TY - JOUR

T1 - Simulation of lamellar cast iron components under TMF-loads

AU - Strohhäussl, Bernd

AU - Stoschka, Michael

AU - Winter, Gerhard

AU - Grün, Florian

PY - 2017/8/24

Y1 - 2017/8/24

N2 - The mechanical modelling of components made of grey cast iron is a non-trivial task, especially when subjected to non-isothermal thermo-mechanical loading conditions. Hence, elasto-plastic deformations as well as time-dependent creep processes have to be taken into account in the simulation in order to accurately model the mechanical stress-strain relationship. Consequently, a methodology to simulate the complex deformation behaviour based on a damage modified viscoplastic constitutive model is introduced. This methodology also contains a semi-automated parameter optimization strategy featuring a genetic algorithm. The correspondingly conducted cyclic mechanical simulation runs match well with the experimental data. Only marginal deviations in the evaluated stress-strain hysteresis can be found at quite high temperatures.

AB - The mechanical modelling of components made of grey cast iron is a non-trivial task, especially when subjected to non-isothermal thermo-mechanical loading conditions. Hence, elasto-plastic deformations as well as time-dependent creep processes have to be taken into account in the simulation in order to accurately model the mechanical stress-strain relationship. Consequently, a methodology to simulate the complex deformation behaviour based on a damage modified viscoplastic constitutive model is introduced. This methodology also contains a semi-automated parameter optimization strategy featuring a genetic algorithm. The correspondingly conducted cyclic mechanical simulation runs match well with the experimental data. Only marginal deviations in the evaluated stress-strain hysteresis can be found at quite high temperatures.

KW - Cast iron

KW - Constitutive material model

KW - Cyclic viscoplasticity

KW - Damage mechanics

KW - Genetic algorithm

KW - Thermo-mechanical fatigue (TMF)

UR - http://www.scopus.com/inward/record.url?scp=85028357767&partnerID=8YFLogxK

U2 - 10.1016/j.matpr.2017.06.077

DO - 10.1016/j.matpr.2017.06.077

M3 - Article

AN - SCOPUS:85028357767

VL - 4.2017

SP - 5957

EP - 5962

JO - Materials Today: Proceedings

JF - Materials Today: Proceedings

SN - 2214-7853

IS - 5, Part 1

ER -