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�������պ����ѧѧ�� 2008, Vol. 34 Issue (04) :386-390    DOI:
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Durability analysis technology and application when loading spectrum is altered
Dong Yanmin, Liu Wenting*
School of Aeronautic Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China

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Abstract�� In order to satisfy the requirements on durability evaluation of aircraft structure full scale fatigue (durability) testing when loading spectrum is altered, based on probability fracture mechanics approach and improved crack initiation approach of durability analysis, a method was presented to establish equivalent initial flaw size distributing that describes structural detail initial fatigue quality using all durability testing date under different load spectrums, and an accumulated damage method was presented to calculate crack exceeded probability in every stress district when loading spectrum is altered. Then a durability evaluation approach that can exactly predict structure economy life when loading spectrum is altered was presented. It has a great value and has been successfully applied for the durability evaluation of some aircraft structure full scale fatigue testing when loading spectrum is altered.
Keywords�� aircraft structure   durability   fatigue testing   fracture mechanics   loading spectrum     
Received 2007-04-06;
About author: ������(1982-),��,�ӱ��е���,��ʿ��,dymin@ase.buaa.edu.cn.
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������, ���ĬE.����غ�������µ��;��Է���������Ӧ��[J]  �������պ����ѧѧ��, 2008,V34(04): 386-390
Dong Yanmin, Liu Wenting.Durability analysis technology and application when loading spectrum is altered[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2008,V34(04): 386-390
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http://bhxb.buaa.edu.cn//CN/     ��     http://bhxb.buaa.edu.cn//CN/Y2008/V34/I04/386
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