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�������պ����ѧѧ�� 2007, Vol. 33 Issue (07) :826-829    DOI:
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Optimization of loading trajectory for skin stretch forming process
Zhang Yanmin, Zhou Xianbin*
School of Mechanical Engineering and Automation, Beijing University of Aeronautics and Astronautics, Beijing 100083, China

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Abstract�� Loading trajectory is the key factor in skin stretch forming. First the loading trajectory of double curve skin was designed through the analytic method, then the parameters were changed to the machine-s instructions which were used as design variables. The method of combining finite element analysis and optimization algorithms was proposed to acquire the reasonable loading trajectory. Optimization mathematics model was set up in order to reduce springback and improve the fittability. The reasonable loading trajectory was found through the numerical simulation and sequential quadratic programming optimization algorithm under the restrictive of maximal thickness strain. Experiment was done according to the reasonable loading trajectory. Both numerical simulation and experiment results show that the precision, strain distributing and thickness uniformity of skin are improved greatly.
Keywords�� aircraft skin   stretch forming   loading trajectory   optimization   numerical simulation     
Received 2006-06-28;
Fund:

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About author: ������(1970-),Ů,�ӱ��޼���,��ʿ��,zhangmin70@eyou.com.
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������, ���ͱ�.�ɻ���Ƥ������μ��ع켣��Ƽ��Ż�[J]  �������պ����ѧѧ��, 2007,V33(07): 826-829
Zhang Yanmin, Zhou Xianbin.Optimization of loading trajectory for skin stretch forming process[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2007,V33(07): 826-829
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