Abstract
This paper presents stress intensity factor (SIF) solutions for edge cracks emanating from semicircular notches using the composition of SIF weight functions. The method isolates and combines the geometrical influences defined by constitutive SIF weight functions to yield SIFs for semicircular notches in finite thickness bodies. Finite element analysis was employed to obtain the required stress distributions and to generate reference constitutive SIFs. Problems encountered with curve fitting high gradient stress distributions were addressed and a robust mathematical solution for these was formulated. The new SIF solutions were verified by comparison with published solutions showing a high degree of accuracy and reliability. The composition model was demonstrated to allow rapid generation of SIFs for mode I cracks in complex geometries where the relevant simple constitutive solutions are available. These new solutions expressed as SIF weight functions allow interpolation between the geometrical parameters for which they are valid and also to include the effect of complex stress distributions such as those due to residual stresses.
| Language | English |
|---|---|
| Pages | 423-435 |
| Number of pages | 13 |
| Journal | Fatigue and Fracture of Engineering Materials and Structures |
| Volume | 28 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - 1 May 2005 |
Fingerprint
Keywords
- composition
- constitutive weight functions
- stress intensity factor
- weight function
- weight function coefficients
- stress intensity factors
Cite this
}
Stress intensity factors for cracks emanating from two-dimensional semicircular notches using the composition of SIF weight functions. / Teh, L. S.; Brennan, F. P.
In: Fatigue and Fracture of Engineering Materials and Structures, Vol. 28, No. 5, 01.05.2005, p. 423-435.Research output: Contribution to journal › Article
TY - JOUR
T1 - Stress intensity factors for cracks emanating from two-dimensional semicircular notches using the composition of SIF weight functions
AU - Teh, L. S.
AU - Brennan, F. P.
PY - 2005/5/1
Y1 - 2005/5/1
N2 - This paper presents stress intensity factor (SIF) solutions for edge cracks emanating from semicircular notches using the composition of SIF weight functions. The method isolates and combines the geometrical influences defined by constitutive SIF weight functions to yield SIFs for semicircular notches in finite thickness bodies. Finite element analysis was employed to obtain the required stress distributions and to generate reference constitutive SIFs. Problems encountered with curve fitting high gradient stress distributions were addressed and a robust mathematical solution for these was formulated. The new SIF solutions were verified by comparison with published solutions showing a high degree of accuracy and reliability. The composition model was demonstrated to allow rapid generation of SIFs for mode I cracks in complex geometries where the relevant simple constitutive solutions are available. These new solutions expressed as SIF weight functions allow interpolation between the geometrical parameters for which they are valid and also to include the effect of complex stress distributions such as those due to residual stresses.
AB - This paper presents stress intensity factor (SIF) solutions for edge cracks emanating from semicircular notches using the composition of SIF weight functions. The method isolates and combines the geometrical influences defined by constitutive SIF weight functions to yield SIFs for semicircular notches in finite thickness bodies. Finite element analysis was employed to obtain the required stress distributions and to generate reference constitutive SIFs. Problems encountered with curve fitting high gradient stress distributions were addressed and a robust mathematical solution for these was formulated. The new SIF solutions were verified by comparison with published solutions showing a high degree of accuracy and reliability. The composition model was demonstrated to allow rapid generation of SIFs for mode I cracks in complex geometries where the relevant simple constitutive solutions are available. These new solutions expressed as SIF weight functions allow interpolation between the geometrical parameters for which they are valid and also to include the effect of complex stress distributions such as those due to residual stresses.
KW - composition
KW - constitutive weight functions
KW - stress intensity factor
KW - weight function
KW - weight function coefficients
KW - stress intensity factors
UR - http://www.scopus.com/inward/record.url?scp=17744364893&partnerID=8YFLogxK
U2 - 10.1111/j.1460-2695.2005.00872.x
DO - 10.1111/j.1460-2695.2005.00872.x
M3 - Article
VL - 28
SP - 423
EP - 435
JO - Fatigue and Fracture of Engineering Materials and Structures
T2 - Fatigue and Fracture of Engineering Materials and Structures
JF - Fatigue and Fracture of Engineering Materials and Structures
SN - 8756-758X
IS - 5
ER -