CAJ | 학술논문

多位置损伤( Multiple Site Damage,MSD)是老龄飞机在服役期间的一种重要损伤形式,其典型结构表现为含孔边裂纹的有限板结构。文章对典型MSD结构进行了疲劳试验研究,旨在通过观察其裂纹扩展和疲劳寿命的情况,得到一系列具有工程应用价值的结论。试验结果表明,多位置损伤会使结构剩余强度明显降低、裂纹扩展寿命显著缩短,对飞机结构的安全性形成极大威胁,认识MSD的裂纹扩展规律有着重要的理论意义和工程实用价值。
다위치손상( Multiple Site Damage,MSD)시노령비궤재복역기간적일충중요손상형식,기전형결구표현위함공변렬문적유한판결구。문장대전형MSD결구진행료피로시험연구,지재통과관찰기렬문확전화피로수명적정황,득도일계렬구유공정응용개치적결론。시험결과표명,다위치손상회사결구잉여강도명현강저、렬문확전수명현저축단,대비궤결구적안전성형성겁대위협,인식MSD적렬문확전규률유착중요적이론의의화공정실용개치。
Multiple site damage ( MSD ) is one of the important characters of aging aircraft subjected to long-term fatigue, and its typical structure is finite plate containing several hole-edge cracks. This paper used fatigue test method on typical MSD structures to observe the phenomenon of crack propagation, to anal-ysis the result of the crack propagation and obtain a series of valuable conclusions. The test results show that MSD structures would obviously reduce the residual strength, shorten the crack growth life and debase the safety capacity. However, understanding the crack propagation law of MSD structure has important theory significance and practical value.