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三、整体结构的发展 强度和屈服極限的增高一般说来是与缺口敏感性的增加分不开的,这种認識大大有助于发展尽可能无缺口的飞机结构。但在使用屈服極限和强度达不到極限的材料例如合金24S和75S,还需要作进一步研究 就飞机结构未来发展的意义而言,航空科学协会提出了新的课题,并在航空科学杂志上公布过。这个问题的意义在“慧星号”失事后特别引人重视。众所周知,这次失事是因疲劳所引起的。疲劳裂纹多半在机窗框角上铆钉孔附近。这与已講过的力的缺口作用情况有关。 首先致力于较大部件尽可能制成一个整塊,以消除
Third, the overall structural strength of development and the increase of the yield limit are generally inseparable from the increase of the sensitivity of the gap. This understanding has greatly contributed to the development of an aircraft structure that is as seamless as possible. However, in the use of materials such as alloys 24S and 75S which have not reached the limit of yield and strength, there is a need for further study. In the context of the future development of aircraft structures, IAA has proposed new topics and published in the Journal of Aeronautical Science Too The significance of this issue has drawn particular attention after the crash of the “Comet”. As we all know, the crash was caused by fatigue. Mostly fatigue cracks in the window frame near the rivet hole corner. This is related to the role of the gap that has been mentioned. First commit to making larger pieces as large as possible to make one piece, eliminating it