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Proceedings Paper

Residual stresses in unsymmetric laminated carbon fiber composites
Author(s): Yu Liu; Meng Yin Quek; Anand Krishna Asundi
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Paper Abstract

The laminate is constructed so that symmetry about the midplane is not maintained. Upon cooling from the cure temperature, certain plies contract more than their neighbors, inducing residual stresses in this cross-ply laminate. Residual stresses coupled with asymmetries in the laminate produce warpage. Laminated plate theory is used to calculate the residual stresses and warpage. Also, residual stresses are related to the strains released when the hole-drilling technique is applied. In the experiment, high-sensitivity moire interferometry is used together with the hole-drilling method to determine the residual strains. The theoretical and experimental results are in qualitative agreement.

Paper Details

Date Published: 7 May 1999
PDF: 4 pages
Proc. SPIE 3740, Optical Engineering for Sensing and Nanotechnology (ICOSN '99), (7 May 1999); doi: 10.1117/12.347779
Show Author Affiliations
Yu Liu, Nanyang Technological Univ. (Singapore)
Meng Yin Quek, Nanyang Technological Univ. (Singapore)
Anand Krishna Asundi, Nanyang Technological Univ. (Singapore)

Published in SPIE Proceedings Vol. 3740:
Optical Engineering for Sensing and Nanotechnology (ICOSN '99)
Ichirou Yamaguchi, Editor(s)

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