This content is not included in your SAE MOBILUS subscription, or you are not logged in.

On Practical Implementation of the Ramberg-Osgood Model for FE Simulation

Journal Article
2015-01-9086
ISSN: 1946-3979, e-ISSN: 1946-3987
Published January 05, 2016 by SAE International in United States
On Practical Implementation of the Ramberg-Osgood Model for FE Simulation
Topic:
Citation: Gadamchetty, G., Pandey, A., and Gawture, M., "On Practical Implementation of the Ramberg-Osgood Model for FE Simulation," SAE Int. J. Mater. Manf. 9(1):200-205, 2016, https://doi.org/10.4271/2015-01-9086.
Language: English

Abstract:

The three parameter Ramberg-Osgood (RO) method finds popular usage for extracting complete stress-strain curve from limited data which is usually available. The currently popular practice of assuming the plasticity to set in only at the Yield point provides computational advantage by separating the complete nonlinear curve, obtained from RO method, into elastic and plastic regions. It is shown, with an example problem, that serious errors are committed by using this method if one compares the obtained results with results of complete stress-strain curve.
In the present work we propose a simple Taylor series based approach based on RO method to overcome the above deficiency. This method is found to be computationally efficient. The proposed method is applicable for stress-strain curves of materials for which RO method provides a good approximation.