Constitutive Model News Today

The accuracy of the cutting simulation model greatly depends on the constitutive models, thermophysical models, and friction models. However, accurate modeling of physical and mechanical relationships is not enough. The physical and mechanical behavior of the machined surface from the last cut should be modelled in the FE model. In this study, the cutting simulation model of S316L stainless steel was established. The above model consists of two subsequent simulated cuts. The first simulated cut ...

Grain refinement occurs during manufacturing process, and grain size has a significant impact on mechanical properties. It is essential to establish the relationship between grain evolution and plastic behavior. The quasi-static and dynamic compression experiments for three kinds of oxygen-free high-conductivity (OFHC) copper with different grain sizes have been carried out. The true stress-strain curves were corrected to the isothermal curves, in which the temperature dependence of the specific...

A method is proposed to determine the accurate constitutive model of individual phase in multiphase steel with small phase size. The nanoindentation tests with continuous stiffness method (CSM) were implemented to obtain the hardness-displacement curves of the advanced high strength steel DP1180. The validity of the nanoindentation results was evaluated based on the EBSD results and classic indentation size effect (ISE) model. The extra loading of loading-displacement curves due to geometrically...

Abstract This article explores the characteristic flow behaviour and microstructure analysis of Si–Cr spring steel under various compression conditions by a Gleeble 3500 facility. To better simulate the abrupt and complex compression during the hot forming process, three compression strain rates (0.01 s , 0.1 s , and 1 s ) and four compressive temperatures (850, 900, 950 and 1000 °C) were selected. The outcomes exhibit the intragranular dislocation cells and pile-up along the subgrains were ...