An Experimental Study of Self-diagnosis of Interlaminar Damage in Carbon-fiber Composites

Author:

Ngabonziza Y.1,Ergun H.2,Kuznetsova R.1,Li J.3,Liaw B.M.1,Delale F.1,Chung J.H.4

Affiliation:

1. Mechanical Engineering Department, The City College of New York, CUNY Convent Avenue and 138th Street, New York, NY 10031, USA

2. Civil Engineering Faculty, Mechanics Division, Istanbul Technical University, 34469, Maslak, Istanbul, Turkey

3. Mechanical Engineering Department, The City College of New York, CUNY Convent Avenue and 138th Street, New York, NY 10031, USA,

4. Global Contour Ltd., 104 W. Kaufman, Ste. 103, Rockwall, TX 75087-3032, USA

Abstract

An experimental study was conducted to sense interlaminar delamination in carbon-fiber composites utilizing inherent material piezoresistivity. Mode I and II interlaminar fracture tests were carried out on double cantilever beam and end-notched-flexure specimens following ASTM standards. The traditional DC-sourcing two-point probe technique was employed to measure the through-thickness electrical resistance change. For comparison, optical marker method and acoustic emission technique were also applied to detect interlaminar crack growth. The investigation demonstrates the application potential of the self-sensing capabilities of carbon-fiber composites for structural health monitoring.

Publisher

SAGE Publications

Subject

Mechanical Engineering,General Materials Science

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