Plasticity computer modeling

Years ago plastic scale models were fabricated for each plant under construction, providing excellent three-dimensional representations of the actual facilities. Today, in the age of the microcomputer, it is quicker, easier, and much cheaper to generate models by means of computer graphics. 

A goal of this work was to refine the cubic section model developed by Jones using computer modelling. Thus, equivalent orientations of compounds, cube size, I.SA. and origin location were used to construct the cubic section models of HLADH. Because the jacks and plastic tubing of the mechanical model occupy space, Jones changed... 

However, there are clouds on the regulatory horizon. There are individuals and institutions who sincerely believe that valid reasons exist to establish government regulations to limit or even eliminate many CFC blown plastic foam products. Since 197, CFCs and particularly CFC 11 and CFC 12 have been under scrutiny by scientists, environmentalists, and government agencies because of a theory — based on a computer model — that these compounds threaten to deplete the ozone layer in the stratosphere. 

Fig. 6 (a) Host and guest molecules used in the glycoluril-based materials, (b) Computer-modeled representation of the liquid-crystalline host-guest complex between porphyrin %% and four molecules of Host 21. (c) Modeled structure of the arrangement of dimers in the lamellar plastic crystal formed by 23, (d) Modeled structures of the 1 1 host-guest complexes between 23 and MDB (top) and between 23 and DBA (bottom). (View this art in color at www.dekker.com.)... 

Many properties of materials, such as plastic deformation, fracture, diffusion, and phase transformation, require statistical averaging over many atomic events. Computer modeling of such processes is facilitated by usage of semiempirical interatomic potenhals allowing fast calculations of the total energy and classical interatomic forces. 

Cornell, D. "Computer Model for Comprehensive Curbside Recycling Collection" Proceedings of the Society of Plastic Engineers Regional Technical Conference -Recycling Technology of the 90 s. Chicago, IL. 1990. 

HaU R A (1991) Computer modelling of rubber-toughened plastics random placement of monosized core-shell particles in a polymer matrix and interparticle distance calculations, J Mater Sci 26 5631-5636. 

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