摘要
利用平均化方法提出了倾斜内锁型三维机织陶瓷基复合材料弹性性能分析的三维细观力学模型,对材料的弹性性能进行了预测。这个力学模型考虑了倾斜内锁型三维机织陶瓷基复合材料经向纤维束的弯曲和纬向纤维束的平直,纤维束的横截面形状尺寸和相邻纤维束之间的孔洞以及材料制造过程中碳纤维性能下降对弹性性能的影响。基于层合板理论,提出两种单胞应变状态假设分别对材料的九个弹性常数进行了推导计算,结果表明两种方法理论的预测值非常接近。计算结果与实验值比较吻合,表明所提出的细观力学模型是合理的,可以为纺织陶瓷基复合材料的优化设计提供有价值的参考。
The volume averaging method is chosen to propose a micromechanical model for elastic behavior analysis of 3D angle-interlock woven ceramic composites,where the actual fabric structure containing fiber undulation and continuity,the cavities between adjacent yarns and the actual cross-section geometry of the yarn are totally taken into account,and the effects of manufacturing ceramic composite the elastic properties are investigated.Based on laminate theory,nine elastic constants of 3D angle-interlock woven ceramic composites are deduced under two strain assumptions.The agreements between theoretical predictions and experimental results demonstrate the feasibility of the proposed model in analyzing elastic properties of 3D woven composites.
出处
《应用力学学报》
CAS
CSCD
北大核心
2007年第1期146-150,共5页
Chinese Journal of Applied Mechanics
