摘要
为了提高短纤维增强橡胶复合材料的性能预测精度,考虑短纤维增强橡胶复合材料内部的纤维大多呈现随机的波浪形,使用了一种离散化建模方法,建立了具有波浪形纤维的短纤维增强橡胶复合材料二维代表性体积单元模型。对数值模型进行单轴拉伸模拟并与实验测量值进行对比,并分析了纤维形态对短纤维增强橡胶复合材料力学性能的影响。结果表明:数值模拟结果与实验测量值可以很好地吻合,模型具有良好的可靠性;纤维的波浪形弯曲减弱了纤维的增强性能;纤维形态对短纤维增强橡胶复合材料力学性能的影响机制与纤维含量相关,在低体积分数情况下,SFRC(short fiber-reinforced rubber composite)的模量随模型的卷曲率的升高而降低;在高体积分数情况下,SFRC的模量随模型的卷曲率的升高呈现先增后减的趋势。
In order to improve the prediction accuracy of short fiber reinforced rubber composites performance,considering that most of the fibers inside short fiber reinforced rubber composites present random wavy shapes,a discrete modeling method was used to establish a two-dimensional representative volume element model of short fiber reinforced rubber composites with wavy fibers.The uniaxial tensile simulation of the numerical model was carried out and compared with the experimental values.The influence of fiber morphology on the mechanical properties of short fiber reinforced rubber composites was analyzed.The results show that the numerical simulation results fit well with the experimental measurements and the model has good reliability.The wavy bending of fibers weakens the strengthening properties of fibers.The influence mechanism of fiber morphology on mechanical properties of short fiber reinforced rubber composites is related to fiber content.At low volume fraction,the modulus of SFRC decreases with the increase of the model crimp percentage.In the case of high volume fraction,the modulus of SFRC increases first and then decreases with the increase of the volume crimp percentage of the model.
作者
魏大文
杨晓翔
高剑虹
WEI Dawen;YANG Xiaoxiang;GAO Jianhong(School of Mechanical Engineering and Automation,Fuzhou University,350108 Fuzhou,China;Fujian Business University,350108 Fuzhou,China;College of Chemical Engineering and Material,Quanzhou Normal University,362000 Quanzhou,China)
出处
《应用力学学报》
北大核心
2025年第5期1106-1118,共13页
Chinese Journal of Applied Mechanics
基金
国家自然科学基金资助项目(No.11972005)
福建省自然科学基金资助项目(No.2021J01963)。
关键词
短纤维增强橡胶复合材料
短纤维
纤维形态表征
力学性能
卷曲率
rubber composite material
short fiber
fiber morphological characterization
mechanical property
crimp percentage
