During blasting in engineering construction, the surrounding rock becomes unstable and is damaged under impacts of multiple low-amplitude stress waves. It great practical significance to understand damage evolution characteristics attenuation mechanical properties rocks subjected Single impact repeated tests for sandstone were carried out using a split Hopkinson pressure bar (SHPB) loading syst...

The main purpose of this study is to develop a variational formulation for predicting structure behavior and accounting damage mechanics in metallic materials. Mechanical coupled thermomechanical models are used predict failure manufacturing processes. Ductile accompanied by significant amount plastic deformation structural components. Finite element simulation evolution ductile solids presente...

Isothermal compression behaviors of 5CrNiMoV steel were studied at temperatures 870, 800, 750, and 700 °C, with strain rates 0.001, 0.005, 0.01, 0.05, 0.1 s−1, the 870 800 °C are above Ac3, as well 750 below Ac3 temperature. The Modified Johnson–Cook (MJC) model Strain–Compensated Arrhenius (SCA) employed to demonstrate relationship between flow stress parameters. correlation coefficient (R) av...

We ascertain the effect of thermal conducive on the initiation and growth of shear bands in a structural steel by analyzing the development of shear bands in a block undergoing overall adiabatic simple shearing deformations. The material of the block is assumed to exhibit strain and strain-rate hardening, and thermal softening. Three constitutive relations, namely, the Litonski law, the Bodner-...

In this paper, we develop a methodology to determine flow stress at the machining regimes and friction characteristics at the tool-chip interface from the results of orthogonal cutting tests. We utilize metal cutting analysis originally developed by late Oxley and present some improvements. We also evaluate several temperature models in calculating the average temperatures at primary and second...

This paper develops a new constitutive model for HCP metals subjected to high strain, high strain rate and high temperature based on the theory of thermally activated dislocation motion in crystal materials. The constitutive parameters of the material are determined by a new efficient method composed of a global genetic algorithm and a local penalty-function algorithm, which guarantees that the...

A uniaxial high-temperature tensile test of an AA7075 aluminum alloy sheet was conducted using established induction heating system. Five different types specimens were designed to obtain the stress–strain curves at forming temperatures and strain rates so as construct modify Johnson–Cook constitutive model. The stress states numerically simulated ABAQUS finite element software, triaxiality equ...