Geometrical Modelling and Virtual Prototyping - a.y. 2016/2017
Period (Year/Semester): I/II
Required/expected prior knowledge: Engineering Technical Drawing.
Lecturers: Stanislao Patalano
To know methods for solid and surface modelling. To develop 3D models of mechanical assemblies and industrial products through solid and surface modelling by using parametric-variational CAD software. To build free form curves and surfaces by using numerical analysis software. To execute affine transformation and export curves to environments for geometric modelling. To specify tolerances in order to assure project requirements. To know the virtual prototyping, the variation analysis and the human modeling for the analysis, the verification and the validation of industrial products.
Tables of contents:
Wireframe, B-Rep, CSG and feature-based modelling. Surface modelling. Methods for the representation of free form curves and surfaces. Formats and standards for data exchange. Top-down and bottom-up approaches to the geometrical modelling of assemblies. Methods for Geometric Dimensioning and Tolerancing (GD&T). Envelop and Maximum/Minimum Material Conditions. Datums. Methods for tolerance specifications. Virtual prototyping. Variation modelling and tolerance chain analysis through CAT system. CAT features, contribution ratios. The problem of optimal tolerance allocation. Reverse Engineering. Curve and surface reconstruction by using point clouds. Human modelling and simulated anthropometrical variables. Kinematic models and postural evaluation indexes.Digital human models and CAD environments. Introduction to Virtual Reality. Stereoscopic vision, input and output devices. Applications in railway, automotive, aeronautical and naval field.
Lectures. Exercises using software environments.
Textbooks and learning aids:
Mortenson M.E., “Geometric Modeling”, John Wiley & Sons Ed., New York, 2nd ed., 1997.
Chirone E., Tornincasa S., “DisegnoTecnicoIndustriale”, Volume 2, Ed. Il Capitello, 2008.
Caputo F., Martorelli M., “Disegno e progettazione per la gestione industriale”, Edizioni Scientifiche Italiane, 2003, cap. V.
Caputo F., Di Gironimo G., La realtà virtuale nella progettazione industriale, AracneEditore, 2007, Cap. I and VI.
Lecture notes available on teacher website.
Assessment will be written and oral. Exercises using software environments. Oral discussion.