Hostname: page-component-cd9895bd7-gbm5v Total loading time: 0 Render date: 2024-12-22T15:45:17.455Z Has data issue: false hasContentIssue false
  • English
  • Français

Strain Rate Changes During The Tensile Test

Published online by Cambridge University Press:  04 July 2016

R. K. Penny
R. K. Penny*
Affiliation:
University Engineering Department, Cambridge
Get access Rights & Permissions [Opens in a new window]

Extract

Rates of straining that are met in various engineering parts vary considerably from the very small values appropriate to creep to those amounts many orders of magnitude higher that are necessary during metal working processes. If laboratory testing is to follow the ideas of Taira on creep or McLellan on the effects of strain rate on the Ramberg-Osgood constituitive relationships it is necessary to enquire whether conventional testing procedures are adequate. Bodner and Rosen have shown that the phenomenon of discontinuing yielding is solely a function of a testing procedure which allows strain rate changes because of the interaction of specimen stiffness changes and the machine stiffness.

Type
Technical Notes
Information
The Aeronautical Journal , Volume 71 , Issue 684 , December 1967 , pp. 853 - 854
Copyright
Copyright © Royal Aeronautical Society 1967

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1.Taira, S., Tanaka, K. and Ohji, K.A Mechanics of Deformation of Metals at High Temperatures with Special Reference to the Tension Test and the Creep Test. Bull Japanese Soc Mech Eng, Vol 3, No 10, p 228, 1960.Google Scholar
2.McLellan, Dale L.Constitutive Equations for Mechanical Properties of Structural Materials. AIAA Journal, Vol 5, No 3, p 446, 1967.Google Scholar
3.Bodner, S. R. and Rosen, A.Discontinuous Yielding of Commercially Pure Aluminium. J Mech Phys Solids, Vol 15, No l, p 63, 1967.Google Scholar
4.Baron, H. G.Stress /Strain Curves of Some Metals and Alloys. J Inst Iron and Steel, Vol 182, p 354, 1956.Google Scholar
5.Hamstead, M. A. and Gnxis, P. P.Effective Strain Rates in Low Speed Uniaxial Tension Tests. ASTM, Materials Research and Standards, Vol 6, No 11, p 569, 1966.Google Scholar
6.Penny, R. K., Ellison, E. G. and Webster, A. G.Specimen Alignment and Strain Measurement in Axial Creep Tests. ASTM, Materials Research and Standards, Vol 6, No 2, 1966.Google Scholar