SHPB Experiment And Simulation For Aeronautic Titanium Alloys Under High Strain Rates

TC4（Ti-6Al-4V）featured with high specific strength, high temperatureendurance, corrosion endurance and small heat conductivity has been employed in awide variety of aviation industry. It has been the key point that the mechanicsproperty of TC4is studied under high strain rate and high temperature conditions inthe way of FEA. SHPB based on the theory of one-dimension stress wave has beenemployed to explore the relationship betweenstrain and stress. In this paper, I studiedthe mechanics property of TC4on the SHPB experiment. ABAQUS is a powerfulFEA software. In this paper, a3D FE model was established using ABAQUS Explicitto simulate the process of SHPB.The details of the research include:(1) In this paper, the SHPB experiment for TC4was taken under the conditionswhose strain rates were controlled from2500s-1to4000s-1and temperatures werefrom20℃to900℃with the temperature controlling equipment and the quasi-staticcompression was employed under the conditions whose strain rate was0.01s-1andtemperatures were from20℃to900℃. The relationship between stress and strainwas obtained under the variety of strain rates and temperatures. The conclude wasobtained that the yield stress was lowed as the temperatures rises of the aviationtitanium alloy TC4at the same strain rate. And the stress rises as when the strain rategoes up.(2) Matlab and GA algorithm was employed to calculate the options of J-Cmodule for the aviation titanium alloy TC4with the program and objective functioncreated by author. The verification between the experiments and the numericalmodules was also carried out.(3) The FEM of SHPB experiment for the aviation titanium alloy TC4wasestablished with the software ABAQUS. The comparison was placed between theresult of the experiment and simulation. Study shows that FEM with the J-C moduleconcluded before can reflect the mechanical property of TC4in the range oftemperature from20℃to900℃and strain rate from0.01-1sto4000s-1.