A Parameter Study for the Test Condition of Kolsky Bar Experiment

Abstract:

When the cross-sectional area of the specimen for the Kosky bar experiment (Split Hopkinson bar) is very small compared to the area of the input bar, most stress wave will be reflected and the signal detected by the strain gage attached on the output bar is very weak. The signal to noise ratio is very significant so that smoothing process is necessary to obtain meaningful results. To improve the design of the experiment, 2-dimensional finite element calculations are carried out for various specimen thickness and length and elastic stiffness of the bar. It is found that short specimen with large contact area and bar material with low stiffness give better results.

• Periodical: Applied Mechanics and Materials (Volumes 752-753)
• Pages: 477-480
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.752-753.477
• Online since: April 2015
• Authors: Yoon Sang Kim, Sung Young*
• Keywords: Impedence, Kolsky Bar Experiment, Specimen Geometry

References

[1] W. Chen and B. Song, Split Hopkinson (Kolsky) bar, Springer, New York, (2011).

[2] Y. Young, J.H. Kim and Y.W. Kim, D.T. Chung and T.H. Nam, Sci. Adv. Mater. Vol. 6 (2014), p (2024).

[3] K. Otsuka and C.M. Wayman, Shape Memory Materials, Cambridge University Press, (1999).

[4] Information of ABAQUS on http: /www. 3ds. com/productsservices/simulia.