牛角瓜纤维拉伸性能测试方法与评价

Test method and evaluation of tensile properties of calotropis gigantea fiber

阐述了现有牛角瓜纤维拉伸性能测试方法的基本操作过程,重点就取样工具、制样方法和有效数据等问题进行了分析。通过测试不同夹持位置的牛角瓜纤维的拉伸性能,从结果稳定性和准确性角度出发,确定测试其拉伸性能的最佳位置,并将测试结果与文献中牛角瓜纤维的拉伸性能进行对比。结果表明:选用软头硅胶镊子夹取牛角瓜纤维不易造成纤维损伤;相比“纸夹法”制样,GB/T 14337—2008中的制样方法测得的牛角瓜纤维拉伸性能结果更稳定和准确;测试最佳位置为张力夹钳口距下夹持端下沿1 mm左右。优化后的测试方法也为修订牛角瓜纤维拉伸性能测试标准奠定了基础。

The basic operation process of the existing test methods for tensile properties of Calotropis Gigantea fibers is expounded,and problems on sampling tools,sample preparation methods and effective data are analyzed.Based on the data stability and accuracy,the best position is determined by testing tensile properties data of Calotropis Gigantea fiber at different clamping positions,and the data measured at the best position is compared with the tensile properties data found in the current research.The results show that it is not easy to cause fiber damage when using soft-headed silicone tweezers to clamp the fibers;compared with the“paper clip method”,it is relatively more stable and accurate than tensile properties data of Calotropis Gigantea fibers measured by the method in standard GB/T 14337—2008 sample preparation;the best position to test tensile properties of Calotropis Gigantea fiber is about 1 mm from the lower edge of the tension clamp jaws to the lower clamping end.The optimal test method lays a foundation for establishing a new standard for testing tensile properties of Calotropis Gigantea fibers.