| Numéro |
J. Phys. IV France
Volume 110, September 2003
|
|
|---|---|---|
| Page(s) | 385 - 390 | |
| DOI | https://doi.org/10.1051/jp4:20020724 | |
J. Phys. IV France 110 (2003) 385
DOI: 10.1051/jp4:20020724
New testing techniques to obtain tensile stress-strain curves for a wide range of strain rates
S. Tanimura1, K. Mimura1 and T. Umeda21 Department of Mechanical Systems Engineering, Aichi University of Technology, Gamagori-City, Aichi 443-0047, Japan
2 Division of Mechanical Systems Engineering, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Sakai, Osaka 599-8531, Japan
Abstract
A new method of applying a dynamic load directly to a tensile specimen was developed. By combining the new method with the
testing method based on a sensing block [1-5], we improved the testing method to obtain the entire tensile stress-strain curves
for a wide range of strain rates on the order of
s
-1, with remarkable accuracy, especially for the high strain rates range. Based on numerical simulations and experiments, the
accuracy of the measurement of the non-coaxial Hopkinson bar method [6,7] was discussed. By performing a series of numerical
simulations, the relation between the gauge length of a specimen and the testing strain rate, necessary for obtaining an accurate
dynamic stress-strain curves corresponding to a testing error of approxmatety 2% or 4%, was also obtained for a wide range
of strain ratesfrom 10
-1 to 10
4 s
-1.
© EDP Sciences 2003