Abstract
This paper investigates the accuracy of a numerical method incorporating an image-correlation experiment for finding the crack-tip coordinates, the axes of the measurement and the mixed-mode stress intensity factors (SIFs) of anisotropic materials. Finite element and experimental simulations in this paper indicate that the proposed linear search method incorporating Powell's method is considerably stable for finding the unknown crack-tip coordinates and measurement axes, even though the initial input is far away from the actual data. Moreover, the displacement field very near the crack tip is not necessary. In the experimental validation, the maximum SIF error of the image-correlation experiment is about 9%, which should be acceptable for the mixed-mode fracture problems.
| Original language | English |
|---|---|
| Pages (from-to) | 43-53 |
| Number of pages | 11 |
| Journal | Fatigue and Fracture of Engineering Materials and Structures |
| Volume | 33 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2010 Jan 1 |
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All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Mechanics of Materials
- Mechanical Engineering
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Determination of SIFs, crack-tip coordinates and crack angle of anisotropic materials. / Ju, Shen-Haw; Chiu, C. Y.; Jhao, B. J.
In: Fatigue and Fracture of Engineering Materials and Structures, Vol. 33, No. 1, 01.01.2010, p. 43-53.Research output: Contribution to journal › Article
TY - JOUR
T1 - Determination of SIFs, crack-tip coordinates and crack angle of anisotropic materials
AU - Ju, Shen-Haw
AU - Chiu, C. Y.
AU - Jhao, B. J.
PY - 2010/1/1
Y1 - 2010/1/1
N2 - This paper investigates the accuracy of a numerical method incorporating an image-correlation experiment for finding the crack-tip coordinates, the axes of the measurement and the mixed-mode stress intensity factors (SIFs) of anisotropic materials. Finite element and experimental simulations in this paper indicate that the proposed linear search method incorporating Powell's method is considerably stable for finding the unknown crack-tip coordinates and measurement axes, even though the initial input is far away from the actual data. Moreover, the displacement field very near the crack tip is not necessary. In the experimental validation, the maximum SIF error of the image-correlation experiment is about 9%, which should be acceptable for the mixed-mode fracture problems.
AB - This paper investigates the accuracy of a numerical method incorporating an image-correlation experiment for finding the crack-tip coordinates, the axes of the measurement and the mixed-mode stress intensity factors (SIFs) of anisotropic materials. Finite element and experimental simulations in this paper indicate that the proposed linear search method incorporating Powell's method is considerably stable for finding the unknown crack-tip coordinates and measurement axes, even though the initial input is far away from the actual data. Moreover, the displacement field very near the crack tip is not necessary. In the experimental validation, the maximum SIF error of the image-correlation experiment is about 9%, which should be acceptable for the mixed-mode fracture problems.
UR - http://www.scopus.com/inward/record.url?scp=74349104227&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=74349104227&partnerID=8YFLogxK
U2 - 10.1111/j.1460-2695.2009.01414.x
DO - 10.1111/j.1460-2695.2009.01414.x
M3 - Article
AN - SCOPUS:74349104227
VL - 33
SP - 43
EP - 53
JO - Fatigue and Fracture of Engineering Materials and Structures
JF - Fatigue and Fracture of Engineering Materials and Structures
SN - 8756-758X
IS - 1
ER -