New method in experimental damage study of AS4/PEEK composite laminates

Shibin Wang; Jingwei Tong; C. Yue; Linan Li; Min Shen

doi:10.1117/12.470710

18 June 2002 New method in experimental damage study of AS4/PEEK composite laminates

Shibin Wang, Jingwei Tong, C. Yue, Linan Li, Min Shen

Proceedings Volume 4704, Nondestructive Evaluation and Health Monitoring of Aerospace Materials and Civil Infrastructures; (2002) https://doi.org/10.1117/12.470710
Event: NDE For Health Monitoring and Diagnostics, 2002, San Diego, California, United States

Abstract

AS4/PEEK [0/+/- 45/90]_7s composite laminates were subjected to a bending moment. We have obtained the displacement fields by moire interferometry with the aid of Long Distance Microscope. Based on wavelet analysis, the digital moire images were processed and analyzed. The special algorithms of unconstrained nonlinear minimization and the scale parameter were used to eliminate the influence of the noise in the digital image processing. Tension tests were carried out on AS4/PEEK [ 0/+/- 45/90 ]_2s composites. When AS4/PEEK composite laminates were deformed, the images of natural surface of the AS4/PEEK specimen were recorded to study the damage initiation and growth. The experimental results show that the considerable interlaminal stresses between different plies, and these places were more prone to delaminate. The paper presents the microscopic damages and matrix crack growth observed by an optical microscope and the CCD camera.

Citation Download Citation

Shibin Wang, Jingwei Tong, C. Yue, Linan Li, and Min Shen "New method in experimental damage study of AS4/PEEK composite laminates", Proc. SPIE 4704, Nondestructive Evaluation and Health Monitoring of Aerospace Materials and Civil Infrastructures, (18 June 2002); https://doi.org/10.1117/12.470710

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