Fatigue life prediction using average strain range of fatigue process zone

被引：0

作者：

Lei, Dong ^{[1
]}

Shi, Binkai ^{[1
]}

Li, Ge ^{[1
]}

Zhao, Jianhua ^{[2
]}

机构：

[1] Hohai Univ, Coll Mech & Mat, State Key Lab Hydrol Water Resources & Hydraul En, Nanjing 210098, Peoples R China

[2] Univ Sci & Tech China, Dept Modern Mech, Hefei 230027, Peoples R China

来源：

APPLIED MECHANICS AND MECHANICAL ENGINEERING, PTS 1-3 | 2010年 / 29-32卷

关键词：

fatigue life prediction; average strain range; fatigue process zone; INITIATION; GROWTH; MODEL;

D O I：

10.4028/www.scientific.net/AMM.29-32.474

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

In low-cycle fatigue process, plastic strain takes place at notch root vicinity fast appears induced by high stress concentration. Plastic strain makes material non-uniform and the change of distribution of local stress. The approximation to stress concentration point of Neuber's rule is not suitable for some plastic materials in engineering practice. In this paper, the average strain of fatigue process zone was considered to substitute Neuber strain for predicting fatigue life. Prediction results indicated that average strain range of fatigue process zone is more suitable than Neuber strain range for predicting low-cycle fatigue life of LY12CZ.

引用

页码：474 / +

页数：2

共 10 条

[1]

Coffin L. F., 1954, J FLUIDS ENG, V76, P931, DOI [10.1115/1.4015020, DOI 10.1115/1.4015020]

[2]

Manson S.S., 1954, BEHAVIOUR MAT CONDIT

[3]

MORROW JD, FATIGUE DESIGN HDB A, V4, P21

[4]

Neuber H., 1961, Journal of Applied Mechanics, V28, P544, DOI [DOI 10.1115/1.3641780, 10.1115/1.3641780https://asmedigitalcollection.asme.org/appliedmechanics/articlepdf/28/4/544/5444285/5441.pdf, DOI 10.1115/1.3641780HTTPS://ASMEDIGITALCOLLECTION.ASME.ORG/APPLIEDMECHANICS/ARTICLEPDF/28/4/544/5444285/5441.PDF]

[5]

Osgood C., 1982, Fatigue Design, V2nd

[6] A unified model of initiation and growth of fatigue macrocracks. part 3. Stage of growth of a macrocrack [J].

Ostash, OP ;

Panasyuk, VV .

MATERIALS SCIENCE, 1999, 35 (03) :299-309

[7]

Ostash OP, 1999, FATIGUE FRACT ENG M, V22, P161, DOI 10.1046/j.1460-2695.1999.00098.x

[8] Initiation and growth of corrosion-fatigue cracks near stress concentrators in V95pchT2 aluminum alloy [J].

Ostash, OP ;

Kostyk, EM ;

Makoviichuk, IR ;

Chepil, RV .

MATERIALS SCIENCE, 1999, 35 (01) :1-9

[9] Fatigue process zone at notches [J].

Ostash, OP ;

Panasyuk, VV .

INTERNATIONAL JOURNAL OF FATIGUE, 2001, 23 (07) :627-636

[10]

TOPPER TH, 1969, J MATER, V4, P189

← 1 →