Simulation of high strain rate properties of magnesium alloy AZ91D

• Main Author: Song, Zi Hao
• Other Authors: Shu Dong Wei
• Format: Final Year Project
• Language: English
• Published: 2014
• Subjects: DRNTU::Engineering::Mechanical engineering::Kinematics and dynamics of machinery
• Online Access: http://hdl.handle.net/10356/61940
• Institution: Nanyang Technological University

Low density and excellent machinability of Mg alloys make them good candidates for light-weight constructions of components in the engineering industry. Furthermore, they also exhibit much better complex mechanical behavior than more common materials. In this paper, we will focus on the study of mechanical properties of magnesium alloy AZ91D under high strain rate. The software ANSYS Mechanical APDL (LS-DYNA Explicit) was used for the modeling and a finite element simulation of Split Hopkinson Pressure Bar (SHPB) experiment. Split Hopkinson Pressure Bar (SHPB) is one of the most widely used experimental techniques for measuring high strain rate, and compressive stress-strain relationship of various materials. In the experiment, generally it contains strike bar, incident bar, specimen, and transmitter bar. Similarly in the simulation, we will also follow the set up. Striker bar was simulated to impact with different speed and we will get the output of strain rate curve, stress rate curve and stress-strain curve by analyzing the simulated results. In general, higher strain rate and compressive strength of impact are observed for simulation with higher striker bar velocity. Meanwhile, we will do the comparison between the simulation and experimental results.