In this work, the mechanical behavior of AZ31B-F magnesium alloy under cyclic loading is analyzed with goal contributing to advancement its use in design components and structures. To achieve goal, an experimental program was implemented evaluate response specific proportional loads different stress amplitude ratios. Afterwards, regression methods were applied extend data a wide range loads. As...

Static and dynamic fracture experiments are performed using fatigue pre-cracked three-point bend specimens of a rolled AZ31 Mg alloy on servo-hydraulic universal testing machine Hopkinson bar setup, respectively. The results interpreted in-situ optical imaging along with digital image correlation analysis. Microstructural analysis reveals that the mechanism changes from twin-induced quasi-britt...

Deformation twinning at the tip of a straight crack or notch is analyzed using a phase-field method that seeks equilibrium twin morphologies via direct minimization of a free energy functional. For isotropic solids, the tendency to twin under mode I or mode II loading is found to depend weakly on Poisson’s ratio and elastic nonlinearity and strongly on surface energy and twinning shear (i.e. ei...

OBJECTIVE To evaluate the physical compatibility and chemical stability of mixtures of magnesium sulphate and lidocaine in order to determine the feasibility of manufacturing a prefilled syringe combining these two drugs for use as an intramuscular (IM) loading dose for eclampsia prevention and/or treatment. This ready-to-use mixture will provide a more tolerable and accessible route of adminis...

Magnesium reduces vascular smooth muscle cell (VSMC) calcification in vitro but the mechanism has not been revealed so far. This work used only slightly increased magnesium levels and aimed at determining: a) whether inhibition of magnesium transport into the cell influences VSMC calcification, b) whether Wnt/β-catenin signaling, a key mediator of osteogenic differentiation, is modified by magn...

OBJECTIVES To observe the early adsorption of extracellular matrix and blood plasma proteins to magnesium-incorporated titanium oxide surfaces, which has shown superior bone response in animal models. MATERIAL AND METHODS Commercially pure titanium discs were blasted with titanium dioxide (TiO2) particles (control), and for the test group, TiO2 blasted discs were further processed with a micr...

The effect of natural and modified zeolites on the anaerobic degradation of acetate and methanol was evaluated by the determination of specific methane productivity (SMP) in batch minidigesters of 50 mL at doses of 0.01, 0.05 and 0.1 g of zeolite/g of VSS. The effects of the different zeolite concentrations were determined by the results of the SMP. A kinetic characterization with data of accum...

Results: Out of 31,674 obstetric admissions, 45 (0.14%) were eclampsia cases of which 42.2% belonged to 20 <25 years and 28.8% in 17<20 years age group occurring mostly in primipara (71.1%). Antepartum and postpartum eclampsia were 77.7% and 22.2% respectively. Majority of them presented at 36-40 weeks’(46.6%), unbooked cases being 80% and 20% had antenatal check-up at this hospital. The diasto...

In this paper, a strain-intensity-factor-based method is proposed to calculate the fatigue crack growth under the fully reversed loading condition. A theoretical analysis is conducted in detail to demonstrate that the strain intensity factor is likely to be a better driving parameter correlated with the fatigue crack growth rate than the stress intensity factor (SIF), especially for some metall...