Determination of the Equation of State of Concrete by Ultrasonic Methods

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1999
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Lindgren, Eric
Martin, L.
Rosen, Moshe
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Review of Progress in Quantitative Nondestructive Evaluation
Center for Nondestructive Evaluation

Begun in 1973, the Review of Progress in Quantitative Nondestructive Evaluation (QNDE) is the premier international NDE meeting designed to provide an interface between research and early engineering through the presentation of current ideas and results focused on facilitating a rapid transfer to engineering development.

This site provides free, public access to papers presented at the annual QNDE conference between 1983 and 1999, and abstracts for papers presented at the conference since 2001.

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The development of modeling efforts to simulate the high strain, high strain rate events that occur as a structure is impacted by a projectile requires a large number of variables to accurately determine the behavior of a material under such physical conditions. Amongst the parameters that must be included in such a model is the equation of state, which describes the change in material properties as a function of pressure. For many materials, the equation of state can be obtained by using a shock wave method which requires that the material be subjected to an impact by a metallic plate traveling at very high velocities by means of a gas gun [1]. To obtain meaningful information from such a test, the material that is impacted must plastically deform. Therefore, the testing of brittle materials, such as concrete, yields limited amounts of meaningful data as the samples fail before the completion of the experiment.

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Fri Jan 01 00:00:00 UTC 1999