摘要
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。
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 simulation result of residual compressive stress and the theoretical ones were compared and analyzed, which showed that the actual impact force of pellet was equal to the maximum impact force of simulation, and the same change trend of the residual stress was obtained by the simulation and contact mechanics theory, so the simulation results can be applied to preliminary forecast and analysis to ultrasonic shot peening.
出处
《现代制造工程》
CSCD
北大核心
2014年第3期74-78,91,共6页
Modern Manufacturing Engineering
关键词
超声波
喷丸强化
有限元
冲击力
ultrasonic
shot peening
finite element
impact
