断裂)以及层间分层失效.采用有限元方法对层合板进行结构分析得到板的应力响应,结合面内失效判据和分层失效判据对层合板各个单层进行失效判断,采用刚度退化和逐步失效方法求得层合板的最终失效强度.与以往方法相比,该文模型和方法考虑的因素更全面.数值算例表明该方法预测得到的最终失效载荷和分层起始载荷和已有文献实验结果一致.
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| 关 键 词： | 层合板 自由边界 分层失效 逐步失效 最终强度 |
STUDY ON THE LAMINATE'S STRENGTH BY ACCOUNTING FOR INTERNAL DAMAGE GROWTH |
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| STUDY ON THE LAMINATE'S STRENGTH BY ACCOUNTING FOR INTERNAL DAMAGE GROWTH[J]. Chinese Journal of Solid Mechanics, 2009, 30(1): 1-7. |
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| Authors: | Jianqiao Chen Wenjie Peng Junhong Wei Mingkai Gu |
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| Affiliation: | 1 Huazhong University of Science and Technology;Department of Mechanics;Wuhan;430074;2 Light Industry Inspection Center of Ningbo Entry-Exit Inspection & Quarantine Bureau;Ningbo;315000 |
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| Abstract: | Neglecting delamination failure mode owing to free-edge effect, the failure strength of a laminate will be overestimated under the traditional laminate strength analysis which considers only in-plane failure. In this paper, a numerical method considering both in-plane failure and delamination failure was proposed to predict the ultimate strength of laminates. For each ply, three major failure modes are considered: matrix failure, fiber breakage and delamination. Finite element method is used to obtain the i... |
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| Keywords: | laminates free edge delamination failure progressive failure ultimate strength |
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