基于Weibull概率分布的纤维增强复合材料损伤演化分析

复合材料科学与工程 ›› 2014, Vol. 0 ›› Issue (8): 49-53.

基于Weibull概率分布的纤维增强复合材料损伤演化分析

吴毅彬^1,2

1.上海颖川加固工程技术有限公司,上海 201102;
2.同济大学结构工程与防灾研究所,上海 200092

收稿日期:2013-12-24 出版日期:2014-08-28 发布日期:2021-09-13
作者简介:吴毅彬(1982-),男,工学博士,主要从事工程抗震与防灾、结构鉴定与加固方向的研究。
基金资助:
上海市“扬帆计划”科研课题项目(14YF1414800);上海市科研计划课题项目(1104H105000)

ANALYSIS ON DAMAGE EVOLVEMENT OF FIBER REINFORCED POLYMER BY WEIBULL PROBABILITY DISTRIBUTION

WI Yi-bin^1,2

1. Shanghai Yingchuan Reinforce Technical Co., Ltd., Shanghai 201102, China;
2. Research Institute of Structural Engineering and Disaster Reduction,Tongji University,Shanghai 200092,China

Received:2013-12-24 Online:2014-08-28 Published:2021-09-13

摘要/Abstract

摘要： 利用已有的纤维增强复合材料性试验样本,运用统计分析与拟合优度检验方法证明选取二参数Weibull分布函数近似估计纤维增强复合材料拉伸强度与弹性模量分布类型的合理性。通过拉伸强度与损伤变量的关系建立纤维增强复合材料的损伤演化模型,并利用试验数据与线性拟合方法推导不同层数纤维增强复合材料的演化方程。损伤演化分析结果表明,在同等损伤情况下,单层纤维增强复合材料比二、三、四层纤维增强复合材料拉伸强度分别高出10％、20％、25％,拉伸强度随着层数的增加呈逐渐降低趋势,而层数对材料弹性模量的影响可忽略不计。在此基础上,提出考虑粘贴层数的纤维增强复合材料拉伸强度修正系数κ_layer,系数建议值可供加固设计参考。

关键词: 纤维增强复合材料, 损伤演化, Weibull概率分布, 拉伸强度, 弹性模量

Abstract: The two-parameter Weibull distribution is first recommended for modeling both strength and stiffness properties by using statistical analysis and the goodness-of-fit in this paper. Based on the relationship between damage and tensile strength, a model of damage evolvement for fiber reinforced polymer(FRP) was founded. Combining existing experimental data and linear regression method, damage evolvement equation of FRP for different layers were given out, and it is indicated that the tensile strength was reduced with the increase of FRP layers, according to the same damage. And, the tensile strength of FRP with one layer is 10%, 20% and 25% higher than that with two,three and four layers respectively. Whereas, the infulence of additional layers on modulus can be neglected. Finally, a modified coefficient is suggested to take the effect of additional layers into consideration, and the value can be served as reference for strengthening design.

Key words: fiber reinforced polymer, damage evolvement, Weibull probability distribution, tensile strength, modulus

中图分类号:

TB332
TJ021

吴毅彬. 基于Weibull概率分布的纤维增强复合材料损伤演化分析[J]. 复合材料科学与工程, 2014, 0(8): 49-53.

WI Yi-bin. ANALYSIS ON DAMAGE EVOLVEMENT OF FIBER REINFORCED POLYMER BY WEIBULL PROBABILITY DISTRIBUTION[J]. COMPOSITES SCIENCE AND ENGINEERING, 2014, 0(8): 49-53.

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