Developmental processes in nature may involve complex changes in the topology, shape, and patterns of growing structures. Processes taking place in one or two dimensions can be visualized as objects in three-dimensional space, obtained by extruding the growing structures along a line or curve representing the progress of time. In this paper, we extend the notion of L-systems with turtle interpr...

Estimates of the reliability of wood plastic composites (WPC) are explored for two industrial extrusion lines. The goal of the paper is to use parametric and non-parametric analyses to examine potential differences in the WPC metrics of reliability for the two extrusion lines that may be helpful for use by the practitioner. A parametric analysis of the extrusion lines reveals some similarities ...

Background Nanocomposites composed of carbon nanotubes (CNTs) in a polymer matrix exhibit a significant enhancement of electrical conductivity, mechanical and thermal properties [1, 2]. Due to the large length to diameter aspect ratios (from 100 to 10,000), they create conducting networks at low volume fractions [3]. In many forming processes (injection, extrusion, among many others), however, ...

The proposed Adhesion-Deformation-Hydrodynamic model of friction and wear is based on the relationship elastic-deformation processes in surfaces curvilinear contacts with hydrodynamic regular extrusion rarefaction lubricating layers tribocontacts, as well primary adhesion subsequent acts adhesive wear. its main provisions between extrusion, cover entire load-speed range all modes lubrication

An extrusion process especially designed for extrusion of pipes made from fiber reinforced cementitious materials has been developed at Department of Structural Engineering and Materials at the Technical University of Denmark. Engineered Cementitious Composite (ECC) materials have been developed in recent years at Department of Civil and Envirionmental Engineering, University of Michigan. These...

This article describes the operation principle of an extrusion line for producing a polypropylene film sleeves. The advantages and disadvantages technological structural nature are presented, as well stages polymer sleeves with calculation parameters description main purpose each stage. quality is described, such turbidity, coefficient friction, glossiness, breaking strength. dependence milkine...

In this paper, several versions of extrusion processes were used to provide severe plastic deformation for grain refinement (with a modified ECAE extrusion) and for grain/fiber alignment (with straight extrusion). The process was performed at elevated temperatures to reduce extrusion pressure, and in order to increase strength and avoid grain growth secondary phases were added or insitu formed....