【摘要】 参照相关的纤维力学性能测试标准,对高模型HM-PBO复丝纤维的拉伸性能测试方法进行系统研究。结果表明:夹持型夹具和陶瓷材质夹具体适用于PBO干纱复丝拉伸性能测试;捻系数对PBO拉伸性能影响比较大,最佳捻系数为8;同时发现加捻会影响纤维的取向度;在一定范围内拉伸速率的增加会使得纤维断裂强度增加;而在测试范围内的预加张力对PBO纤维拉伸性能影响不大;夹持长度越长,由横梁测得的拉伸形变越接近真实值。更多还原

【Abstract】 According to the relevant testing standards of fiber mechanical properties,the testing method of tensile properties of high model PBO bundle fiber was studied systematically. The results show that the clamping fixture and ceramic material fixture body are suitable for the tensile test of PBO dry yarn. The twist coefficient has a great influence on the tensile properties of PBO,and the optimum value is 8. It is found that twisting will affect the orientation degree of fiber. The increase of the stretching speed will increase the fracture strength of the fiber. The pre-tension has little influence on the tensile properties of the PBO fiber within the testing range. The longer the clamping length is,the closer tensile deformation measured by the crossbeam is to the real value.更多还原