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Constitutive Modeling of Large Ratcheting Strains in Carbon Steel

Göran Johansson (Institutionen för tillämpad mekanik, Materialteknik)
Göteborg : Chalmers University of Technology, 2004. - viii, 6 s. s.
[Licentiatavhandling]

A thermodynamically consistent constitutive material model for describing the large strain response of polycrystalline metals during cyclic loading is proposed. In particular, it is proposed to model experimentally observed large ratcheting strains in rail steel by the classical Armstrong-Frederick evolution rule and several back-stresses. In addition, it is suggested that the multi-axial ratcheting rate depends on the Hessian of the yield function. In order to predict a physically realistic response, the model parameters are calibrated (via optimization algorithms) against different sets of experimental data for railway steel.



Denna post skapades 2006-09-25. Senast ändrad 2014-01-14.
CPL Pubid: 3863

 

Institutioner (Chalmers)

Institutionen för tillämpad mekanik, Materialteknik (1900-2004)

Ämnesområden

Teknisk mekanik

Chalmers infrastruktur

Examination

Datum: 2004-06-03

Ingår i serie

Thesis for the degree of licentiate of engineering - Department of Applied Mechanics, Chalmers University of Technology 2004:2