Tensile mechanical properties by Hopkinson Bar

• Main Author: Chia, Shyh Qin.
• Other Authors: Shu Dong Wei
• Format: Final Year Project
• Language: English
• Published: 2009
• Subjects: DRNTU::Engineering::Mechanical engineering::Mechanics and dynamics
• Online Access: http://hdl.handle.net/10356/15686
• Institution: Nanyang Technological University

N3.2-B2-01, the Strength of Material Laboratory of Nanyang Technological University (NTU) is the venue where the student conducted all the experiments related to this project. There are three kinds of Split Hopkinson bar (SHB) apparatus in the laboratory. They are torsion, compression and Tensile SHB which used to obtain different mechanical properties of various materials under high strain rate. SHB is a very common technique which used to measure the stress-strain response of materials at high strain rate. SHB manages to measure strain rate from 102 to 104s-1 [1].The SHB technique is based on the propagation of longitudinal stress waves in the elastic bars where results of the experiment were obtained by using a Digital Oscilloscope from the Yokogawa Electric Corporation. Comparisons may then be made between the numerical predicted and experimental data. The objective of the project is to ensure the SHB equipment’s accuracy and reliability in testing for other materials. In order to achieve that, the student has to calibrate the tensile Split Hopkinson Bar with standard Aluminum Alloy specimen Al6061-T6 and comparing the calibration result with the literature reviews. The project will also look into the causes and solution of the problems faced during experiment. Several recommendations for the Tensile SHB test will be discussed in order to improve the accuracy and reliability of the Tensile SHB test.