Calculation of mixed mode stress intensity factors for an elliptical subsurface crack under arbitrary normal loading

被引：9

作者：

Alizadeh K, J. ^{[1
]}

Ghajar, R. ^{[1
]}

机构：

[1] KN Toosi Univ Technol, Fac Mech Engn, Tehran, Iran

来源：

FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES | 2015年 / 38卷 / 06期

关键词：

elliptical subsurface cracks; mixed mode weight functions; semi-infinite space; two-dimensional stress distribution; WEIGHT FUNCTION; INFINITE MEDIUM;

D O I：

10.1111/ffe.12271

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Normal loading causes mixed fracture modes in an elliptical subsurface crack because of the nonsymmetrical geometry with respect to the crack face. In this paper, mixed mode weight functions (MMWFs) for elliptical subsurface cracks in an elastic semi-infinite space under normal loading are derived. Reference mixed mode stress intensity factors (MMSIFs), calculated by finite element analysis, under uniform normal loading are used to derive MMWFs. The cracks have aspect ratios and crack depth to crack length ratios of 0.2-1.0 and 0.05 to infinity, respectively. MMWFs are used to calculate MMSIFs for any point of the crack front under linear and nonlinear two-dimensional (2D) loadings. So, in order to evaluate the fatigue crack growth phenomenon under complicated 2D stress distributions, MMWFs can be easily used. The comparison between the MMSIFs obtained from the MMWFs and finite element analysis indicates high accuracy.

引用

页码：700 / 713

页数：14

共 27 条

[1] Stress intensity factor for an embedded elliptical crack under arbitrary normal loading [J].

Atroshchenko, E. ;

Potapenko, S. ;

Glinka, G. .

INTERNATIONAL JOURNAL OF FATIGUE, 2009, 31 (11-12) :1907-1910

[2]

Atroshchenko E., 2010, Stress intensity factors for elliptical and semi-elliptical cracks subjected to an arbitrary mode-I loading

[3] A weight function for 2D subsurface cracks under general loading conditions [J].

Beghini, M. ;

Bertini, L. ;

Fontanari, V. .

ENGINEERING FRACTURE MECHANICS, 2008, 75 (3-4) :427-439

[4]

BUECKNER HF, 1970, Z ANGEW MATH MECH, V50, P529

[5] A PROCEDURE FOR THE DETERMINATION OF THE WEIGHT FUNCTION FOR SEMIELLIPTIC SURFACE CRACKS BY DIRECT ADJUSTMENT TO REFERENCE SOLUTIONS [J].

FETT, T .

ENGINEERING FRACTURE MECHANICS, 1992, 43 (04) :519-528

[6] DIRECT DETERMINATION OF WEIGHT-FUNCTIONS FROM REFERENCE LOADING CASES AND GEOMETRICAL CONDITIONS [J].

FETT, T .

ENGINEERING FRACTURE MECHANICS, 1992, 42 (03) :435-444

[7] Mixed mode stress intensity factors for elliptical subsurface cracks in an elastic half-space subjected to a uniform normal loading [J].

Ghajar, R. ;

Alizadeh K, J. .

FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES, 2013, 36 (11) :1199-1208

[8] A neural network approach for predicting steel properties characterizing cyclic Ramberg-Osgood equation [J].

Ghajar, R. ;

Naserifar, N. ;

Sadati, H. ;

Alizadeh K, J. .

FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES, 2011, 34 (07) :534-544

[9]

Ghajar R., 2010, INT J ADV DES MANUF, V4, P11

[10] General point load weight function for semi-elliptical crack in finite thickness plates [J].

Ghajar, Rahmatollah ;

Googarchin, Hamed Saeidi .

ENGINEERING FRACTURE MECHANICS, 2013, 109 :33-44

← 1 2 3 →