The effect of strain rate on the deformation texture of alpha-iron ( -Fe) is studied at different strain levels during the deformation. Two shear compression specimens (SCS) were deformed in three consecutive stages at room temperature, one at 10 /s and the other at 10 /s, to the same strain level. The crystallographic textures were determined using electron backscattered diffraction. The textu...

Abstract This article reports the effects of friction on flow stress-strain curve obtained from uniaxial compression test. Uniaxial test was done at deformation temperature range 575 °C–650 °C and strain rates 0.001 s −1 , 0.01 0.1 0.5 to a 0.6 using Gleeble ® 3500 thermo-mechanical simulator. The parameter calculated by analytical equation literature. study results. results showed variation be...

Compression-compression fatigue testing of metallic-glass foam is performed. A stress-life curve is constructed, which reveals an endurance limit at a fatigue ratio of about 0.1. The origin of fatigue resistance of this foam is identified to be the tendency of intracellular struts to undergo elastic and reversible buckling, while the fatigue process is understood to advance by anelastic strut b...

BACKGROUND The most common method of customizing shoe insoles to the shape and surface of the foot is to heat and then mold the materials. The effect of heating on the mechanical properties of these materials is unknown. METHODS The properties of individual and common combinations of insole materials were tested before and after heating. Individual materials tested were soft Plastazote (SP), ...

On a Gleeble-3800 simulator, isothermal hot compression tests of an as-cast N06625 nickel-based alloy were conducted in wide range temperatures (950–1200 °C) and strain rates (0.1–50 s–1). Considering the influence friction adiabatic heating test, flow curves corrected. A modified Johnson-Cook, strain-compensated Arrhenius-type Hensel-Spittel constitutive models established based on corrected c...

The deformation behavior and microstructure of 25CrMo4 axle steel was systematically investigated by thermal compression deformation. hot-compression test a sample carried out on Gleeble-3800 mechanical simulation tester. flow the alloy studied at temperature (900–1200 °C), strain rates (0.01; 0.1; 1.0) s–1 maximum 60 %. curves under different conditions were obtained, effects rate appearance a...

Abstract Most cellular solids presented random structure, while practically periodic models were often used in structure-property relations and numerical models. The finite element method was to create a 2D model that replicated the deformation characteristics of influences porosity strain rate on characteristic, energy dissipation mechanisms investigated. Poisson’s ratio evolution during compr...

Carbon nanotubes have the potential to construct highly compressible and elastic macroscopic structures such as films, aerogels and sponges. The structure-related deformation mechanism determines the mechanical behavior of those structures and niche applications. Here, we show a novel strategy to integrate aligned and random nanotube layers and reveal their deformation mechanism under uniaxial ...

The goal of this research is to develop a 3D finite element (FE) model of a left ventricular assist device (LVAD) to predict stresses in the blood sac. The hyperelastic stress-strain curves for the segmented poly(ether polyurethane urea) (SPEUU) blood sac were determined in both tension and compression using a servo-hydraulic testing system at various strain rates. Over the range of strain rate...

The dynamic recrystallization (DRX) behavior of as-extruded AM50 magnesium alloy was modelled and simulated by a cellular automaton (CA) method. Isothermal compression experiments were conducted, the characteristic parameters in CA model obtained testing stress–strain flow curves wide temperature range 250–450 °C strain rate 0.001–10 s?1. stress, DRX volume fraction grain size predicted simulat...