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.
Makeev A, Nikishkov Y, Armanios E. A concept for quantifying equivalent initial flaw size distribution in fracture mechanics based life prediction models[J].International Journal of Fatigue.2007,29:141-145
Moreira P M G P, Matos P F P, Castro P M S T. Fatigue striation spacing and equivalent initial flaw size in Al 2024-T3 riveted specimens[J].Theoretical and Applied Fracture Mechanics.2005,43:89-99
Manning S D, Yang J N. USAF durability design handbook:guidelines for the analysis and design of durable aircraft structures . AFWAL-TR-83-3027, Air Force Wright Aeronautical Laboratories, Wright Patterson Air Force Base, Ohio, 1984
�й������о�Ժ.���÷ɻ�ƣ�����������;�������ֲ�(���Ĳ�):�;������[M].����:�й������о�Ժ,1994:35-54 China Aviation Academy. Handbook of fatigue damage tolerance durability design for aircraft (Vol.4):durability design [M]. Beijing:China Aviation Academy, 1994:35-54(in Chinese)
���ĬE,֣�F��,�ѱ��.���ʶ�����ѧ�������������/�;���[M].����:�������պ����ѧ������, 1999:186-194 Liu Wenting, Zheng Minzhong, Fei Binjun. Probability fracture mechanics and probability damage tolerance / durability[M]. Beijing:Beijing University of Aeronautics and Astronautics Press, 1999:186-194(in Chinese)
���ĬE,��ͮ.�Ľ����;��Է����������������о�[J].�������պ����ѧѧ��2000, 26(6):691-693 Liu Wenting , Liu Tong. Research on improved crack initiation approach of durability analysis [J]. Journal of Beijing University of Aeronautics and Astronautics, 2000, 26(6):691-693