Date of Award

11-7-2015

Degree Type

Thesis

Degree Name

M.A.Sc.

Department

Mechanical, Automotive, and Materials Engineering

First Advisor

Green, Daniel

Keywords

DP600, Hopkinson, Rate, SHPB, Strain, Tensile

Rights

CC BY-NC-ND 4.0

Abstract

This project consisted of designing and developing a split Hopkinson pressure bar (SHPB) apparatus to perform tensile tests on metallic sheet materials at strain rates from 500 s-1 to 2000 s-1. The mechanical components that were designed and built are: a gas gun, incident/transmission bars and a momentum trap. A data acquisition system with two data acquisition cards with a maximum sampling rate of up to60 MS/s was used. This apparatus was successfully assembled, calibrated and tested. A software code was developed to post-process the experimental strain data and determine the corresponding flow curves. The accuracy of this tensile SHPB apparatus was demonstrated by testing DP600 sheet steel specimens in the rolling, diagonal and transverse directions. When compared to published data for the same sheet material tested in a different laboratory, the overall errors were found to be 3.20%, 4.05%, and 3.87% for the rolling, diagonal and transverse directions, respectively.

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