CAJ | 학술논문

发动机在外场服役过程中传动轴发生断裂故障, 其他多台发动机传动轴在检查中也发现了掉齿和裂纹现象. 利用宏微观分析手段对传动轴的裂纹及断口进行分析研究, 对其断裂模式进行模拟试验和有限元分析. 结果表明: 传动轴断裂性质为弯-扭复合疲劳, 传动轴裂纹呈现螺旋型扩展是由于传动轴载承受正常扭转载荷下叠加了弯曲载荷, 此外,弯矩的存在还改变了传动轴花键上的应力分布.
발동궤재외장복역과정중전동축발생단렬고장, 기타다태발동궤전동축재검사중야발현료도치화렬문현상. 이용굉미관분석수단대전동축적렬문급단구진행분석연구, 대기단렬모식진행모의시험화유한원분석. 결과표명: 전동축단렬성질위만-뉴복합피로, 전동축렬문정현라선형확전시유우전동축재승수정상뉴전재하하첩가료만곡재하, 차외,만구적존재환개변료전동축화건상적응력분포.
The transmission shaft in an aero-engine fractured during service. Other several engine transmission shafts were also found to have failed. In order to find the failure mode and cause, macro and micro observation, simulation tests and finite element analysis were carried out. The results show that the fracture mode of the transmission shaft is bending-tension fatigue. The spiral extension of crack of the transmission shaft was caused by the coeffect of torsion load and bending load. In addition, bending load also changed the stress distribution of the transmission shaft.