STRESS INTENSITY DETERMINATION BY AN EXPERIMENTAL NUMERICAL HYBRID TECHNIQUE

被引:6
作者
FENG, Z
ROWLANDS, RE
SANFORD, RJ
机构
[1] JILIN UNIV TECHNOL,CHANGCHUN,PEOPLES R CHINA
[2] UNIV MARYLAND,COLLEGE PK,MD 20742
关键词
D O I
10.1243/03093247V264243
中图分类号
TH [机械、仪表工业];
学科分类号
0802 ;
摘要
Stress intensity factors are obtained from displacement-prescribed boundary conditions on a subregion containing the crack. The subregion, whose boundary can be any arbitrary contour within the physical structure, is analysed numerically using structural finite elements. Nodal boundary displacements of this subregion are obtained photomechanically using a smoothing finite element representation. The technique requires little experimental information and is unaffected by rigid body motions. It is numerically stable and accurate - even in the presence of significant experimental scatter - and the measured data need not come from the immediate vicinity of the crack. The method's practicality is demonstrated by determining the stress intensity factors in a compact tension specimen from moire-measured displacements at locations away from the crack tip.
引用
收藏
页码:243 / 251
页数:9
相关论文
共 45 条
[1]  
[Anonymous], METHODS NUMERICAL MA
[2]  
ATLURI SN, 1975, INT J FRACTURE, V2, P257
[3]   DETERMINING K AND RELATED STRESS-FIELD PARAMETERS FROM DISPLACEMENT-FIELDS [J].
BARKER, DB ;
SANFORD, RJ ;
CHONA, R .
EXPERIMENTAL MECHANICS, 1985, 25 (04) :399-407
[4]  
Barsoum R. S., 1976, International Journal for Numerical Methods in Engineering, V10, P25, DOI 10.1002/nme.1620100103
[5]   TRIANGULAR QUARTER-POINT ELEMENTS AS ELASTIC AND PERFECTLY-PLASTIC CRACK TIP ELEMENTS [J].
BARSOUM, RS .
INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING, 1977, 11 (01) :85-98
[6]   A NOTE ON THE SINGULARITY AND STRAIN-ENERGY OF SINGULAR ELEMENTS [J].
BARSOUM, RS .
INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING, 1982, 18 (09) :1420-1422
[7]  
BASTAWROS AF, 1990, SPR P SEM C EXP MECH, P69
[8]  
BERGHAUS DG, 1989, SPR P SEM C EXPT MEC, P231
[9]  
BLACKBURN WS, 1973, MATH FINITE ELEMENTS
[10]  
Bradley W.B., 1971, ENG FRAC MECH, V3, P317