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Proceedings Paper

Active deformation and engineering analysis of CFRP mirror of various lay-up sequences within quasi-isotropic laminates
Author(s): Chunmei Zeng; Xia Yu; Peiji Guo
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Paper Abstract

A regularization stiffness coefficient method was verified further to optimize lay-up sequences of quasi-isotropic laminates for carbon fiber reinforced polymer (CFRP) composite mirrors. Firstly, the deformation due to gravity of 1G and temperature difference of 20-100°C and the modal were analyzed by finite element method (FEM). Secondly, the influence of angle error of ply stacking on quasi-isotropic of bending stiffness was evaluated. Finally, an active support system of 49 actuators in circular arrangement is designed for a 500mm CFRP mirror, and its goal is to deform the spherical CFRP mirror to a parabolic. Therefore, the response functions of the actuators were gotten, and the surface form errors and stresses were calculated and analyzed. The results show that the CFRP mirrors designed by the method have a better symmetrical bending deformation under gravity and thermal load and a higher fundamental frequency, and the larger n the better symmetry (for π/n quasi-isotropic laminates); the method reduces the sensitivity to misalignment of ply orientation for symmetric bending, and the mirror’s maximum von Mises stress and maximum shear stress are less compared to those laminates not optimized in lay-up sequence.

Paper Details

Date Published: 6 August 2014
PDF: 7 pages
Proc. SPIE 9281, 7th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies, 92810O (6 August 2014); doi: 10.1117/12.2068389
Show Author Affiliations
Chunmei Zeng, Institute of Modern Optical Technologies (China)
Soochow Univ. (China)
Xia Yu, Institute of Modern Optical Technologies (China)
Soochow Univ. (China)
Peiji Guo, Institute of Modern Optical Technologies (China)
Soochow Univ. (China)


Published in SPIE Proceedings Vol. 9281:
7th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies
Li Yang; Eric Ruch; Shengyi Li, Editor(s)

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