Tensile pulse generation techniques in a split Hopkinson Bar

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Authors
Acosta, Juan Felipe
Keshavanarayana, Suresh R.
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Issue Date
2009-05-01
Type
Conference paper
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Research Projects
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Citation
Acosta, J. F. and Keshavanarayana, S.R.(2009). Tensile Pulse Generation Techniques in a Split Hopkinson Bar. In Proceedings: 5th Annual Symposium: Graduate Research and Scholarly Projects. Wichita, KS: Wichita State University, p. 70-71
Abstract

Experimental testing in a tensile Split Hopkinson Pressure Bar showed that the generated tensile pulse using a transfer flange methodology differs from the theoretical prediction. Flange attachment technique to incident bar and flange dimensions distort pulse shape and alter pulse width. Secondary pulses are introduced that hinder the calibration of the testing apparatus and its application to recovery experiments to study history effects. Lagrange diagrams are used to visualize pulse propagation and to identify secondary pulses sources. Geometrical parameters that hinder a proper generation and transfer of the loading pulse are identified and the effect on pulse characteristics is quantified using an Ls-Dyna explicit finite element model.

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Description
Paper presented to the 5th Annual Symposium on Graduate Research and Scholarly Projects (GRASP) held at the Hughes Metropolitan Complex, Wichita State University, May 1, 2009.
Research completed at the Department of Aerospace Engineering, College of Engineering
Publisher
Wichita State University. Graduate School
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GRASP
v.5
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