TY  - CHAP
U1  - Konferenzveröffentlichung
A1  - Seifert, Thomas
A1  - Hazime, Radwan
A1  - Dropps, Steven
T1  - TMF Life Prediction of High Temperature Components Made of Cast Iron HiSiMo: Part II: Multiaxial Implementation and Component Assessment
T2  - SAE International Journal of Materials and Manufacturing
N2  - HiSiMo cast irons are frequently used as material for high temperature components in engines as e.g. exhaust manifolds and turbo chargers. These components must withstand severe cyclic mechanical and thermal loads throughout their life cycle. The combination of thermal transients with mechanical load cycles results in a complex evolution of damage, leading to thermomechanical fatigue (TMF) of the material and, after a certain number of loading cycles, to failure of the component. In Part I of the paper, a fracture mechanics model for TMF life prediction was developed based on results of uniaxial tests. In this paper (Part II), the model is formulated for three-dimensional stress states, so that it can be applied in a post-processing step of a finite-element analysis. To obtain reliable stresses and (time dependent plastic) strains in the finite-element calculation, a time and temperature dependent plasticity model is applied which takes non-linear kinematic hardening into account. The material properties of the model are identified from the results of the uniaxial test. The plasticity model and the TMF life model are applied to assess the lifetime of an exhaust manifold.
KW  - Stahl
KW  - Hochtemperatur
KW  - Maschinenelement
Y1  - 2014
SN  - 1946-3979 (Print)
SS  - 1946-3979 (Print)
SN  - 1946-3987 (e-ISSN)
SS  - 1946-3987 (e-ISSN)
U6  - https://doi.org/10.4271/2014-01-0905
DO  - https://doi.org/10.4271/2014-01-0905
VL  - 7
IS  - 2
SP  - 421
EP  - 431
ER  -