The quantitative model proposed here for nanoimprinting by thermoplastic compression molding is focused on bulk metallic glasses (BMGs), but it is also applicable to polymers and other thermoplastic materials. In our model the flow and pressure fields are evaluated using the lubrication theory, and the effect of molding pressure, BMG viscosity, and capillary pressure on the spatial distribution...

Modeling the compressive behavior of carbon fiber sheet molding compounds (CF-SMC) during processing can be a difficult task. This is due to pronounced porosity SMC materials, which cannot adequately reproduced by currently available compressibility models (also called pvT models). Consequently, macroscopic non-isothermal compression model was developed in this study, easy evaluate and suitable...

This class reviews new functionality in Autodesk Simulation Moldflow Insight software and discusses recent and current research directions of Moldflow development. We cover the following capabilities: viscoelastic warp calculations, improved wall slip calculations, the influence of mold deflection, ejection force predictions, analysis of mold fatigue, flow imbalances (airflow), 3D compression m...

In this work, the simulation results from a program developed for the three-dimensional analysis of compression molding of thermoset composites were compared to the experimental results of an actual molded thermoset sample. The program predicts the flow pattern, fiber orientation, fiber length distribution, curing of the resin and mechanical properties. The comparison between simulation and exp...

Lately, natural fibers have been gaining consideration in development of composites due to its biodegradability, availability and low-cost compared synthetic fibers. Natural are renewable sources, biodegradable, environmentally friendly effortless machinery. In this paper, the manufacturing production for fiber reinforced polymer composite (NFRC) will be reviewed. These including injection mold...

INTRODUCTION Refractive and diffractive hybrid lenses have been designed and implemented for some industrial applications. These optical elements however are limited to low volume production or specific materials such as polymers. Although plastic lenses can be fabricated using injection molding into different geometries at high volume, these optics do not perform well under rigorous conditions...

Biocomposites is a field that has gained much scientific attention due to the current substantial consumption of nonrenewable resources and the environmentally harmful disposal methods required for traditional polymer composites. Research on natural fiber reinforced polyhydroxyalkanoates (PHAs) has gained considerable momentum over the past decade. There is little work on PHAs reinforced with u...