An equivalent elastoplastic damage model based on micromechanics for hybrid fiber-reinforced composites under uniaxial tension
An equivalent elastoplastic damage model based on micromechanics for hybrid fiber-reinforced composites under uniaxial tension
复制标题
基于微观力学的混合纤维增强复合材料单轴拉伸等效弹塑性损伤模型
DOI：
10.1177/1056789517744425
复制
发表时间：
2019
影响因子：
4.2
通讯作者：
Hehua Zhu
中科院分区：
文献类型：
--
作者：
Zhiguo Yan;Yao Zhang;J Woody Ju;Qing Chen;Hehua Zhu
本文提出了一种基于细观力学的混杂纤维增强复合材料的等效弹塑性损伤模型。在该模型中，弹性模量，初裂强度和极限强度估计基于细观力学。为了量化基体开裂后的应变，基于损伤力学定义了一种新的特征长度。研究了纤维长度、直径、模量和界面粘结应力对混杂纤维增强复合材料特征长度的影响。为了避免传统损伤势函数和塑性势函数难以确定的问题，本模型从细观层次的单纤维行为发展到宏观层次的混杂纤维增强复合材料响应。然后用几种已发表的纤维增强复合材料和混杂纤维增强复合材料的实验结果对计算结果进行了验证，包括缺口敏感型裂纹纤维增强复合材料、多裂纹纤维增强复合材料和两种纤维（钢纤维和聚乙烯纤维）混杂的多裂纹纤维增强复合材料。研究了纤维体积分数、纤维长度、纤维直径和界面粘结应力对类钢纤维和类聚乙烯纤维混杂纤维增强复合材料拉伸性能的影响。结果表明，与钢纤维相比，聚乙烯类纤维能更有效地提高复合材料的拉伸性能。
A micromechanics-based equivalent elastoplastic damage model for both notch-sensitive and multiple cracking hybrid fiber reinforced composite is proposed in this study. In this model, the elastic modulus, first cracking strength, and ultimate strength are estimated based on micromechanics. To quantify strain after matrix cracks, a novel characteristic length is defined based on the damage mechanics. The effects of the fiber length, diameter and modulus, and interfacial bond stress on the characteristic length of hybrid fiber reinforced composite are presented. In order to avoid the difficulty of determining the traditional damage and plastic potential function, this model is developed from the behavior of single fiber at mesolevel to the response of hybrid fiber reinforced composite at macrolevel. Then the calculated results are verified with several published experimental results of fiber reinforced composites and hybrid fiber reinforced composite, including notch-sensitive cracking fiber reinforced composite, multiple cracking fiber reinforced composite, and multiple cracking hybrid fiber reinforced composite reinforced with two types of fibers (steel fiber and polyethylene fiber). A parametric study has been performed to investigate the effects of the fiber properties, including the fiber volume fraction, length, diameter, and interfacial bond stress, on the tensile performance of hybrid fiber reinforced composite reinforced with steel fiber-like and polyethylene fiber-like fibers. The results indicate that enhancement of the tensile performance can be achieved more effectively by improving the polyethylene fiber-like fiber than steel fiber-like fiber.
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DOI：
10.1016/s1065-7355(97)90001-8
发表时间：
1997-06
期刊：
Advanced Cement Based Materials
影响因子：
--
作者：
V. Li;H. Stang
通讯作者：
V. Li;H. Stang
考虑骨料和 ITZ 效应的混合纤维混凝土多相微力学模型
影响因子：
7.4
作者：
Chen Qing;Zhu Hehua;Yan Zhiguo;Ju J Woody;Jiang Zhengwu;Wang Yaqiong
通讯作者：
Wang Yaqiong
影响因子：
4.2
作者：
B. Xu;J. Ju;H. Shi
通讯作者：
B. Xu;J. Ju;H. Shi
影响因子：
9.1
作者：
L. Mishnaevsky;P. Brøndsted
通讯作者：
L. Mishnaevsky;P. Brøndsted
DOI：
10.1016/j.ijsolstr.2016.03.005
发表时间：
2016-06
影响因子：
3.6
作者：
Jian‐Ying Wu;M. Cervera
通讯作者：
Jian‐Ying Wu;M. Cervera