A Method to reduce calculation time for FE simulations using constitutive material models. (November 2014)

• Record Type: Journal Article
• Authors: Kontermann, C.; Scholz, A.; Oechsner, M.
• Is Part Of: Materials at high temperatures. Volume 31:Number 4(2014)
• Page Start: 334
• Page End: 342
• Publication Date: 2014-11
• Subjects: Constitutive material model, -- Creep–fatigue assessment, -- Extrapolation method, -- Industry usage; Materials at high temperatures -- Periodicals; High temperatures -- Periodicals; 620.1121705
• DOI: 10.1179/0960340914Z.00000000044
• Languages: English
• ISSNs: 0960-3409

Abstract

Abstract : The utilisation of constitutive material models is a widely applied approach to simulate the deformation and damage evolution under creep–fatigue loading. However, the application of such kind of models is mostly very time consuming. For a practical and efficient use in daily industry business, answers have to be found to reduce calculation time. In this paper, the potential of the usage of an extrapolation method will be presented. This method is based upon a forward and backward extrapolation algorithm of inner state variables required for the description of both, deformation and damage. In the end, only a small fraction of load cycles have to be simulated. This leads to a significant reduction of calculation time with a negligible influence on result preciseness. Discussing the potential of the application of a developed extrapolation method in combination with a developed unified viscoplastic material model is the main goal of this paper.