Strain-Rate Effect on the Tensile Behaviour of High Strength Alloys


Article Preview

In this paper the first results of the mechanical characterization in tension of two high strength alloys in a wide range of strain rates are presented. Different experimental techniques were used for different strain rates: a universal machine, a Hydro-Pneumatic Machine and a JRC-Split Hopkinson Tensile Bar. The experimental research was developed in the DynaMat laboratory of the University of Applied Sciences of Southern Switzerland. An increase of the stress at a given strain increasing the strain-rate from 10-3 to 103 s-1, a moderate strain-rate sensitivity of the uniform and fracture strain, a poor reduction of the cross-sectional area at fracture with increasing the strain-rate were shown. Based on these experimental results the parameters required by the Johnson-Cook constitutive law were determined.



Edited by:

Ezio Cadoni and Marco di Prisco






E. Cadoni et al., "Strain-Rate Effect on the Tensile Behaviour of High Strength Alloys", Applied Mechanics and Materials, Vol. 82, pp. 124-129, 2011

Online since:

July 2011




[1] C. Albertini, M. Montagnani, Testing techniques based on the split Hopkinson bar, Institute of Physics Conference series No 21, 1974, pp.22-32, London.

[2] C. Albertini, M. Montagnani, in: Journal NED 37, (1976), pp.115-124.

[3] R.M. Davis, A critical study of the Hopkinson bar, Cambridge Univ. Press, 240, (1948), p.375.

[4] H. Kolsky, An investigation of the mechanical properties of materials at very high rates of loading, Proc. Phys. Soc. sect. B62, pp.676-700, (1949).

DOI: 10.1088/0370-1301/62/11/302

[5] U.S. Lindholm, High strain rate tests, Techniques of metal research vol. 5 part 1, Ed. J. Wiley, 1971. 10.

[6] Johnson, G.J., Cook, W.H. A constitutive model and data for metals subjected to large strains, high strain rates and high temperatures. Proceedings of the Seventh International Symposium on Ballistics, The Hague, 1983, p.541–547.

In order to see related information, you need to Login.