| Probabilistic Optimum Design of Symmetric Laminates under First-Ply Failure |
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| 作者姓名： | WANG Xiangyang |
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| 作者单位： | School of Transportation, Wuhan University of Technology,Wuhan 430063, Hubei, China |
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| 基金项目： | Supported by Hubei Key Laboratory of Roadway Bridge and Structure Engineering（2005） |
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| 摘 要： | This paper proposes a procedure for the optimum design of composite laminates with initial imperfection under probabilistic considerations. The initial imperfection, strength parameters and ply-level thickness are considered as random variables. Ply-level failure probability is evaluated by the first order reliability method and system reliability is computed based on the first-ply failure criterion. The optimum design is formulated to consider the laminate thickness as the objective function and reliability requirement as the constraint. A numerical example is presented to demonstrate the methodology proposed.
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| 关 键 词： | 层板 对称层压 首层破坏 可靠性 随机优化设计 |
| 文章编号： | 1007-1202（2007）02-0303-04 |
| 收稿时间： | 2006-03-05 |
Probabilistic optimum design of symmetric laminates under first-ply failure |
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| WANG Xiangyang.Probabilistic Optimum Design of Symmetric Laminates under First-Ply Failure[J].Wuhan University Journal of Natural Sciences,2007,12(2):303-306. |
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| Authors: | Wang Xiangyang |
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| Institution: | (1) School of Transportation, Wuhan University of Technology, Wuhan, 430063, Hubei, China |
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| Abstract: | This paper proposes a procedure for the optimum design of composite laminates with initial imperfection under probabilistic considerations. The initial imperfection, strength parameters and ply-level thickness are considered as random variables. Ply-level failure probability is evaluated by the first order reliability method and system reliability is computed based on the first-ply failure criterion. The optimum design is formulated to consider the laminate thickness as the objective function and reliability requirement as the constraint. A numerical example is presented to demonstrate the methodology proposed. |
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| Keywords: | laminated plates reliability optimum first-ply failure |
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