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Three-Wave Mutual-Checking Method for Data Processing of SHPB Experiments of Concrete

Published online by Cambridge University Press:  12 August 2014

T.-T. Wang  and
B. Shang
T.-T. Wang
Affiliation:
School of Mathematics and Physics, Hubei Polytechnic University, Hubei, China
B. Shang*
Affiliation:
School of Mathematics and Physics, Hubei Polytechnic University, Hubei, China
*
*[email protected]
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Abstract

Two-wave methods and Three-wave method are conventional methods to process the SHPB experiment data. Due to the presence of transient waves in dynamic experiments, both the stress and strain fields within a specimen are seldom absolutely uniform. Different date processing methods lead to different results. In this paper, we have developed a program to compare the results getting from different methods. The difference of the strains corresponding to the ultimate stress can reach 20%. Which one is better? One material shouldn't have different constitutive. In order to solve the problem, we have developed Three-wave mutual-checking method, which is based on the conservation of the momentum of the whole system. This method provides a checking mechanism, so some human error can be avoided when process the same experiment data. By this method, different person can obtain the only credible stress-strain curve based on the same test data.

Keywords

SHPBThree-wave mutual-checking methodData processingConcrete
Type
Technical Note
Information
Journal of Mechanics , Volume 30 , Issue 5 , October 2014 , pp. N5 - N10
Copyright
Copyright © The Society of Theoretical and Applied Mechanics, R.O.C. 2014 

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