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

被引：2

作者：

Wang, SB ^{[1
]}

Tong, JW ^{[1
]}

Yue, C ^{[1
]}

Li, LA ^{[1
]}

Shen, M ^{[1
]}

机构：

[1] Tianjin Univ, Dept Mech, Tianjin 300072, Peoples R China

来源：

NONDESTRUCTIVE EVALUATION AND HEALTH MONITORING OF AEROSPACE MATERIALS AND CIVIL INFRASTRUCTURES | 2002年 / 4704卷

关键词：

composite laminates; damage; displacement; wavelet analysis; moire interferometry; digital image;

D O I：

10.1117/12.470710

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

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.

引用

页码：69 / 73

页数：5

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