CAJ | 학술논문

针对杆杆型动态拉伸试验系统设计了一种新型的楔形卡口试件装卡方式.利用ANSYS/LS-DYNA软件,建立采用该新型试件装卡方式的直接式杆杆动态拉伸系统的三维有限元模型,并进行数值仿真试验.得到的波形与SHB(Split Hopkinson Bar)试验典型波形相符合,得到的动态应力应变曲线与输入材料模型曲线趋势是一致的.利用这种装卡方式对一种2024铝合金进行动态拉伸试验,得到的动态拉伸应力应变曲线与利用SHPB试验得到的动态压缩曲线基本一致,证明这种新型试件装卡方式是有效的.
침대간간형동태랍신시험계통설계료일충신형적설형잡구시건장잡방식.이용ANSYS/LS-DYNA연건,건립채용해신형시건장잡방식적직접식간간동태랍신계통적삼유유한원모형,병진행수치방진시험.득도적파형여SHB(Split Hopkinson Bar)시험전형파형상부합,득도적동태응력응변곡선여수입재료모형곡선추세시일치적.이용저충장잡방식대일충2024려합금진행동태랍신시험,득도적동태랍신응력응변곡선여이용SHPB시험득도적동태압축곡선기본일치,증명저충신형시건장잡방식시유효적.
A new wedge-shaped specimen fastener wasdesigned for Bar-Bar DynamicTensile Apparatus. Using the finite element program ANSES/LS-DYNA, a three-dimensional finite element model for the SHTB with the new specimen fastenerwas established to simulate the Bar-Bar DynamicTensile Test. Typical waveform of SHB (Split Hopkinson Bar) apparatus was obtained, and the simulated stress-strain curves are consistent with the inputted material curve. Using the newspecimen fastener, a 2024 Aluminum alloy dynamic tensile test was performed. Dynamic tensile stress-strain curves are nearly consistent with the dynamic pressure curves come from SHPB test, which proves that the new specimen fastener is feasible and effective.