Large elastic deformation is used in order to model the mechanics of left ventricular contraction. The active force generated by the myocardium is modeled as force/unit myocardial volume in the mathematical formalism describing the local equilibrium of forces in the myocardium. Expressions for the stress components are derived by assuming a cylindrical geometry for the left ventricle, the total...

The development of orthodontics has improved thanks to the introduction of adhesives which are physically and chemically akin to tooth enamel and brackets. These materials often fall short of the required durability standards. The objective was to evaluate the real strength of the adhesives and to introduce a proprietary device, generating multiple vectors of strength between dental brackets an...

INTRODUCTION The Tension-type headache (CT) is a heterogeneous disorder of central origin and location, with several possible etiologic factors, including muscle tension involving muscles of the head and neck, psychosocial stress, poor posture and others. [1]. The aim of this study was to investigate the relationship between occlusal anatomy and electromyographic activity of masticatory muscles...

The effect of #110$ uniaxial stresses up to 1.5 GPa on defect nucleation during solid phase epitaxy of amorphous !001" Si created via ion implantation was examined. The solid phase epitaxial regrowth velocity was slowed in compression. However, in tension, the velocity was unaffected. Both compression and tension resulted in an increase in regrowth defects compared to the stress-free case. The ...

The constant winding tension can make the filament arranged in order. The stress distribution between the filament balance fully gives play to the enhancement of filament, and increases the intensive workload of the composite winding material. This paper conducts the mechanical analysis for the unwinding roller and tension measuring roller of the cylindrical winding machine so that gets the mec...

To evaluate the level of stress induced by clinical training, ambulatory electrocardiograms from 12 healthy female medical technology students were recorded and the spectral components of heart rate variability (HRV) were analyzed as an index of autonomic nervous function. The HF power reflecting parasympathetic tone was significantly decreased at awakening, compared with that before clinical t...

Cavitation in an aperture flow in a flat plate is studied using viscous potential flow. The maximum tension criterion for cavitation used here was proposed by Joseph [Phy. Rev. E, vol. 51, pp. 1649–1650, 1995; J. Fluid Mech., vol. 366, 367–378, 1998]: “Liquids at atmospheric pressure which cannot withstand tension will cavitate when and where tensile stresses due to motion exceed one atmosphere...

Given the lack of primary data on heat-resistant composites under high-temperature conditions, focus this paper is development an in-plane biaxial apparatus high temperatures and complex loads. Besides loading loads up to 80 kN, can load high-temperatures 2500 °C. A C/C tensile/compression test at 1700 °C illustrates successful use digital speckle pattern technology evaluate mechanical properti...

We study the quasistatic behavior of the lamellar phase of diblock copolymers under uniaxial compression and tension along the normal direction of the layers, in both the weak segregation limit (WSL) and the strong segregation limit (SSL). In the SSL, we derive a (nonlinear) continuum free energy description of the system in terms of local displacement of the lamellar layers, and use this free ...

Constitutive equations are developed for single crystal bcc-Fe at low and ambient temperatures based on the assumption that non-Schmid effects are primarily influential on orientation dependence and tension–compression asymmetry of the initial yield stress. Temperature dependence of the non-Schmid parameters is extracted from a fit to available experimental data. Constitutive models are also de...