Progressive damage study in an adhesively bonded patch repaired open hole cfrp panel under compressive loading

Khedhar, S and Ramji, M and Chinthapenta, V and Manjunatha, CM (2015) Progressive damage study in an adhesively bonded patch repaired open hole cfrp panel under compressive loading. Journal of Aerospace science and Technologies, 67 (2B). pp. 299-308.

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In this paper, the in-plane compression behavior of an open-hole Carbon fiber reinforced plastic (CFRP) panel adhesively bonded with the external CFRP patches on double-side is studied. Uniaxial compression tests are conducted on both open hole and repaired panel employing ASTM anti-buckling fixture. A finite element based 3D progressive damage model (PDM) is developed to predict the damage initiation and failure in both open hole and double sided repaired CFRP panels under compressive load. Stress-based 3D-Hashins failure criteria along with Yes delamination criteria are used for predicting the damage mechanism in CFRP panel. Further, maximum shear stress criterion is considered to account for the adhesive layer failure resulting in patch debonding. Damage initiation and ultimate load are obtained using PDM approach and they are compared against experimental values. The load-deflection curve and the damage mechanism obtained from PDM is found to be in good coherence with the experimental predictions. Failure mechanism in double-sided patch repaired panels starts with partial patch debonding leading to complete panel failure. Generally, before the final failure of the panel happens the parch debonds.

Item Type: Article
Uncontrolled Keywords: Carbon Fiber Reinforced Plastic (CFRP); Compression; Progressive Damage Modeling (PDM); Finite Element Analysis (FEA); External Patch Repair
Subjects: CHEMISTRY AND MATERIALS > Chemistry and Materials (General)
CHEMISTRY AND MATERIALS > Nonmetallic Materials
Depositing User: Mrs SK Pratibha
Date Deposited: 24 Aug 2022 14:41
Last Modified: 24 Aug 2022 14:41

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