TY - JOUR
T1 - Performance of digital image correction technique for mild steel with different strain hardening effects
AU - Zhang, Bohua
AU - Wang, Weigang
AU - Lei, Haoran
AU - Hu, Xiancun
AU - Li, Chun Qing
N1 - Funding Information:
The authors gratefully acknowledge the financial support provided by the Australian Research Council through grants DP230100983 and IC230100015 . The first author acknowledges the invaluable technical support provided by William Song from the material testing laboratory, Eric Gao from the heavy structure laboratory, and Paul Muscat from the manufacture & fabrication laboratory at RMIT. The first author also expresses gratitude to Belinda Domaille from the structural testing department at RMIT for her kind assistance with technical coordination.
Funding Information:
The authors gratefully acknowledge the financial support provided by the Australian Research Council through grants DP230100983 and IC230100015. The first author acknowledges the invaluable technical support provided by William Song from the material testing laboratory, Eric Gao from the heavy structure laboratory, and Paul Muscat from the manufacture & fabrication laboratory at RMIT. The first author also expresses gratitude to Belinda Domaille from the structural testing department at RMIT for her kind assistance with technical coordination.
Publisher Copyright:
© 2024 The Author(s)
PY - 2024/1
Y1 - 2024/1
N2 - This paper investigates the performance of Digital Image Correction (DIC) technique in determining the initial fracture toughness of mild steel with different strain hardening effects. To achieve this goal, the results of DIC technique-based method are compared with those of the commonly used unloading compliance (UC) method. The comparison results reveal that the DIC technique-based method exhibit a good agreement with the UC method in determining initial fracture toughness, with a deviation of less than 3.0 %. Additionally, the DIC technique-based method demonstrates the consistency in determining the initial fracture toughness, independent of the ratio of initial pre-crack length to width. Furthermore, the importance of strain hardening effects on initial fracture toughness follows the order of strain hardening capacity, effective yield stress, and yield offset. The significance of this paper is that it provides a deep understanding of the performance of the DIC technique in determining the initial fracture toughness of mild steel.
AB - This paper investigates the performance of Digital Image Correction (DIC) technique in determining the initial fracture toughness of mild steel with different strain hardening effects. To achieve this goal, the results of DIC technique-based method are compared with those of the commonly used unloading compliance (UC) method. The comparison results reveal that the DIC technique-based method exhibit a good agreement with the UC method in determining initial fracture toughness, with a deviation of less than 3.0 %. Additionally, the DIC technique-based method demonstrates the consistency in determining the initial fracture toughness, independent of the ratio of initial pre-crack length to width. Furthermore, the importance of strain hardening effects on initial fracture toughness follows the order of strain hardening capacity, effective yield stress, and yield offset. The significance of this paper is that it provides a deep understanding of the performance of the DIC technique in determining the initial fracture toughness of mild steel.
KW - Digital image correlation technique
KW - Initial fracture toughness
KW - Strain hardening effects
KW - Unloading compliance method
KW - δ-R curve
UR - http://www.scopus.com/inward/record.url?scp=85182508398&partnerID=8YFLogxK
U2 - 10.1016/j.tafmec.2024.104253
DO - 10.1016/j.tafmec.2024.104253
M3 - Article
AN - SCOPUS:85182508398
SN - 0167-8442
VL - 130
SP - 1
EP - 15
JO - Theoretical and Applied Fracture Mechanics
JF - Theoretical and Applied Fracture Mechanics
M1 - 104253
ER -