Post-buckling failure studies on quasi-isotropic CFRP panels under positive and negative in-plane shear loading

Kolanu, Naresh Reddy and Raju, Gangadharan and M, Ramji (2020) Post-buckling failure studies on quasi-isotropic CFRP panels under positive and negative in-plane shear loading. Composite Structures, 246 (112379). pp. 1-17. ISSN 02638223

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The shear buckling performance of a flat laminated composite structure depends on various factors like the nature of the applied load, lamina orthotropy, stacking sequence and the support boundary conditions. The emphasis of the current work is to decipher the effect of the direction of applied shear on the post-buckling response and failure of a quasi-isotropic carbon CFRP panel. A comprehensive experimental test campaign involving 3D-digital image correlation (DIC), acoustic emission (AE) and strain gaging techniques are used to capture the post-buckling deformation and the associated failure mechanisms in the CFRP test panels under positive and negative shear load. Further, a generic finite element based progressive damage model involving 3D Hashin's failure criteria in conjunction with the cohesive zone model is developed in Abaqus software for simulating the intra and inter-laminar damages in the quasi-isotropic laminate and later compared with the experimental results. The effect of positive and negative shear on the post-buckling response and the associated damage modes are investigated in detail. The outcome of the current investigations reveals that the direction of the shear load has a definite impact on the post-buckling response and failure behavior of the CFRP test panels.

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IITH Creators:
IITH CreatorsORCiD
Raju, Gangadharan0000-0002-6612-8280
M, Ramji0000-0002-8909-9224
Item Type: Article
Additional Information: The current research was partially supported by the Department of Science and Technology (DST) through the Fast Track Scheme for Young Scientists (Project No's: YSS/2014/000435, YSS/2015/000677). The authors would like to acknowledge JICA for funding the ACUT system and digital microscope used in this work. The authors are also grateful to the staff of Central Workshop IIT Hyderabad for their support and help in the manufacturing of test fixtures and panels.
Uncontrolled Keywords: Acoustic emission; Digital image correlation; Negative shear; Positive shear; Post-buckling; Progressive damage model;3d digital image correlations; Cohesive zone model; Experimental test; In-plane shear loadings; Post buckling deformation; Postbuckling response; Progressive damage; Quasiisotropic laminates
Subjects: Physics > Mechanical and aerospace
Divisions: Department of Mechanical & Aerospace Engineering
Depositing User: . LibTrainee 2021
Date Deposited: 09 Aug 2021 04:48
Last Modified: 15 Nov 2022 12:59
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