Separation of elastic waves in split Hopkinson bars using one-point strain measurements |
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Authors: | S W Park M Zhou |
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Institution: | (1) George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, 30332-0405 Atlanta, GA |
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Abstract: | A method for the analysis of elastic waves in split Hopkinson bars for unlimited time durations is presented. This method
allows the separation of component waves traveling in opposite directions in each bar using the strain history measured at
one point on the bar and a known end condition for it. The method extends the time period for which valid experimental data
can be extracted for a split Hopkinson bar apparatus and eliminates the need for a second independent measurement of the stress
waves required in other methods for such extended analyses. Comparisons with the two-point method, which requires two independent
strain measurements, show good agreement between the two methods. The accuracy and feasibility of the method are demonstrated
through its application to impact experiments on composite laminates. The use of the current method in determining the response
of a fiber-reinforced composite laminate under impact loading is described. |
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Keywords: | elastic waves SHPB one-point method impact feber-reinforced composites |
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