Some Multiaxial Viscoplastic Experiments: Relation to Tensor Functions

Part of the Advances in Mechanics and Mathematics book series (AMMA, volume 20)

The aim of the chapter on experiments is to find as simple a relationship as possible between fundamental invariants of stress, plastic strain and plastic strain rate (usually called equivalent plastic strain, equivalent plastic strain rate and equivalent von Mises stress). It would be desirable that the results lead perpetually to the so-called unique flow curve connecting equivalent stress and equivalent strain for a fixed strain rate and diverse stress trajectories. Such curves have been used extensively for numerical purposes like in FEM codes. In order to be objective as much as possible, no constitutive assumption concerning flow rule is introduced throughout the first part of this chapter.

Then the two constitutive models are calibrated comparing plastic stretching tensors, calculated from their evolution equations, with their experimentally found values. This would clarify admissibility of evolution equations in FEM codes. Experiments were performed in the dynamic testing laboratory of JRC-Ispra, Italy, with specimens made of austenitic stainless steel AISI 316.


Plastic Strain High Strain Rate Equivalent Stress Plastic Strain Rate Tensor Function 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

Copyright information

© Springer-Verlag New York 2009

Authors and Affiliations

  1. 1.Mechanical EngineeringMarkovic UniversityKragujevacSerbia

Personalised recommendations