International Journal of Vehicle Structures and Systems

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Experimental Investigation of Failure Mechanisms in GFRP Lap Joint Using Acoustic Emission


Affiliations
1 Aeronautical Engineering Department, Hindustan University, Chennai, India
2 Aeronautical Engineering Department, Madras Institute of Technology, Anna University, Chennai, India
     

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In this paper, Acoustic Emission (AE) based damage mode identification of Glass Fibre Reinforced Plastic (GFRP) lap joints is detailed using laboratory scale experiments. Bonded single lap joint specimens are fabricated from GFRP laminates. These specimens are subjected to tensile test with on-line AE monitoring. The study of failure mechanisms is facilitated by the choice of different oriented lap joint specimens in which one or two such mechanisms predominate. Range of peak frequencies in each orientation is investigated using frequency analysis. Fast Fourier Transforms enabled calculating the frequency content of each damage mechanism. Parametric plots are used to discriminate the different stages of occurrence of failure mechanism in lap joints. Results have shown that predominate of failure modes in each orientation is used as a key in the study of discrimination of failure modes from AE data in lap joints.

Keywords

Composites, GFRP, Lap Joint, Acoustic Emission, Failure Modes.
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  • Experimental Investigation of Failure Mechanisms in GFRP Lap Joint Using Acoustic Emission

Abstract Views: 251  |  PDF Views: 2

Authors

R. Asokan
Aeronautical Engineering Department, Hindustan University, Chennai, India
M. Dinesh
Aeronautical Engineering Department, Madras Institute of Technology, Anna University, Chennai, India
R. Santosh
Aeronautical Engineering Department, Madras Institute of Technology, Anna University, Chennai, India
V. Arumugam
Aeronautical Engineering Department, Madras Institute of Technology, Anna University, Chennai, India
Joseph A. Stanley
Aeronautical Engineering Department, Hindustan University, Chennai, India

Abstract


In this paper, Acoustic Emission (AE) based damage mode identification of Glass Fibre Reinforced Plastic (GFRP) lap joints is detailed using laboratory scale experiments. Bonded single lap joint specimens are fabricated from GFRP laminates. These specimens are subjected to tensile test with on-line AE monitoring. The study of failure mechanisms is facilitated by the choice of different oriented lap joint specimens in which one or two such mechanisms predominate. Range of peak frequencies in each orientation is investigated using frequency analysis. Fast Fourier Transforms enabled calculating the frequency content of each damage mechanism. Parametric plots are used to discriminate the different stages of occurrence of failure mechanism in lap joints. Results have shown that predominate of failure modes in each orientation is used as a key in the study of discrimination of failure modes from AE data in lap joints.

Keywords


Composites, GFRP, Lap Joint, Acoustic Emission, Failure Modes.



DOI: https://doi.org/10.4273/ijvss.4.2.03