纤维拉伸曲线上屈服点的求取  

The calculation of yield point of fiber tensile curve

作　　者：孔繁荣[1] 甘粤发 陈莉娜[1] KONG Fanrong;GAN Yuefa;CHEN Lina(College of Textile Engineering,Henan University of Engineering,Zhengzhou 450007,China)

机构地区：[1]河南工程学院纺织工程学院,河南郑州450007

出　　处：《河南工程学院学报（自然科学版）》2020年第4期16-18,33,共4页Journal of Henan University of Engineering：Natural Science Edition

基　　金：2017年度河南省高等学校重点科研项目(17A540001);2016年度纺织新产品开发河南省工程实验室开放课题(GCSYS201609);2016年度河南省服用纺织品工程技术研究中心开放课题(CTERC201605)。

摘　　要：采用曼列狄斯法、考泼伦法、角平分线法和三阶导数法求取纤维在拉伸过程中的屈服点。结果表明:曼列狄斯法是4种方法中最简单和快捷的,且对拉伸曲线的形状没有要求;考泼伦法与角平分线法适应性稍差,能否得到屈服点在一定程度上依赖拉伸曲线的形状;三阶导数法理论上对拉伸曲线没有要求,但拟合函数的选择和拟合程度会影响拟合方程与原拉伸曲线的一致性,进而影响屈服点的准确求取。In order to obtain the yield point of the fiber tensile curve,Meredith,Coplan,angle bisector and third-order derivative methods are used.The results show that the Meredith method is the simplest and fastest method,and there is no requirement for the shape of the tensile curve.The adaptability of Coplan method and angle bisector method is slightly less than Meredith,and the possibility of calculating depends on the shape of tensile curve to some extent.Theoretically,the third derivative method has no requirements for the tensile curve,but the selection and goodness of fit of the fitting function will affect the consistency between the fitting equation and the original tensile curve,and thus affect the accurate calculation of the yield point.

关 键 词：屈服点 曼列狄斯法 考泼伦法 角平分线法 三阶导数法 

分 类 号：TS107.2[轻工技术与工程—纺织工程]