A NEW DAMAGE VARIABLE FOR LOW-CYCLE FATIGUE OF METALLIC MATERIALS

被引:19
作者
CHENG, GX
LOU, ZW
KUANG, ZB
机构
[1] Department of Engineering Mechanics, Xi'an Jiaotong University, Xi'an
关键词
D O I
10.1016/0013-7944(94)90085-X
中图分类号
O3 [力学];
学科分类号
08 ; 0801 ;
摘要
Experimental results show that the inherent ductility in a material is deflected after cycle loading. Based on the concept of ductility deflection, a new fatigue damage variable D(psi) for low-cycle fatigue is recommended in this paper. This new damage variable D(psi) has definite physical meaning and can be measured with a simple experimental procedure. It can be connected directly with the usual mechanical properties of materials. D(psi) increases slowly at the initial stage of cycle loading, but it increases rapidly after a definite cycle where the macroscale crack is formed. We define the turning point on the D(psi)-N curve as the critical damage value D(c)psi and its corresponding cycle number N is the fatigue life N(f).
引用
收藏
页码:281 / 287
页数:7
相关论文
共 10 条
[1]  
BELA IS, 1972, FUNDAMENTALS CYCLIC
[2]   A NON-LINEAR CONTINUOUS FATIGUE DAMAGE MODEL [J].
CHABOCHE, JL ;
LESNE, PM .
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES, 1988, 11 (01) :1-17
[3]  
CHENG GX, 1992, CHINESE J APPL MECH, V9, P1
[4]  
DIETER GE, 1961, MECHANICAL METALLURG
[5]  
LANDGRAF RW, 1970, ASTM STP, V467, P3
[6]   DAMAGE MEASUREMENTS [J].
LEMAITRE, J ;
DUFAILLY, J .
ENGINEERING FRACTURE MECHANICS, 1987, 28 (5-6) :643-&
[7]   HOW TO USE DAMAGE MECHANICS [J].
LEMAITRE, J .
NUCLEAR ENGINEERING AND DESIGN, 1984, 80 (02) :233-245
[8]  
LOU Zhi-wen, 1991, FUNDAMENTALS DAMAGE
[9]  
Morrow J., 1965, ASTM STP, P45
[10]   CUMULATIVE DAMAGE AND EFFECT OF MEAN STRAIN IN LOW-CYCLE FATIGUE OF A 2024-T351 ALUMINIUM ALLOY [J].
OHJI, K ;
MILLER, WR ;
MARIN, J .
JOURNAL OF BASIC ENGINEERING, 1966, 88 (04) :801-+