CAJ | 학술논문

针对某柴油机连杆在疲劳试验中断裂失效，进行了断口分析、应力测试及疲劳强度评估分析。结果表明，该连杆的设计结构强度能够满足使用安全性要求，而螺栓孔螺纹加工质量差，造成局部残余应力和形状应力集中，较大程度上降低了该区域结构的疲劳强度，致使连杆在该部位断裂失效。
침대모시유궤련간재피로시험중단렬실효，진행료단구분석、응력측시급피로강도평고분석。결과표명，해련간적설계결구강도능구만족사용안전성요구，이라전공라문가공질량차，조성국부잔여응력화형상응력집중，교대정도상강저료해구역결구적피로강도，치사련간재해부위단렬실효。
For the fracture failure of diesel engine connecting rod in the fatigue test ,the fracture analysis ,stress test and fa-tigue strength evaluation were carried out .The result shows that the designed structure strength can meet the reliability re-quirement .However ,the residual stress and shape stress concentration caused by the worse machining of screw thread for bolt hole decreases the fatigue strength of fracture largely and finally leads to the fracture failure .