| 两类有脱层损伤层合圆柱壳的半解析法研究 |
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| 引用本文： | 张银波, 但敏. 两类有脱层损伤层合圆柱壳的半解析法研究[J]. 力学与实践, 2013, 35(5): 47-53,46. doi: 10.6052/1000-0879-13-141 |
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| 作者姓名： | 张银波 但敏 |
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| 作者单位： | 中国民航大学航空工程学院, 天津300300 |
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| 基金项目： | 中国民航大学校内科研基金(06kym12)资助项目. |
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| 摘 要： | 为了研究层合壳脱层,本文首先建立了柱坐标系下Hamilton 正则方程的8 节点等参元列式;然后分别采用了"先分后合" 模型和"弱粘接" 模型对开口壳的脱层损伤进行了模拟;通过利用层间的力学关系建立了整个壳的求解方程;最后分别从粘接完好和脱层两类情况对开口壳进行研究,并计算脱层前缘裂纹扩展的能量释放率. 数值实例的分析结果表明环向脱层受外载荷影响大于轴向脱层外载荷影响,脱层深度对两类脱层模型影响较大.
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| 关 键 词： | Hamilton正则方程 8节点等参元 圆柱壳 脱层 |
| 收稿时间： | 2013-04-09 |
| 修稿时间： | 2013-07-18 |
SEMI-ANALYTICAL SOLUTION FOR TWO KINDS OF DELAMINATION MODELS OF LAMINATED CYLINDRICAL SHELLS |
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| ZHANG Yinbo, DAN Min. SEMI-ANALYTICAL SOLUTION FOR TWO KINDS OF DELAMINATION MODELS OF LAMINATED CYLINDRICAL SHELLS[J]. Mechanics in Engineering, 2013, 35(5): 47-53,46. doi: 10.6052/1000-0879-13-141 |
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| Authors: | ZHANG Yinbo DAN Min |
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| Affiliation: | Aeronautical Engineering College, Civil Aviation University of China, Tianjin 300300, China |
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| Abstract: | To study the delamination process of a laminated shell, the 8-node isoparametric element formulation for laminated shells based on the Hamilton canonical equation in the Cylindrical Coordinates is derived firstly. Then the separating-combining model and the weak-interface model are used to simulate the delamination between layers. The solution for whole shells is obtained. For the perfect interface and delamination situation, the two models are analyzed and the energy release rate of the delaminated shell is obtained finally. The results of numerical examples show that the energy release rate of a circumferential delamination is larger than that of an axial delamination, and the laminated thickness affects greatly the two models. |
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| Keywords: | Hamilton canonical equation|8-node isoparametric element|cylindrical shell|delamination |
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