两步法编织复合材料矩形截面杆件的刚度系数

根据层合板类推原理和一阶剪切变形位移理论分析了两步法编织复合材料矩形截面杆类构件的弹性性能，导出了该类构件的拉伸、弯曲、扭转、剪切以及各种耦合刚度系数的计算公式

The Stiffness Coefficients of Rectangular Cross Section Beams with 2 Step Three Dimensional Braided Composite

The classical theory of laminated plates and the first order shear deformation theory based on the Mindlin hypothesis are used to analyse the elastic behavior of the rectangular cross section beams with 2 step three dimensional braided composite. The formulas for calculating the coefficients of the tensile stiffness, flexural stiffness, torsional stiffness and shear stiffness as well as various coupling stiffness are derived. All these coefficients are functions of variables such as the fiber and matrix types, yarn orientation, total content of fiber volume, axial fiber percentage of total fiber and geometric size of beams.