Digital Image Correlation (DIC) Technique for Fracture Toughness Calculation of Microalloyed Steel (38MnVS6)

2018 International Conference on Smart Materials Applications

Patil, Akshay B.^1 ; Toppo, Suraj P.^1 ; Singh, R.K.P.^1

Kalyani Centre for Technology and Innovation, Bharat Forge Ltd., Pune, Maharashtra

411036, India^1

关键词: Conventional methods;    Crack mouth opening displacement;    D. digital image correlation (DIC);    Deformed specimen;    Field displacements;    Micro-alloyed steels;    Optical technique;    Surface displacement;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/422/1/012016/pdf
DOI  :  10.1088/1757-899X/422/1/012016

来源: IOP

【 摘 要 】

The present work shows the practical application of digital image correlation (DIC) technique for fracture toughness (K IC) calculation. DIC is a non-contact, optical technique for measuring full-field displacements and strains by comparing an image of a deformed specimen surface to a reference image taken at un-deformed state. These captured images are correlated and the surface displacements are calculated from which the crack mouth opening displacements (CMOD) is determined. Results of DIC fracture toughness (K IC) value is validated by comparison with fracture toughness (K IC) value calculated from clip gauge. It is observed that the results obtained by DIC are in close agreement with the results obtained through conventional methods.