Digitization of Structured Composite Plates with Regard to Their Numerical Simulations

Abstract

A method of 3D scanning and a subsequent data reconstruction presented in this paper are focused on digitization of highly structured composite parts with regard to creation of a fully functional CAD and FEM model. The digitized parts are structured carbon composites made replication of steel templates. Production of steel templates is a technological procedure mostly based on pressing or rolling. However, the data obtained from 3D scanner are not in appropriate format, there are a cloud of points interleaved by a sufrace and it is necessary to use some aditional methods to solidify the resulting geometry. Most often with using commercial software as for example: Creo, Catia, Inventor, Rhino or Geomagic studio is the cloud of points parameterized in a continuous surface. Now, based on some next operations (intersections, blends) the desired solidified model in CAD format could be achieved. Despite the relatively rapid creation of the main shape the minor inaccuracies that occur during noncontact measurement results either in local areas or individual points with a large deflection. The aim of this thesis was to assess the appropriate method for creating geometry and compensation the inaccuracies with regards to numerical simulations, especially the meshing and convergency of a solved model. As has been quite surprisingly found, some local small step changes in the geometry could be for the calculation easier to solve than a complicated and highly approximated area. An influence to a solution does not seem important.

Data Collection and Evolution Modeling of Fitness Running Based on Digital Information Technology

“…e purpose of this study is to evaluate appropriate methods for creating geometry and to compensate for inaccuracies in numerical simulation, especially the meshing and convergence of the solution model. As has been found very surprisingly, some local small-step changes in geometry may be easier to solve than complex and highly approximated regions [4].…”

“…ese two formulas reflect the value of the acceleration of the transmission signal b y (r) at time r after passing through the median filter. In formula (4), k and Θ wnd , respectively, define the size of the median filter window and the set of acceleration signal samples in the window. Med means to take the middle value of the set of samples, which is specifically expressed as arranging the acceleration signal samples in the set.…”