CAJ | 학술논문

根据气动辅助超声喷丸强化试验的要求和特点，设计制造了试验用超声变幅杆和气丸混合室以及其他辅助装置，验证了新型喷丸方式的可行性。利用压力测试系统实测弹丸的最大冲击力，应用LS-DYNA软件对单颗弹丸冲击工件的过程进行有限元仿真，对残余压应力仿真结果与理论结果进行对比分析。结果表明：弹丸的实际冲击力与仿真最大压力相当，仿真和接触力学理论得到的残余应力变化趋势相同，仿真结果可以用于对超声喷丸进行初步的预测和分析。
근거기동보조초성분환강화시험적요구화특점，설계제조료시험용초성변폭간화기환혼합실이급기타보조장치，험증료신형분환방식적가행성。이용압력측시계통실측탄환적최대충격력，응용LS-DYNA연건대단과탄환충격공건적과정진행유한원방진，대잔여압응력방진결과여이론결과진행대비분석。결과표명：탄환적실제충격력여방진최대압력상당，방진화접촉역학이론득도적잔여응력변화추세상동，방진결과가이용우대초성분환진행초보적예측화분석。
A test amplifying rod and pill mixing chamber and other auxiliary devices were designed and manufactured according to the requirements and characteristics of pneumatic auxiliary ultrasonic shot peening strengthening test .And then the feasibility of the new shot peening way was also verified .The maximum impact force of pellets was practically measured by pressure test system and a finite element simulation was processed to the course of a single pellet impacting by using software LS -DYNA.The simula-tion result of residual compressive stress and the theoretical ones were compared and analyzed ,which showed that the actual im-pact force of pellet was equal to the maximum impact force of simulation ,and the same change trend of the residual stress was ob-tained by the simulation and contact mechanics theory ,so the simulation results can be applied to preliminary forecast and analy-sis to ultrasonic shot peening .