In this paper a generalized NoIHKH material model for the cyclic plasticity of metals is presented. The model is an extension of the original NoIHKH model and uses an associative J2 plasticity material model with combined isotropic and kinematic hardening. In the paper is briefly outlined the original and extended material model mathematical formulation, their numerical implementation, and finally the models behavior is compared on a numerical example. and Obsahuje seznam literatury
Semi finished glass pieces are moulded in the furnace to template forms not only to fit their shape but also to reduce internal stresses. Thermal differences are unwanted and have to be minimized in the cooling procedure of the glass pieces. Simulations of various types and sizes of shaping forms and complex model cooling were accomplished. The aim of these simulations was to optimise geometric parameters, clamping conditions and material of the form, so that thermal differences at glass are minimized during the cooling. and Článek se zabývá numerickým modelováním změn teplotního pole v materiálu skleněných výlisků v průběhu jejich chlazení po tvarování v elektrické peci. Cílem simulací bylo optimalizovat geometrické vlastnosti, způsob uchycení a materiál formy pro tvarování skleněných výlisků tak, aby teplotní diference ve skle byly co nejmenší.