摘要
为了预测纤维增强复合材料的拉伸强度,建立基于双线性内聚力模型的含界面代表体积元模型,结合最大应力准则和最大位移准则分析界面在拉伸载荷下的损伤演化过程,得到复合材料纵向和横向拉伸强度,并讨论了温度对SiC/TC4复合材料强度的影响。结果表明,随着温度的升高,复合材料拉伸强度增加,压缩强度减小。开展SiC/TC4层合板拉伸试验,SiC/TC4复合材料纵向和横向拉伸强度预测值与试验强度的误差分别为13.8%和6.9%,可见模型和计算方法有效。
In order to predict the tensile strength of fiber-reinforced composites,a representative volume element model containing interfaces based on the bilinear cohesion model was established.The maximum stress criterion and maximum displacement criterion were combined to analyze the damage evolution process of the interface under tensile load,and the longitudinal and transverse tensile strengths of composite materialst were predicted.The effect of temperature on the strength of SiC/TC4 composites was discussed.The results show that as the temperature increases,the longitudinal tensile strength and transverse tensile strength of the composite increase,while the longitudinal compressive strength and transverse compressive strength decrease.Tensile tests of SiC/TC4 laminates were carried out to verify the validity of the model and calculation method.The errors between the predicted values of longitudinal and transverse tensile strength of SiC/TC4 composites and the test strength were 13.8%and 6.9%,respectively.
作者
沙云东
周颖
骆丽
SHA Yundong;ZHOU Ying;LUO Li(College of Aeroengine,Shenyang University of Aeronautics and Astronautics,Shenyang 110136)
出处
《现代制造技术与装备》
2021年第7期41-47,共7页
Modern Manufacturing Technology and Equipment
关键词
拉伸强度
界面
代表体积元
温度
tensile strength
interface
representative volume element
temperature