Evaluation of micro-damage accumulation in holed plain-woven CFRP composite under fatigue loading

Jia Ying; Masaaki Nishikawa; Masaki Hojo

doi:10.1117/12.2044870

9 March 2014 Evaluation of micro-damage accumulation in holed plain-woven CFRP composite under fatigue loading

Jia Ying, Masaaki Nishikawa, Masaki Hojo

Author Affiliations +

Proceedings Volume 9063, Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security 2014; 90631X (2014) https://doi.org/10.1117/12.2044870
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2014, San Diego, California, United States

Abstract

Fluorescence method was used to detect the micro-damage caused by fatigue in a plain-woven carbon fiber reinforced polymer (CFRP). Fluorescence measurement is a method which estimates micro-damage by measuring fluorescent intensity change inside materials. The principle is, larger micro-damage means larger plastic strain, thus more space in that damaged spot which allows more fluorescent dyes coming in the material. By detecting fluorescent intensity in CFRP layer by layer using confocal laser microscopy, micro-damage can be estimated. Results show that there’s a good relationship between micro-damage and fluorescent intensity gradient.

Citation Download Citation

Jia Ying, Masaaki Nishikawa, and Masaki Hojo "Evaluation of micro-damage accumulation in holed plain-woven CFRP composite under fatigue loading", Proc. SPIE 9063, Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security 2014, 90631X (9 March 2014); https://doi.org/10.1117/12.2044870

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