碳纤维/玻璃纤维混编编织复合材料顶盖中横梁三点弯强度分析
Three-point bending strength analysis of middle cross beam-roof made of carbon/glass fiber-reinforced and 2D triaxial braided composites

根据二维三轴编织复合材料中碳纤维束和玻璃纤维束的空间几何特征，建立了碳纤维/玻璃纤维混编复合材料刚度预报模型；基于Tsai-Wu准则建立了该二维三轴编织复合材料的强度预报模型，提出了针对编织复合材料结构渐进失效分析的一般流程；设计了相应的材料试验，验证了理论模型的有效性；最后，对使用了该材料的顶盖中横梁进行了三点弯强度分析。结果表明横梁容易发生破坏的位置集中在接触位置和棱角上。
A stiffness prediction model was built for carbon/glass fiber-reinforced & 2D triaxial braided composites (2DTBC) in accordance with the feature of spatial geometry of carbon fiber and glass fiber, and a strength prediction model was established based on Tsai-Wu failure criterion, thus a general process of progressive failure analysis of braided composites being created. The corresponding material testing was designed and the engineering constants and strength parameters obtained from it verified the reliability of theoretical models. Furthermore, a strength analysis of three-point bending for middle crossbeam-roof made of carbon/glass fiber-reinforced 2DTBC was conducted. The results show that failure-prone positions are concentrated in the contact positions and edges of crossbeam-roof