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�������պ����ѧѧ�� 2001, Vol. 27 Issue (2) :167-170    DOI:
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Bend/Twist Coupling Effects of Unsymmetric and Unbalanced Laminate
XU De-wei1, LI Zheng-neng1, CUI De-gang2*
1. Beijing University of Aeronautics and Astronautics, Dept. of Flight Vehicle Design and Applied Mechanics;
2. Science and Technology Bureau of AVIC

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Abstract�� In order to obtain particular twist angle of composite structure, utilizing the coupling effects of unsymmetric&unbalanced laminate is a considerable approach. An unsymmetric&unbalanced laminate is formed by adding a sub-laminate into the symmetric laminate. How to lay the sub-laminate and what the optimal orientation angle of the sub-laminate is are studied in order to make the most use of coupling effects by nonlinear finite element methods. Test results of honeycomb core sandwich composite laminate simulating the wing-box under the load of aerodynamics demonstrate that the calculating results well accord with the test results and unsymmetric&unbalanced laminates have prospective engineering applications.
Keywords�� coupling   composite materials   laminates   unsymmetric and unbalanced laminate   twisting distortion     
Received 1999-10-18;
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���ΰ, ۪����, �޵¸�.�ǶԳƷǾ�������Ť���ЧӦ�о�[J]  �������պ����ѧѧ��, 2001,V27(2): 167-170
XU De-wei, LI Zheng-neng, CUI De-gang.Bend/Twist Coupling Effects of Unsymmetric and Unbalanced Laminate[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2001,V27(2): 167-170
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http://bhxb.buaa.edu.cn//CN/     ��     http://bhxb.buaa.edu.cn//CN/Y2001/V27/I2/167
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