This study investigate the characterization of aluminum barrier laminate tubes produced using plastic materials and effect change in technical properties raw used production on stiffness tube material. Characterization measurements were taken by dynamic scattering calorimetric thermograms young modulus values obtained tensilemeter for stiffness. By comparing with reference from market, it is ai...

We report a simple and direct synthetic method for the preparation of nanoporous carbon nanotubes with larger pores (>10 nm) on the tube wall. The method combines the use of anodic aluminum oxide (AAO) as a template for the tube diameter and block copolymer/carbohydrates self-assembly within thin films confined inside AAO pore channels to form nanopores. It involves coating the AAO inner pore c...

We evaluated the evacuated phlebotomy tube designed specifically for trace metal analysis by Sherwood Medical Co. Pools of human serum containing known concentrations of aluminum, arsenic, calcium, cadmium, copper, chromium, iron, lead, magnesium, manganese, mercury, selenium, and zinc were exposed to the tube and rubber stopper for defined periods ranging from 5 min to 24 h. Analysis for each ...

PURPOSE To limit the side effects of interventional neuroradiologic radiation, such as epilation, by applying a technique involving tube position rotation and by adding a supplemental inexpensive primary beam filter; and to show the dose effect of modifying technical factors. METHODS Combined skin dose from fluoroscopy and digital subtraction angiography was measured with an array of 16 therm...

The fluid-structure interaction simulation of detonationand shock-wave-loaded fracturing thin-walled structures requires numerical methods that can cope with large deformations as well as topology changes. We present a robust level-set-based approach that integrates a Lagrangian thin shell finite element solver with fracture and fragmentation capabilities with an Eulerian Cartesian detonation s...

Position resolution and lifetime have been studied for one-atmosphere D\IE in half-inch diameter aluminum tube chambers operated in the limited streamer mode. The radial resolution was measured by timing to be CT, = 73 pm. The longitudinal resolution was measured by charge division to be < 0.3% of the wire length. No significant gain changes were seen after 12 C/cm. Submitted to Nuclear Instrum...

The smaller the relative bending radius of bent tube, more difficult tube blank is to be bent. In this paper, push-bending process for aluminum with a 0.9D was analyzed through simulation. There tangential tensile stress concentration occurring at front endpoint intrados, which increased risk cracking. That because tube’s extrados moves less angular distance than its intrados by uniform lubrica...

The work analyzes the influence of number passes in a shell and tubes condenser heat exchanger, with an inlet pressure R134a refrigerant equal to 1.2 MPa. fluid that circulates is water or water-based nanofluid fraction aluminum oxide nanoparticles (Al2O3), methodology used subdivides exchanger into three distinct regions: overheated region, saturated subcooled region. main parameters analyze t...

Abstract The present work will address the problem of designing an in-process control system for a tube hydro-forming process, controlling tool filling forming T-tube. is nontrivial as wrinkling and bursting develop rapidly and, in most cases, are irreversible—thus, must react fast without extensive overshoot. objective to filling, reproducing reference trajectory, where controller input define...

Although very accurate in representing the material anisotropy, finite element analysis based on direct use of a polycrystal model is CPU-intensive (Guan et al., 2006a). In the present study, this Taylor-type polycrystalline model was firstly used to predict the anisotropy coefficients of Yld96 yield function. Then this phenomenological anisotropic yield function was implemented into ABAQUS/Sta...