玻璃纤维片材非破坏试验的控制方法试验研究

By using the methods of control force value and control deformation value, a total of 96 non-destructive tensile tests of glass fiber sheet specimens were completed on the basis of the destructive tests of 7 specimens. The control levels of force were 15%, 20%, 30% and 40% of the ultimate tensile force of the destroyed specimens respectively, and the control levels of deformation were 15%, 20%, 30% and 40% of the ultimate deformation of the destroyed specimens respectively. The results show that under different control methods, the test accuracy is different and the damage degree of the specimens is different. At the same control level, the dispersion degree of the test results obtained by force control is smaller than that of deformation control. When the control level is greater than 40%, the specimens will have greater damage. When the control level is less than 40%, each specimen can complete the既定 tensile test without damage. This test method provides an engineering basis for non-destructive tests in the durability research of fiber-reinforced composites.

采用控制力值和控制变形值的方法,在7个试件的破坏性测试基础上,共完成了96次玻璃纤维片材试件的非破坏性拉伸测试。其力的控制水平分别为破坏试件极限拉力的15%,20%,30%,40%,变形的控制水平分别为破坏试件极限变形的15%,20%,30%,40%。结果表明:不同控制方式下,测试精度不同,试件损伤程度不同,在相同控制水平时,采用力控制得到的试验结果离散程度较变形控制小。控制水平大于40%时,试件将产生较大的损伤,小于40%的控制水平时,各试件均能够完成既定拉伸试验而不受损伤。这种测试方法为纤维增强复合材料耐久性研究中的非破坏性试验提供工程依据。