Carbon fiber reinforced plastic (CFRP) laminate is very sensitive to an impact. Even a low impact creates a delamination, which deteriorates the compression strength of the laminate. Monitoring for delamination is indispensable to maintain the reliability of CFRP structures. Electric potential change method (EPCM) has been applied for CFRP as a nondestructive testing method although it has not yet been reported for the successful application to a quasi-isotropic CFRP laminate which is commonly used for various applications. Strong electrical anisotropy and inhomogenity of the laminate makes simple application of the method difficult. In this paper, a new concept was introduced to resolve the problem of the conventional method. The new method utilizes the piezoresistivity of CFRP woven fabric. Variation of strain on laminate surface due to delamination was measured as electric potential change of CFRP woven fabric. As CFRP woven fabric is generally stacked on the laminate on purpose to protect laminate surface, no additional sensor is required in the method. Delaminations were estimated from the electric potential changes as an inverse problem. Finite element studies were performed to investigate the applicability of the method. The simulation results indicated the validity of the method for delamination identification in quasi-isotropic CFRP laminate.
Skip Nav Destination
ASME 2008 Pressure Vessels and Piping Conference
July 27–31, 2008
Chicago, Illinois, USA
Conference Sponsors:
- Pressure Vessels and Piping
ISBN:
978-0-7918-4828-9
PROCEEDINGS PAPER
Delamination Identification in Quasi-Isotropic CFRP Laminate Using Electric Potential Technique
Masahito Ueda,
Masahito Ueda
Nihon University, Tokyo, Japan
Search for other works by this author on:
Akira Todoroki,
Akira Todoroki
Tokyo Institute of Technology, Tokyo, Japan
Search for other works by this author on:
Yasuyuki Kato
Yasuyuki Kato
Nihon University, Tokyo, Japan
Search for other works by this author on:
Masahito Ueda
Nihon University, Tokyo, Japan
Akira Todoroki
Tokyo Institute of Technology, Tokyo, Japan
Yasuyuki Kato
Nihon University, Tokyo, Japan
Paper No:
PVP2008-61451, pp. 173-178; 6 pages
Published Online:
July 24, 2009
Citation
Ueda, M, Todoroki, A, & Kato, Y. "Delamination Identification in Quasi-Isotropic CFRP Laminate Using Electric Potential Technique." Proceedings of the ASME 2008 Pressure Vessels and Piping Conference. Volume 5: High Pressure Technology; Nondestructive Evaluation Division; Student Paper Competition. Chicago, Illinois, USA. July 27–31, 2008. pp. 173-178. ASME. https://doi.org/10.1115/PVP2008-61451
Download citation file:
9
Views
Related Proceedings Papers
Related Articles
Double Cantilever Beam Measurement and Finite Element Analysis of Cryogenic Mode I Interlaminar Fracture Toughness of Glass-Cloth/Epoxy Laminates
J. Eng. Mater. Technol (April,2001)
New Fatigue Data for Wind Turbine Blade Materials
J. Sol. Energy Eng (November,2003)
Thermomechanical Stress Analysis of Multi-Layered Electronic Packaging
J. Electron. Packag (March,2003)
Related Chapters
Low Velocity Impact Analysis of Anisotropic Composite Laminates with Ellastically Restrained Edges
Proceedings of the 2010 International Conference on Mechanical, Industrial, and Manufacturing Technologies (MIMT 2010)
STRUCTURAL RELIABILITY ASSESSMENT OF PIPELINE GIRTH WELDS USING GAUSSIAN PROCESS REGRESSION
Pipeline Integrity Management Under Geohazard Conditions (PIMG)
Introduction
Computer Vision for Structural Dynamics and Health Monitoring