Experimental evaluation of the strain intensity factor at the rigid line inclusion tip embedded in an epoxy matrix using digital image correlation

Jobin, T M and Khaderi, Syed Nizamuddin and Ramji, M (2020) Experimental evaluation of the strain intensity factor at the rigid line inclusion tip embedded in an epoxy matrix using digital image correlation. Theoretical and Applied Fracture Mechanics, 106. ISSN 0167-8442 (In Press)

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The strain intensity factor for a rigid line inclusion tip is experimentally determined using the digital image correlation (DIC) technique using multi-parameter displacement field equations. The multi-parameter displacement field equations for a rigid line inclusion are derived based on the Airy’s stress function approach and are reported here in an elegant manner. The unknown coefficients in the multi-parameter equation, inclusion tip location, rigid body translations and rotation are determined using a linear least squares method in an over-deterministic manner. A rigid line inclusion specimen is prepared using 0.1 mm steel strip embedded in an epoxy matrix. Experiments are performed for two inclusion configurations when the embedding matrix is subjected to a remote tensile field. In the first configuration, the inclusion is placed along the tensile loading direction. In the second configuration, the inclusion is kept inclined to the loading direction. The experimentally obtained strain intensity factor agrees well with the analytical estimates with an error less than 6% for the seven parameter solution for both the configuration, thereby confirming the accuracy of the proposed methodology.

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IITH Creators:
IITH CreatorsORCiD
Khaderi, Syed NizamuddinUNSPECIFIED
Item Type: Article
Additional Information: MR gratefully acknowledge the Department of Science and Technology (DST), India for the partial funding of this research work through the Fast Track Scheme for Young Scientists (project No.: YSS/2014/000435). The authors are thankful to the staff members of IITH central workshop for assistance in fabricating the specimen. The authers are also thankful to Mr. Naresh Reddy Kolanu, Mr. Matta Seshadri and Mr. Dongri Karthik for helping in conducting the experiments.
Uncontrolled Keywords: Digital Image Correlation; Least squares; Multi-parameter equations; Rigid line inclusion; Strain intensity factor
Subjects: Physics > Mechanical and aerospace
Divisions: Department of Mechanical & Aerospace Engineering
Depositing User: Team Library
Date Deposited: 12 Dec 2019 06:50
Last Modified: 03 Nov 2022 14:33
URI: http://raiith.iith.ac.in/id/eprint/7137
Publisher URL: http://doi.org/10.1016/j.tafmec.2019.102425
OA policy: https://v2.sherpa.ac.uk/id/publication/12462
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