Study of shear nucleation theory in continuous microcellular foam extrusion
نویسندگان
چکیده
منابع مشابه
non-linear study of various slit shear walls in steel structures
seismic retrofit strategies have been developed in the past few decades following the introduction of new seismic provisions and the availability of advanced materials and methods. it can be observed that new approaches to deal with more lateral forces are more innovative and more energy absorbent. in line with this, there is a growing trend toward the use of steel shear walls as a system with ...
15 صفحه اولThe continuum theory of shear localization in two-dimensional foam.
We review some recent advances in the rheology of two-dimensional liquid foams, which should have implications for three-dimensional foams, as well as other mechanical systems that have a yield stress. We focus primarily on shear localization under steady shear, an effect first highlighted in an experiment by Debrégeas et al. A continuum theory which incorporates wall drag has reproduced the ef...
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The production of microporous carbon foams from renewable starch microcellular foam-fiber (SMCF-Fiber) composites is described. Carbon foams are used in applications such as thermal insulation, battery electrodes, filters, fuel cells, and medical devices. SMCF-Fiber composites were created from an aquagel. The water in the aquagel was exchanged with ethanol and then dried and carbonized. Higher...
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Polymer foaming with the process of extrusion assisted by supercritical CO2 is based on the injection of a supercritical fluid, in our case carbon dioxide, in a polymer, which has been previously melted in the barrel of an extruder. Upon depressurisation that happens in the die, nucleated bubbles will appear and grow. Modelling the nucleation and growth is important to better understand and mas...
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The foam sclerotherapy is a popular and highly effective method of varicose disease treatment allowing to obtain a positive result in more than 80% of cases. The foams characteristics depend on the kind of sclerosant, its concentration, a type of gas, gas/liquid ratio, and the technique of foam preparation. The present investigation, was carried out to assess the influence of temperature on the...
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ژورنال
عنوان ژورنال: Polymer Testing
سال: 2003
ISSN: 0142-9418
DOI: 10.1016/s0142-9418(03)00004-7