三维编织复合材料力学性能研究现状

对三维编织复合材料的力学性能研究现状进行了综述,研究内容大致归纳为细观结构特征研究、有限元仿真研究及实验研究。细观结构研究主要是研究单胞几何模型的建立和编织工艺与单胞结构模型的关系。有限元研究主要集中在利用有限元软件对细观结构模型进行力学分析、刚度强度性能预测。实验研究是运用实验的方法对材料的拉伸性能、弯曲性能及疲劳性能进行研究,并分析编织工艺参数和温度对其力学性能的影响。最后,对目前研究中存在的问题和今后的发展趋势进行了展望。

PROGRESSINNG IN THE RESEARCH ON MECHANICAL PROPERTIES OF 3D BRAIDED COMPOSITES

The research status of mechanical properties of three-dimensional braided composites is reviewed.The research methods can be summarized as follows:the study on the micro structures of fiber distribution,internal structure geometry and interfacial interaction,finite element analysis software to predict its mechanical properties and experimental study on mechanical properties.The study of the microscopic structure is mainly about the establishment of the single cell geometry model and the relationship between the braiding process and the cell structure model.The finite element method is mainly focused on the mechanical analysis and the stiffness strength performance prediction of the meso-structure model by finite element software and the equivalent elastic performance parameters of the material are obtained.The experimental study is to study the tensile properties,flexural properties and fatigue properties of the material.The effects of braided process parameters and temperature on the mechanical properties were analyzed.Finally,the problems existing in the current research and future development trends are prospected.