Conference proceeding
Fast inverse identification of delamination of E-glass/epoxy laminated composite panels
Proceedings of SPIE, Vol.7294(1), pp.72940H-72940H-12
Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security 2009
03/26/2009
Handle:
https://hdl.handle.net/2376/113346
Abstract
In this paper, a novel vibration-based methodology for fast inverse identification of delamination in E-glass/epoxy composite panels has been proposed with experimental demonstration using a scanning laser vibrometer (SLV). The methodology consists of 1) a parameter subset selection for delamination damage localization and 2) iterative inverse eigenvalue analysis for damage quantification. It can potentially lead to a functional formulation relating spatial and global damage indices such as curvature damage factor to local damage parameters. The functional relationship will be suitable to fast or real-time in-situ delamination damage identification. To accomplish the objectives, a shear-locking free higher-order finite element model has been combined with a micromechanics theory-based continuum damage model as an identification model for locating delamination. Applications of the proposed methodology to an Eglass/ epoxy panel [CSM/UM1208/3 layers of C1800]s = [CSM/0/(90/0)3]s with delamination have been demonstrated both numerically and experimentally using a piezoelectric actuator, a PVDF sensor and non-contact measuring SLV. Experimental modal analysis has been successfully conducted using the sample specimen to demonstrate the proposed methodology.
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Details
- Title
- Fast inverse identification of delamination of E-glass/epoxy laminated composite panels
- Creators
- Gun-Jin Yun - Univ. of Akron (USA)Shen Shang - Univ. of Akron (USA)Pizhong Qiao - Washington State Univ. (USA)
- Publication Details
- Proceedings of SPIE, Vol.7294(1), pp.72940H-72940H-12
- Conference
- Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security 2009
- Academic Unit
- Civil and Environmental Engineering, Department of
- Identifiers
- 99900547965101842
- Language
- English
- Resource Type
- Conference proceeding