CAJ | 학술논문

为了研究焊接区位置对结构疲劳性能的影响,本文对焊接结构连接件进行了疲劳试验,并进行了有限元分析及寿命预测.结果发现,焊接区与其它应力集中区会发生应力耦合效应,进而降低结构的疲劳寿命.焊缝位置越远离其他应力集中区,焊缝应力越小;当焊缝与其他应力集巾区距离大于焊缝宽度的8倍时,耦合效应消失.在耦合区内.疲劳寿命与焊缝距离近似呈线性关系.
위료연구한접구위치대결구피로성능적영향,본문대한접결구련접건진행료피로시험,병진행료유한원분석급수명예측.결과발현,한접구여기타응력집중구회발생응력우합효응,진이강저결구적피로수명.한봉위치월원리기타응력집중구,한봉응력월소;당한봉여기타응력집건구거리대우한봉관도적8배시,우합효응소실.재우합구내.피로수명여한봉거리근사정선성관계.
The fatigue test was carried out on welded structure to analyze the effects ofposition of the welding zone on the fatigue performance.The structure was analyzed by finite element method and its fatigue life was predicted after the test.The results show that the coupling effect between the welding zone and other stress concentration zone can be observed,which decreases the fatigue life of the structure.The stress of the welding zone decreases with the increase of the distance between the welding zone and other stress concentration zone.The coupling effect vanishes when the value of welding seam reaches 8 times ofthe width of the welding zone.Within the range of coupling,the fatigue life exhibits linear relationship with the welding seam distance.