The stress–strain response of Co–Ni–Al with a two-phase microstructure displayed an unusual decrease in critical stress (84%) with strain or thermal cycling accompanied with an improved recoverability of pseudoelastic and shape memory strains. The pronounced decrease in critical stress occurred over a wide temperature range (145 C), and is linked to the interaction of the transformation front w...

To study the deformation and failure behavior of open-graded friction course (OGFC) before cracking at low temperatures, a four-point bending test trabecula was conducted, process monitored by digital speckle method (DSM). The distribution law strain field trabecular specimens analyzed. horizontal gradually changed from uniform to concentration area with loading. crack initiation time, strain, ...

heat stress is well recognized among the hazardous physical agents that might be present during work. this study aims to compare wbgt index at acclimated and unacclimated people to permissible threshold limit value and study the differences between physiological parameters at them. twenty one healthy men were participated in the study. all of the subjects were monitored in two different weather...

Overburden collapse and water inrush in mines are primarily caused by rock fractures. Mining safety can be enhanced monitoring identifying early signs of coal failure the mines. This article collected acoustic emission data synchronously throughout a series uniaxial compression (UC) experiments on natural water-saturated coal. The influence mechanisms water, mechanical properties, signals stres...

We performed simultaneous high-fidelity left ventricular pressure and echocardiographic dimension measurements in 30 patients with normal left ventricular function (group 1; n = 6), moderate-tosevere aortic regurgitation (group 2; n = 14) or congestive cardiomyopathy (group 3; n = 10). We determined diastolic stress, strain and strain rate in all 30 patients and fitted the data to a simple elas...

The Sherwood-Frost constitutive model is widely used to predict the mechanical behavior of polymer materials, and it a very important material model. In this study, stress-strain curve high-density polyethylene (HDPE) with strain rate ranging from 935 5450 s−1 was obtained through split Hopkinson bar test device. Based on HDPE dynamic performance test, method for determining strain-rate paramet...

BACKGROUND AND AIM The function of the common bile duct is to transport bile from the liver and the gall bladder to the duodenum. Since the bile duct is a distensible tube consisting mainly of connective tissue, it is important to obtain data on the passive mechanical wall properties. The aims of this study were to study morphometric and biomechanical wall properties during distension of the bi...

Abstract There are still two deficiencies in the study of crack propagation plane steel. One is that there few studies on theory cracking and criterion from strain field at tip; other using block discrete element method to explore propagation. In view above points, this paper proposes a strength explain extension tensile cracks shear This assumes: (1) Tensile grow along direction maximum princi...

Introduction: Study of the non-linear behavior of trabecular bone at habitual “small” strains (<0.4% strain [1]) is vital for further investigation of the cellular response to mechanical loading of bone tissue, in vivo energy dissipation mechanisms, implant interface mechanics, and biomechanical constitutive modeling. Perceptions of the initial non-linearity in the stressstrain curve have shift...

The mechanical characteristics of rock salt have an important influence on the safety of the salt cavity. The acoustic emission (AE) technique was used to analyze the generation of microcracks in rock salt under uniaxial compression condition. By monitoring acoustic emission in whole process of stress strain curve under uniaxial compression test, the damage characteristic of rock salt is obtain...