On the use of heterogeneous thermomechanical and thermophysical material properties in finite element analyses of cast components

Joint 5th International Conference on Advances in Solidification Processes;5th International Symposium on Cutting Edge of Computer Simulation of Solidification, Casting and Refining

土木建筑工程;计算机科学

Jansson, Johan^1 ; Olofsson, Jakob^1 ; Salomonsson, Kent^1

Department of Materials and Manufacturing, School of Engineering, Jönköping University, Box 1026, Jönköping

SE-551 11, Sweden^1

关键词: Experimental methods;    Heterogeneous distributions;    Integrated simulations;    Material scientists;    Microstructural features;    Microstructure modelling;    Strength-differential effects;    Thermophysical material properties;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/529/1/012076/pdf
DOI  :  10.1088/1757-899X/529/1/012076

来源: IOP

【 摘 要 】

Cast components generally show a heterogeneous distribution of material properties, caused by variations in the microstructure that forms during solidification. Variations caused by the casting process are not commonly considered in structural analyses, which might result in manufacturing of sub-optimised components with unexpected in-use behaviour. In this paper, we present a methodology which can be used to consider both thermomechanical and thermophysical variations using finite element analyses in cast components. The methodology is based on process simulations including microstructure modelling and correlations between microstructural features and material properties. Local material data are generated from the process simulation results, which are integrated into subsequent structural analyses. In order to demonstrate the methodology, it is applied to a cast iron cylinder head. The heterogeneous distribution of material properties in this component is investigated using experimental methods, demonstrating local variations in both mechanical and physical behaviour. In addition, the strength-differential effect on tensile and compressive behaviour of cast iron is considered in the modelling. The integrated simulation methodology presented in this work is relevant to both design engineers, production engineers as well as material scientists, in order to study and better understand how local variations in microstructure might influence the performance and behaviour of cast components under in-use conditions.