Study on Design of Fibrous Composite Materials Based on Stochastic Materials Design
基于随机材料设计的纤维复合材料设计研究
基本信息
- 批准号:04650098
- 负责人:
- 金额:$ 0.9万
- 依托单位:
- 依托单位国家:日本
- 项目类别:Grant-in-Aid for General Scientific Research (C)
- 财政年份:1992
- 资助国家:日本
- 起止时间:1992 至 1993
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Studies of stochastic materials design of composite materials have been performed. For these purpose, design-oriented failure criteria of composite materials are applied to construct an evaluation model of probabilistiv safety based on the extended structural reliability theory. A new design diagra which shows the feasible region on in-plane strain space corresponding to the safety index or failure probability is also proposed. These stochastic failure envelop diagrams which are illustrated onto in-plane strain space enables one to evaluate the stochastic behavior of the composite laminate with any lamination orientation under multi-axial stress or strain condition. The sequential failure path of each layr of composite laminates in simulated by means of modulus degradation and safety Indies under the offaxis load conditions. From the simulation analysis, a typical failure path is evaluated corresponding to an in-plane strain vector. The mechanical behavior, such as decreasing modulus and increasing in-plane strain are also simulated in correspondence with each stage of sequential ply failure. It is necessary to select the important failure path whose occurrence probabilities are greater than others, since there are too many failure paths of multi-layr composite laminate evaluate. The proposed methods of selecting effective failure paths depends upon the heuristic procedure based on one branch and bound rule or selecting effective failure paths depends upon the heuristic procedure based on one branch and bound rule or genetic algorithm which enable one to estimate the effective failure path whose occurrence probabilities are greater. An extended study is performed in order to calculate the failure probability of multiple layr laminates resulting from the effective failure path, some examination for determination of lamination configuration under strength constraints was tried.
对复合材料的随机材料设计进行了研究。基于扩展结构可靠性理论,应用面向设计的复合材料失效准则,建立了复合材料概率安全性评估模型。文中还提出了一种新的设计图,它给出了与安全指标或失效概率相对应的面内应变空间上的可行域。这些随机失效包络图显示在面内应变空间上,使人们能够评估具有任意层合方向的复合材料层合板在多轴应力或应变条件下的随机行为。采用模量退化法和安全指数法模拟了复合材料层合板在偏轴载荷作用下各层的连续失效路径。从模拟分析,一个典型的故障路径进行评估对应的面内应变矢量。模拟了层合板在连续铺层破坏的各个阶段的模量下降和面内应变增加等力学行为。由于多层复合材料层合板的失效路径太多,有必要选择发生概率较大的重要失效路径进行评估。提出的有效失效路径选择方法依赖于基于一个分支和界限规则的启发式过程,或者依赖于基于一个分支和界限规则的启发式过程,或者依赖于遗传算法,其使得能够估计发生概率较大的有效失效路径。本文对多层层板的失效概率进行了扩展研究,并对强度约束下的层合板构型的确定进行了探讨。
项目成果
期刊论文数量(24)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
H.Nakayasu: "Stochastic Materials Design of Fibrous composite Laminates" Proc. IUTAM Symposium on Probabilistic Structural Mechanics. (in press). (1994)
H.Nakayasu:“纤维复合材料层压板的随机材料设计”Proc。
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G.sun, H.Nakayasu, T.Ui: "An Algorithm for Solving Middle-Large-Scale Multi-Objective Planning with a Personal Computer" Proc.1992 Pacific Conference on Manufacturing. 666-673 (1992)
G.sun、H.Nakayasu、T.Ui:“用个人计算机解决中大规模多目标规划的算法”Proc.1992 太平洋制造会议。
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S.Nakanishi, H.Nakayasu: "Uncertainty of Safety Index on Structural Safety" IFIP Transaction. B-12. 189-196 (1993)
S.Nakanishi、H.Nakayasu:“结构安全安全指数的不确定性”IFIP 交易。
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S.Guoqiang,H.Nakayasu T.Ui: "An Algorithm for Solving Middle-Large-Scale Multi-Objective Planning with a Personal Computer" Proc.1992 Pacific Conference on Manufacturing. 666-673 (1992)
S.Guoqiang,H.Nakayasu T.Ui:“一种用个人计算机解决中大规模多目标规划的算法”Proc.1992 太平洋制造会议。
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- 影响因子:0
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H.Nakayasu,Z.Maekawa: "A Comparative Study of Failure Criteria in Probabilistic Fields and Stochastic Failure Envelopes of Composite Materials" Proc. OMAE'92 (11th Offshore Mechanics and Artic Engineering Conference), ASME. 92-1304-1-92-1304-8 (1992)
H.Nakayasu,Z.Maekawa:“概率场失效准则和复合材料随机失效包络线的比较研究”Proc。
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NAKAYASU Hidetoshi其他文献
NAKAYASU Hidetoshi的其他文献
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{{ truncateString('NAKAYASU Hidetoshi', 18)}}的其他基金
Sensitivity Analysis of Inspection for Reliability-Based Composite Material Design Based on Human Factor
基于人为因素的复合材料可靠性设计检验灵敏度分析
- 批准号:
15560088 - 财政年份:2003
- 资助金额:
$ 0.9万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
STUDY ON IMAGE PROCESSING ANALYSIS SYSTEM OF COMPOSITES MATERIALS FOR PRACTICAL APPLICATION OF RELIABILITY DESIGN
可靠性设计实际应用的复合材料图像处理分析系统研究
- 批准号:
11650109 - 财政年份:1999
- 资助金额:
$ 0.9万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
COMPARATIVE STUDY ON SAFETY MEASURES FOR RELIABILITY DESIGN
可靠性设计安全措施的比较研究
- 批准号:
07650125 - 财政年份:1995
- 资助金额:
$ 0.9万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
相似海外基金
Stochastic Materials Design of Fiber Reinforced Composite Laminates
纤维增强复合材料层压板的随机材料设计
- 批准号:
01460096 - 财政年份:1989
- 资助金额:
$ 0.9万 - 项目类别:
Grant-in-Aid for General Scientific Research (B)