Influence of the Geometric Parameters on the Fiber Stresses in Unidirectional Composites Subject to Transverse Loading

IF 1.5 4区 材料科学 Q3 ENGINEERING, MECHANICAL
Challa Geetha Krishna, Yash Anup Vora, Ishan Manoj, Tushar M. Patle, Atul Jain
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引用次数: 1

Abstract

When a unidirectional (UD) composite is subjected to transverse loading, different fibers are not stressed equally. In this paper, realizations of virtual random representative volume element (RVE) and experimental SEM images are translated into finite element models and the average stresses in each fiber are determined. The average stress in individual fibers is correlated with various geometric parameters like nearest neighbor distance, the angle(s) between the nearest neighbor and local fiber volume fraction. A very loose correlation with significant outliers is observed. For the matrix, the region with the highest fiber content does not necessarily lead to the highest matrix stress. The fibers with highest average stresses and the regions with highest matrix stresses are difficult to determine and cannot be simply correlated with geometric parameters.
几何参数对单向复合材料横向加载纤维应力的影响
当单向(UD)复合材料受到横向载荷时,不同的纤维不会受到同等的应力。本文将虚拟随机代表体积单元(RVE)和实验SEM图像的实现转化为有限元模型,并确定了每条纤维中的平均应力。单个纤维中的平均应力与各种几何参数相关,如最近邻距离、最近邻与局部纤维体积分数之间的角度。观察到与显著异常值之间存在非常松散的相关性。对于基体,具有最高纤维含量的区域不一定导致最高的基体应力。具有最高平均应力的纤维和具有最高基体应力的区域难以确定,并且不能简单地与几何参数相关。
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来源期刊
CiteScore
3.00
自引率
0.00%
发文量
30
审稿时长
4.5 months
期刊介绍: Multiscale characterization, modeling, and experiments; High-temperature creep, fatigue, and fracture; Elastic-plastic behavior; Environmental effects on material response, constitutive relations, materials processing, and microstructure mechanical property relationships
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