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Matrix Crack Detection in Composite Plate with Spatially Random Material Properties using Fractal Dimension

Umesh, K and Ganguli, R (2014) Matrix Crack Detection in Composite Plate with Spatially Random Material Properties using Fractal Dimension. In: CMC-COMPUTERS MATERIALS & CONTINUA, 41 (3). pp. 215-239.

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Official URL: http://dx.doi.org / doi:10.3970/cmc.2014.041.215

Abstract

Fractal dimension based damage detection method is investigated for a composite plate with random material properties. Composite material shows spatially varying random material properties because of complex manufacturing processes. Matrix cracks are considered as damage in the composite plate. Such cracks are often seen as the initial damage mechanism in composites under fatigue loading and also occur due to low velocity impact. Static deflection of the cantilevered composite plate with uniform loading is calculated using the finite element method. Damage detection is carried out based on sliding window fractal dimension operator using the static deflection. Two dimensional homogeneous Gaussian random field is generated using Karhunen-Loeve (KL) expansion to represent the spatial variation of composite material property. The robustness of fractal dimension based damage detection method is demonstrated considering the composite material properties as a two dimensional random field.

Item Type: Journal Article
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Additional Information: Copy right for this article belongs to the TECH SCIENCE PRESS, 6825 JIMMY CARTER BLVD, STE 1850, NORCROSS, GA 30071 USA
Keywords: Fractal dimension; damage detection; matrix cracks; spatial uncertainty; Karhunen-Loeve expansion
Department/Centre: Division of Mechanical Sciences > Aerospace Engineering (Formerly, Aeronautical Engineering)
Date Deposited: 24 Feb 2015 06:01
Last Modified: 24 Feb 2015 06:01
URI: http://eprints.iisc.ernet.in/id/eprint/50864

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