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Matrix cracking in polymer matrix composites under bi-axial loading

Jagannathan, N and Gururaja, S and Manjunatha, CM (2019) Matrix cracking in polymer matrix composites under bi-axial loading. In: 2nd International Conference on Structural Integrity and Exhibition, SICE 2018, 25 - 27 July 2018, Hyderabad, pp. 864-871.

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Official URL: https://doi.org/10.1016/j.prostr.2019.07.065


A model to predict the matrix crack evolution in a continuous fiber polymer composite laminate under in-plane biaxial static loading has been presented in the current work. Oblique co-ordinate based shear lag analysis was used to estimate the stress distribution inside the cracked 0/90 s cross-ply T300/934 carbon fiber reinforced plastic (CFRP) laminate. Weibull probability distribution has been used to account for the variation in ply transverse strength. Size-dependent strength due to variation in ply thickness has been accounted for by appropriate volume scaling based Weibull scale factor. The Weibull parameters have been estimated using a 'master laminate' crack evolution data. By applying incremental stress to the laminate, using the probabilistic variation of transverse strength and the stress at a material point, the new crack location has been identified using the Hashin matrix cracking criterion. The reciprocal of the normal distance between two cracks has been termed as crack density. The crack density evolution for cross-ply laminates with an increase in applied loading has been estimated for various bi-axial ratios and compared with the data available from the literature. A good correlation is found to exist between the literature evolution data and current simulation predictions.

Item Type: Conference Paper
Publication: Procedia Structural Integrity
Publisher: Elsevier B.V.
Additional Information: The copyright for this article belongs to the Authors.
Department/Centre: Division of Mechanical Sciences > Aerospace Engineering(Formerly Aeronautical Engineering)
Date Deposited: 25 Oct 2022 10:42
Last Modified: 25 Oct 2022 10:42
URI: https://eprints.iisc.ac.in/id/eprint/77568

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