韧性材料疲劳寿命曲线经典表达式的改进  

Improvement of Classical Expression for Tough Material Fatigue Life-span

作　　者：周中坚[1] 张正元[1] 

机构地区：[1]同济大学汽车工程系

出　　处：《同济大学学报（自然科学版）》1996年第6期692-697,共6页Journal of Tongji University:Natural Science

摘　　要：根据有平均应力情况下的韧性材料疲劳寿命曲线的变化规律，建立了韧性材料高次循环疲劳寿命起始点Ｎｓ与平均应力σｍ之间的关系式，从而改进了韧性材料疲劳寿命曲线的经典表达式，这对韧性材料的疲劳寿命的正确计算是很重要的．This paper, based on the law of tough material fatigue life-span with average stress, establishes a relative expression between the start point Ns of tough material fatigue life- span curve in high time circulatory area and average stress σm, thereby has improved the classical expression for tough material fatigue life-span. It is very important for correct calculation of tough material fatigue life - span.

关 键 词：疲劳寿命曲线 疲劳极限图 韧性材料 

分 类 号：TB301[一般工业技术—材料科学与工程]