摘要
[目的]为有效获取三维圆形编织复合材料力学性能,[方法]在细观尺度下,基于径向增纱三维五向圆形编织复合材料单胞空间拓扑结构,考虑纱线相互挤压后截面形状,引入圆形单胞的周期性边界条件,建立径向增纱三维五向圆形编织复合材料单胞模型。将该单胞模型结合渐进损伤方法以及纤维束的失效模型,建立径向增纱三维五向圆形编织复合材料强度预测模型,利用该强度预测模型模拟了径向增纱三维五向圆形编织复合材料在逐渐增加的拉伸载荷作用下纤维和基体的损伤演化过程。[结果]结果表明:强度预测模型的拉伸强度预测值为370MPa;径向增纱的三维五向圆形编织复合材料的损伤演化过程为基体率先发生破坏,随后是纤维束内基体开裂,之后是纤维束拉伸损伤,最后是纤维束-基体剪切损伤并伴随大量纤维束拉伸损伤直至材料完全破坏。[结论]研究成果可为三维圆形编织复合材料在承力部件的应用提供一定参考。
[Purpose]To effectively obtain the mechanical properties of three-dimensional circular woven composite materials,[Method]at the mesoscopic scale,based on the spatial topological structure of the representative volume element of a three-dimensional five-directional circular braided composite material with radial yarn addition,considering the cross-sectional shape after yarn mutual compression,and introducing the periodic boundary conditions of the circular representative volume element,a representative volume element model of the three-dimensional five-directional circular braided composite material with radial yarn addition is established.By combining this representative volume element model with the progressive damage method and the failure model of the fiber bundles,a strength prediction model for the three-dimensional five-directional circular braided composite with radial yarn addition is established.The strength prediction model is used to simulate the damage evolution of the fibers and matrix in the three-dimensional five-directional circular braided composite with radial yarn addition under gradually increasing tensile loads.[Result]The results show that the predicted tensile strength value of the strength prediction model is 370 MPa;The damage evolution process of the three-dimensional five-directional circular braided composite with radial yarn addition begins with matrix failure,followed by matrix cracking within the fiber bundles,then tensile damage to the fiber bundles,and finally fiber-matrix shear damage accompanied by extensive tensile damage to the fiber bundles,leading to complete material failure.[Conclusion]The research results can provide some references for the application of three-dimensional circular woven composite materials in load-bearing components.
作者
陈波
张月怡
张昇雨
杨兴林
陈书恒
CHEN Bo;ZHANG Yueyi;ZHANG Shengyu;YANG Xinglin;CHEN Shuheng(College of Energy and Power Engineering,Jiangsu University of Science and Technology,Zhenjiang 212003,Jiangsu,China)
出处
《船舶工程》
北大核心
2025年第7期129-138,共10页
Ship Engineering
基金
江苏科技大学科研启动资金(1142931905)。
关键词
三维编织复合材料
圆形编织
径向增纱
单胞
强度预测
three-dimensional braided composites
circular braiding
radial yarn addition
unit cell
strength prediction
