Three-dimensional six-directional (3D6d) braided composites with different braiding angles were prepared, and the influences of temperature and braiding angle on tensile properties and failure mechanisms were studied. The results show that both temperature and braiding angle have significant effects on the tensile properties of 3D6d braided composites. As temperature increases, due to the weakening of the fiber/matrix interface, the stress-strain curve shows a nonlinear upward trend and the tensile properties decrease. As braiding angle increases, the curve declines, and both the tensile strength and modulus diminish. At high temperatures, the damage pattern is mainly braiding fibers multiple shear fracture, fifth fibers tensile fracture, sixth fibers torn, showing expansion outwards, matrix softening and peeling off from the fiber bundles. At 150 °C, the composite shows shear fracture, as the braiding angle increases, the shear fracture characteristics along the braiding angle become prominent. At 200 °C, the composite distorts and expands outwards overall. The fibers pull-out feature become obvious with increasing the braiding angle.

制备了不同编织角度的三维六向（3D6d）编织复合材料，研究了温度和编织角度对拉伸性能和失效机理的影响。结果表明，温度和编织角度对3D6d编织复合材料的拉伸性能有显着影响。随着温度升高，由于纤维/基体界面的弱化，应力-应变曲线呈非线性上升趋势，拉伸性能下降。随着编织角度的增加，曲线下降，并且拉伸强度和模量减小。在高温下，其损伤模式主要为编织纤维多次剪切断裂、第五纤维拉伸断裂、第六纤维撕裂，表现为向外膨胀、基体软化并从纤维束上剥离。在150°C时，复合材料呈现剪切断裂，随着编织角的增加，沿编织角的剪切断裂特征变得突出。在 200 °C 时，复合材料整体变形并向外膨胀。随着编织角度的增加，纤维拉出特征变得明显。