CAJ | 학술논문

本文利用TSC-1M-4型磁应力集中检测仪对20G管材在循环往复载荷作用下进行实验研究,并对检测结果进行磁记忆信号分析。结果表明,应力集中线过零点并不能判定为试件的应力集中点。随着疲劳载荷加载力的减小,构件濒临破坏和达到破坏时的漏磁场梯度值也会随之增大。在应力集中区,20G管材的漏磁场梯度值达到12A/（m.mm）已处于频临破坏的状态,在达到23A/（m.mm）左右时,试件会有明显的疲劳裂纹产生。
본문이용TSC-1M-4형자응력집중검측의대20G관재재순배왕복재하작용하진행실험연구,병대검측결과진행자기억신호분석。결과표명,응력집중선과영점병불능판정위시건적응력집중점。수착피로재하가재력적감소,구건빈림파배화체도파배시적루자장제도치야회수지증대。재응력집중구,20G관재적루자장제도치체도12A/（m.mm）이처우빈림파배적상태,재체도23A/（m.mm）좌우시,시건회유명현적피로렬문산생。
Magnetic stress concentration detector TSC-1M-4 was used to test 20G tubular product,and signal processing software was used to analyse test results under periodic loading.The results showed that the line of stress concentration is zero,which could not judge the point as stress concentration.Coupled with the reduction of fatigue load loading force,when component was on the brink of destruction or achieves the destroyed point,leakage magnetic field gradient value would increase.In the area of stress concentration,20 G tubular product leakage magnetic field gradient value up to 12 A /（m·mm）specimen was already in the state of the damage.When the value reached 23 A/（m·mm）,significant fatigue crack of specimen would appear.