Materials Literature
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<div class="htmlview paragraph">This paper describes a new concept for a Ford F-150 light truck Front End Support Assembly (FESA) based on a one-piece die cast structural magnesium component. This new FESA reduces the number of parts and therefore the complexity of manufacturing and assembly, it integrates a mul…
This paper examines the recovery of liquid from stable overflowing foams. The foams are formed by bubbling gas into the bottom of a column and the liquid is collected from the foam that flows over the lip at the top. The paper demonstrates, using a foam drainage equation, that the recovery of liquid will rapidly decre…
Abstract Hydrolytic degradation data from a wide variety of experiments on Estane 5703, a commercial poly(ester urethane), are modeled with an A AC 2 mechanism of reversible esterification and hydrolysis together with a cluster model for water concentration. The experimental conditions spanned a range of temperatures…
<div class="htmlview paragraph">The influences of laboratory-induced hydrogen on the tensile deformation and fracture behavior of selected sheet steels including conventional DQSK and HSLA steels as well as newer DP and TRIP grades were evaluated. The effects of cold work, simulated paint baking, and natural agi…
<div class="htmlview paragraph">Lean NOx Trap (LNT) is an aftertreatment device typically used to reduce oxides of nitrogen (NOx) emissions for a lean burn engine. NOx is stored in the LNT during the lean operation of an engine. When the air-fuel ratio becomes rich, the stored NOx is released and catalytically r…
<div class="htmlview paragraph">By means of catalysts, either coatings or fuel-borne, the temperature level for triggering the combustion of soot stored in particulate traps can be lowered from 600°C to 300°C, in case of CRT even to 250°C; but even that may fail, if in dense traffic application of a city-bus onl…
<div class="htmlview paragraph">The present work intends to examine the selective NOx reduction efficiency of a current commercial Titanium-Vanadium washcoated catalyst and to develop a transient numerical model capable of describing the SCR process while using a wide range of inlet conditions such as space velo…
In recent years advanced computational tools of Diesel Particulate Filter (DPF) regeneration have been developed to assist in the systematic and cost-effective optimization of next generation particulate trap systems. Inthe present study we employ an experimentally validated, state-of-the-art multichannel DPF simulato…
<div class="htmlview paragraph">A one-dimensional, two layer computational model was developed to predict the behavior of a clean and particulate-loaded catalyzed wall-flow diesel particulate filter (CPF). The model included the mechanisms of particle deposition inside the CPF porous wall and on the CPF wall sur…
<div class="htmlview paragraph">Traditional constitutive models can only describe a parallel or divergent stress strain response at different strain rates. This paper presents a new constitutive model that can describe convergent, divergent or parallel stress strain patterns. The new model is a modification to t…
<div class="htmlview paragraph">An advanced controller for a urea SCR (Selective Catalytic Reduction) catalytic converter system for a mobile heavy-duty diesel engine is presented. The after-treatment system is composed of the injecting device for urea solution and a single SCR catalytic converter. The control s…
<div class="htmlview paragraph">This paper summarizes results from a large study on the release of NO<sub>x</sub> from a lean NO<sub>x</sub> trap during rich purges. Under certain purge conditions, some NO<sub>x</sub> trap formulations have the propensity to release some of th…
The excimer fluorescence of a bis-pyrene molecule can be reversibly regulated by ultraviolet light, metal ions and visible light in the presence of spiropyran. Based on this result, a new molecular logic circuit is proposed.
The linewidth of longitudinal acoustic waves in densified silica glass is obtained by inelastic x-ray scattering. It increases with a high power alpha of the frequency up to a crossover where the waves experience strong scattering. We find that alpha is at least 4, and probably larger. Resonance and hybridization of a…
Acetylsalicylic acid reacts with gadolinium(III) ions to yield a new gadolinium complex (1) displaying a chain structure which has been determined by single crystal X-ray crystallography: monoclinic P21/n (no. 14), a = 13.5709(13), b = 6.7141(9), c = 22.7232(17) Å, β = 99.705(14)°, Z = 4. The thermal dependence of the…
Abstract The synthesis of a new bis(ether carboxylic acid), 2,2′‐bis(4‐carboxyphenoxy)‐9,9′‐spirobifluorene, in which two orthogonally arranged carboxyphenoxyfluorene entities are connected through an sp 3 carbon atom (the spiro center), is reported. The direct phosphorylation polycondensation of this diacid monomer w…
This work reports on the development and characterization of novel meltable polymers and composites based on casein and soybean proteins. The effects of inert (Al(2)O(3)) and bioactive (tricalcium phosphate) ceramic reinforcements over the mechanical performance, water absorption, and bioactivity behavior of the injec…
Recent photoemission spectra of the perovskite series CaxSr1-xVO3 revealed strong modifications associated with surface contributions. To study the effect of Coulomb correlations in the bulk and at the surface, the quasiparticle spectra are evaluated using the dynamical mean field theory. It is shown that as a result…
The interaction of C60 with single-wall carbon nanotubes (SWNTs) and graphite is studied experimentally by thermal desorption spectroscopy and theoretically by molecular-mechanics and molecular-dynamics calculations. The van der Waals parameters and force field for C60-graphene and C60-SWNT interactions are derived fr…
Using molecular dynamics simulations, we show that a simple model of a glassy material exhibits the shear localization phenomenon observed in many complex fluids. At low shear rates, the system separates into a fluidized shear band and an unsheared part. The two bands are characterized by a very different dynamics pro…