期刊
COMPOSITES PART B-ENGINEERING
卷 92, 期 -, 页码 167-174出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesb.2016.02.016
关键词
Non-destructive testing; Hybrid; Polymer-matrix composites (PMCs); Impact behaviour; Terahertz imaging
资金
- Conseil Regional de Lorraine
- Fonds Europeen de Developpement Regional (FEDER)
Terahertz imaging is applied to characterize a hybrid fiber-reinforced composite laminate subject to low velocity impact in this study. The hybrid fiber-reinforced composite laminate comprises unidirectional glass/epoxy and carbon/epoxy plies with a cross-ply stack pattern. Both impact-induced intra- and inter-laminar damages are successfully detected, and the damage evolution throughout the thickness is also evaluated. The interaction between the terahertz polarization and carbon-fiber orientation is investigated in detail. Inter-laminar damage at the interface and the intra-laminar damage close to the same interface can be differentiated via polarization-resolved imaging. With a parameter fitting method based on multiple regression analysis, delamination is characterized quantitatively. Terahertz C- and B-scan images clearly exhibit the propagation of the damage from the top to the bottom surface in three dimensions. (C) 2016 Elsevier Ltd. All rights reserved.
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