作　　者： ; ; ; ; ;

机构地区： 郑州大学材料科学与工程学院材料科学与工程系

出　　处： 《郑州大学学报（自然科学版）》 1998年第3期76-80,共5页

摘　　要： 研究尼龙１０１０在不同温度（Ｔ）和拉伸速率（ｖ）下的拉伸屈服行为．在同一温度下，屈服应力（σｙ），细颈扩展阶段的伸长倍数（Δεｙ·ｔ），应变硬化点的应变值（εｔ），应变硬化程度（Ｂ）和二次成颈的应变（εｐ）随拉伸速率的增加近于线性增加；当外推到Ｖ＝０时σ０ｙ，Δε０ｙ·ｔ和Ｂ的平均值（Ｂ）均随温度的升高而增大；当Ｔ＞５０℃时，ε０ｔ近于线性增大，而ε０ｐ在８０℃－１１０℃之间有一最大值；当Ｔ＝１８℃，ｖ＝１０ｍｍ·ｍｉｎ－１和２０ｍｍ·ｍｉｎ－１时σ～ε曲线上有３个峰；随着应变ε的增大，所吸收的韧性能Ａ在ε＜６时近于线性增大，而ε＞６时，Ａ增加较快． The yielding behaviors of nylon 1010 in the tensile test is studied in different drawing temperatures( T ) and rates( v ).When T is a constant,the yield stress( σ y ),the range of neck down( Δε y,t ),the strain at the strain hardening point ( ε t), ε changing rate in the strain hardening range ( B ) and the strain at the second neck down ( ε p ) are increased about linearly with v increasing.When the values are extrapolated to v =0, σ 0 y,Δε 0 y,t and the average value of B(B) are decreased with T increasing. ε 0 t is increased near linearly when T >50 ℃.But ε 0 p has a maximum between 80 ℃ to 110 ℃.When T =18 ℃, v =10 and 20 mm·min -1 ,the σε curves have 3 clear peaks.With ε increasing,the tough energy absorbed during the tensile process( A ) is increased about linearly when ε<6 ,and A is increased quicker when T >50 ℃ and ε>6 .

关 键 词： 尼龙 拉伸试验 屈服 应力 应变

领　　域： [化学工程]