Dynamic Tensile and Compressive Behaviors of Mild Steel at Wide Range of Strain Rates
Publication: Journal of Engineering Mechanics
Volume 139, Issue 9
Abstract
The purpose of the present paper is to investigate the mechanical behavior of mild steel at quasi-static () and different rates of dynamic tensile () and compressive () strain rates. Quasi-static experiments are conducted on a universal testing machine to study the stress-strain behavior of mild steel. A hydropneumatic machine and a modified Hopkinson bar are used to investigate the dynamic tensile behavior of mild steel specimens at medium and high strain rates, respectively, whereas the specimens are tested on a split Hopkinson pressure bar to acquire understanding of the strain rate sensitivity of mild steel under dynamic compression. The effects of a pulse shaper and gauge length of the specimen in the dynamic compression tests are investigated. High-speed photography has been used to monitor the deformation of the specimen at high strain rate experiments. The applicability of the existing Cowper-Symonds and Johnson-Cook material models to represent the mechanical behavior of mild steel in a plastic zone is examined. Finally, the fractographs of the tested tensile specimens are studied using a scanning electron microscope.
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Acknowledgments
The authors thank D. Forni and M. Dotta of the DynaMat Laboratory, University of Applied Sciences of Southern Switzerland, for help in some experiments. The research was financially supported by the Indo-Swiss Joint Research Program sponsored by the Department of Science and Technology of India and the Swiss State Secretariat of Education and Research of Switzerland.
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Information & Authors
Information
Published In
Journal of Engineering Mechanics
Volume 139 • Issue 9 • September 2013
Pages: 1197 - 1206
Copyright
© 2013 American Society of Civil Engineers.
History
Received: Mar 25, 2012
Accepted: Oct 10, 2012
Published online: Aug 15, 2013
Published in print: Sep 1, 2013
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