TY - JOUR
T1 - Assessment of delamination in composite beams using shear horizontal (SH) wave mode
AU - Su, Zhongqing
AU - Yang, Chunhui
AU - Pan, Nan
AU - Ye, Lin
AU - Zhou, Li-Min
PY - 2007
Y1 - 2007
N2 - Interaction of Lamb waves with structural damage can lead to wave mode conversion. In this study, the shear horizontal (SH) wave, from the mode conversion of the fundamental symmetric Lamb wave (S0), was used for quantitative identification of delamination in composite beams, based on advanced signal processing using an inverse approach. SH wave propagation under various delamination conditions in CF/EP beams made of orthotropic plain woven fabrics was simulated, and signal characteristics were extracted in terms of the concept of digital damage fingerprints (DDF). With the aid of an artificial neural algorithm, the relation between the DDF of delamination-scattered SH mode and damage parameters was calibrated, whereby the occurrence, location and size of delamination in the composite beams were assessed. The approach was experimentally validated, and the results demonstrate the effectiveness of SH mode for quantitative damage evaluation of composite structures.
AB - Interaction of Lamb waves with structural damage can lead to wave mode conversion. In this study, the shear horizontal (SH) wave, from the mode conversion of the fundamental symmetric Lamb wave (S0), was used for quantitative identification of delamination in composite beams, based on advanced signal processing using an inverse approach. SH wave propagation under various delamination conditions in CF/EP beams made of orthotropic plain woven fabrics was simulated, and signal characteristics were extracted in terms of the concept of digital damage fingerprints (DDF). With the aid of an artificial neural algorithm, the relation between the DDF of delamination-scattered SH mode and damage parameters was calibrated, whereby the occurrence, location and size of delamination in the composite beams were assessed. The approach was experimentally validated, and the results demonstrate the effectiveness of SH mode for quantitative damage evaluation of composite structures.
KW - damage detection
KW - delamination
KW - lamb waves
KW - neural networks (computer science)
UR - http://handle.westernsydney.edu.au:8081/1959.7/uws:44279
U2 - 10.1016/j.compscitech.2006.08.019
DO - 10.1016/j.compscitech.2006.08.019
M3 - Article
SN - 0266-3538
VL - 67
SP - 244
EP - 251
JO - Composites Science and Technology
JF - Composites Science and Technology
IS - 2
ER -