An extended elastic law to represent non-linear elastic behaviour: Application in computational metal forming

作者：Mendiguren Joseba^*; Trujillo Juan J; Cortes Fernando; Galdos Lander

来源：International Journal of Mechanical Sciences, 2013, 77: 57-64.

DOI：10.1016/j.ijmecsci.2013.09.026

• Materials modelling
• Elastic behaviour
• Springback
• TRIP 700
• Computational curve fitting

This paper presents an extension of the classical elastic law. The main objective of this new law is to represent linear and non-linear behaviour for computational metal forming purposes. %26lt;br%26gt;The extension of the model is built by means of a stress-strain relationship given by an integral equation, its kernel characterising the mentioned complex behaviour. A specific application is presented for a TRIP 700 steel. Using experimental data obtained from elastoplasticity tests, the kernel of the model is formulated by means of a specific computational curve fitting procedure. The excellent agreement between experimental data and fitted model results validates the proposed model. %26lt;br%26gt;Furthermore, a V-bending test is simulated, springback being represented by means of three different models: elastic, linear elastic with variable elastic modulus and extended elastic models. From the results differences between extended elastic law and the classical one are around 50%.

• 出版日期2013-12