CFRP筋拉伸强度预测模型评价及应用

doi:10.11868/j.issn.1001-4381.2015.001435

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摘要

在初步建立CFRP筋拉伸强度预测模型基础上，对该模型典型因子影响材料强度权重进行研究评价，根据结果提出CFRP筋制备过程中强度补偿机制。结果表明：典型因子碳纤维拉伸强度（σ_f）和体积分数（V_f）对CFRP筋拉伸强度影响最为显著（影响率为39.1%~46.7%和43.5%~52.6%），是决定CFRP筋拉伸性能的最重要因素。公称直径（D）对CFRP筋拉伸强度存在一定程度影响（影响率7.1%~15.4%）。基体树脂强度（σ_m）对CFRP筋拉伸强度影响不明显（影响率0.3%~1.0%），相比其他三种因素，可近似忽略。依据预测模型典型因子强度补偿规律，可较方便推测CFRP筋组分碳纤维强度及体积分数参数。

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	王彬
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	曾滨

关键词 ： CFRP筋, 拉伸强度, 预测, 评价

Abstract：

Based on the prediction formula of tensile strength for CFRP bars, weight of influence of the typical factors on material strength was evaluated, and the mechanism of intensity compensation in the process of preparing CFRP bar was proposed. The results show that the effect of typical factors of carbon fiber tensile strength and volume fraction effect on the tensile strength of CFRP bars is most significant (influence rate:39.1%-46.7% and 43.5-52.6%). They are the most important factors that determine the tensile properties of CFRP bars. Nominal diameter has a certain effect on the tensile strength of CFRP bars (influence rate:7.1%-15.4%). Influence of resin matrix strength on the tensile strength of the CFRP bar is not obvious (influence rate:0.3%-1.0%). Compared to the other three factors, the influence of the tensile strength of resin can be nearly neglected. According to the intensity compensation rule of the typical factors, the strength and volume fraction of carbon fiber in CFRP bars can be easily inferred.

Key words： CFRP bars tensile strength prediction evaluation

收稿日期: 2015-11-24 出版日期: 2017-10-18

中图分类号:

TQ327.3

基金资助:国家高技术研究发展计划项目(2012AA03A204)

通讯作者: 王彬 E-mail: mccwangbin@126.com

作者简介: 王彬(1984-), 女, 工程师, 博士, 主要从事高性能纤维增强复合材料方向研究, 联系地址:北京市海淀区西土城路33号中冶建筑研究总院有限公司2^#504检测中心研发部(100088), E-mail:mccwangbin@126.com

引用本文:

王彬, 杨勇新, 岳清瑞, 曾滨. CFRP筋拉伸强度预测模型评价及应用[J]. 材料工程, 2017, 45(10): 117-123.
Bin WANG, Yong-xin YANG, Qing-rui YUE, Bin ZENG. Evaluation and Application of Tensile Strength Prediction for CFRP Bars. Journal of Materials Engineering, 2017, 45(10): 117-123.

链接本文:

http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2015.001435 或 http://jme.biam.ac.cn/CN/Y2017/V45/I10/117

Fig.1 CFRP筋拉伸强度预测模型几种典型因子影响权重

Fig.2 文献报道CFRP筋性能指标^[7-40]

Fig.3 CFRP筋拉伸强度分布规律

Table 1 不同公称直径CFRP筋拉伸强度的差异

Fig.4 不同CFRP筋拉伸强度典型因子强度补偿关系

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