Experimental and numerical study on the effect of strain rate to ductile damage

Bowden, Andrew Scott

Experimental and numerical study on the effect of strain rate to ductile damage

Master Thesis

2009

Publisher

University of Cape Town

Department

Department of Mechanical Engineering

Faculty

Faculty of Engineering and the Built Environment

Abstract

Ductile fracture modelling is extensively used in the automotive, aerospace, aluminium and steel industries. However, these models are often only validated in a limited region of stress states, for example tensile failure by void growth but not shear. In addition, the predictions generally do not include strain rate or temperature effects. Quasistatic tests are often used in calibration, even though many applications such as automotive accidents and ballistic impact operate in the dynamic range. Thus the aims of this thesis were to develop a system to test the damage properties of materials at both quasistatic (â‰ˆ 1 s-Â¹) and dynamic (> 1 x 10Â³s-Â¹) strain rates, and then to determine the innfuence of strain rate to ductile fracture.

Description

Includes bibliographical references (p. 202-208).

Keywords

Mechanical Engineering

Reference:

Collections

Masters

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