Abstract The flow behavior of a novel Cr-Si alloyed hot stamping steel (Cr-Si steel) at elevated temperature was investigated via isothermal compression tests on Gleeble-3500 thermomechanical simulator with range 600 ~ 900 ℃ and strain rate 0.1~10 s-1. Subsequently, the Arrhenius-type constitutive model, comprising compensation, established in accordance friction adiabatic heating corrected str...

In order to study the dynamic mechanical properties of surrounding rock roadway in deep mines with burst, cyclic impact compression tests sandstone under different velocities were carried out by using split Hopkinson pressure bar (SHPB) test system, and stress-strain curves samples loads relationship between energy dissipation numbers analyzed. The results show that, as loading times increase, ...

Abstract This study develops a new phenomenological constitutive model to capture the unique evolving cyclic elastoplastic behaviours of hexagonal close-packed (HCP) sheet metals. is developed by adopting concepts multiple-yield surface approaches. Four deformation modes, including Monotonic Compression (MC), Tension (MT), Reverse (RC), and (RT), are considered represent hardening evolution mat...

In order to investigate the formability of granular medium forming (GMF) based on Mohr–Coulomb constitutive model with tri-axial compression test and true stress–strain curves TA1 titanium alloy from uniaxial tensile tests, numerical simulation sheet deep drawing finite element method was performed, tests were also carried out. Simulation analysis results show that GMF process is suitable for s...

Single crystal Ni-based superalloy, with excellent mechanical properties in high temperature, always works under complex stress states, including multiaxial tension and compression, which results various strengthening mechanisms. In this paper, the atomistic simulation is applied to investigate microstructure evolution loading conditions, uniaxial, equibiaxial, non-equibiaxial tensile–compressi...

An extensive investigation has been carried out on the compressive mechanical behaviour of type 224-carbon steel (0.18 wt % C, 1.21 wt % Mn) over the temperature range -110°C to +300°C and strain-rate 10" to 5000s", making possible the determination of the thermal sensitivity of this material. In several tests, a thermocouple was mounted inside each small cylindrical specimen to observe any tem...

This paper summarizes the research findings of the fundamental characteristics of high-strength concrete for the flexural design of bridge girders. The main objective of the research is to provide recommended provisions to the AASHTO-LRFD Bridge Design Specifications to extend the use of concrete strength up to 18 ksi. A total of 15 plain concrete specimens were tested under eccentric compressi...

We develop lightweight, multilayer materials composed of alternating layers of poly dimethyl siloxane (PDMS) polymer and vertically aligned carbon nanotube (CNT) arrays, and characterize their mechanical response in compression. The CNT arrays used in the assembly are synthesized with graded mechanical properties along their thickness, and their use enables the creation of multilayer structures...

Abstract We investigate the effects of salt concentration on rheological properties dipeptide hydrogel fibres at liquid-liquid interfaces. The interfaces were subjected to large amplitude oscillatory dilation (LAOD) experiments across a range oscillation strains and frequencies. Lissajous plots pressure-strain used for characterizing viscoelastic identifying apparent yielding. show that key asp...

We formulate in situ parameter identification techniques for multistable spring models of compressed CNT bundles, which capture the sequential buckling through the height of the bundle, as well as the overall mechanical response. The proposed techniques are validated against a SEM-assisted compression experiment on a CNT pillar [1]. Using multi-spring models, we propose a ‘microscopic’ identifi...