Damage Detection of Surface Crack in Composite Quasi-Isotropic Laminate Using Modal Analysis and Strain Energy Method

Hui Wen Hu; Bor Tsuen Wang; Cheng Hsin Lee

doi:10.4028/www.scientific.net/KEM.306-308.757

Paper Titles

Investigating Strain Rate Effect on Transverse Compressive Strength of Fiber Composites
p.733

Study on Ballistic Energy Absorption of Laminated and Sandwich Composites
p.739

Viscoelastic Effect on the Fracture Toughness of GFRP: Experimental Approach
p.745

Comparison of Mechanical Properties of Compression and Injection Molded PEEK/Carbon Fiber Reinforced Composites
p.751

Damage Detection of Surface Crack in Composite Quasi-Isotropic Laminate Using Modal Analysis and Strain Energy Method
p.757

Prediction of Elastic Properties of Honeycomb Core Materials and Analysis of Interlaminar Stress of Honeycomb Sandwich Composite Plate
p.763

Bending Performance Analysis of Aluminum-Composite Hybrid Tube Beams
p.769

Effective Thermal Conductivity of Composites Reinforced with Curvilinearly Anisotropic Inclusions with Kapitza Contact Resistance
p.775

Micromechanical Characterization Parameters for a New Failure Criterion for Composite Structures
p.781

HomeKey Engineering MaterialsKey Engineering Materials Vols. 306-308Damage Detection of Surface Crack in Composite...

Damage Detection of Surface Crack in Composite Quasi-Isotropic Laminate Using Modal Analysis and Strain Energy Method

Abstract:

This paper presents a damage detection of surface crack in composite laminate. Carbon/epoxy composite AS4/PEEK was used to fabricate a quasi-isotropic laminate [0/90/±45]2s. Surface crack was created by using laser cutting machine. Modal analysis was performed to obtain the mode shapes of the laminate before and after damage. The mode shapes were then adopted to compute the strain energy, which was used to define a damage index. Consequently, the damage index successfully predicted the location of surface crack in the laminate. Differential quadrature method (DQM) was introduced to calculate the partial differential terms in strain energy formula.

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Periodical:

Key Engineering Materials (Volumes 306-308)

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757-762

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.306-308.757

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Online since:

March 2006

Authors:

Hui Wen Hu, Bor Tsuen Wang, Cheng Hsin Lee

Keywords:

DQM, Modal Analysis, Quasi-Isotropic Laminate, Strain Energy, Surface Crack

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