PROGETTAZIONE INTEGRATA CAD/CAE

The student will acquire theoretical and practical skills in the field of 3D solid modelling. Know current computer-aided design techniques and methodologies in parametric solid modelling. Know how to use specific software for the design of mechanical components using integrated CAD-FEM, CAD-Multibody e CAD-CFD. The knowledge acquired will enable the development of technological solutions aimed at fostering innovation (Goal 9: Industry, Innovation and Infrastructure), promoting the efficient and responsible use of resources (Goal 12: Responsible Consumption and Production), and reducing environmental impact through designs with lower energy consumption and reduced emissions (Goal 13: Climate Action), in alignment with the 2030 Agenda.

Introduction to geometric modeling of machines. CAD in the design cycle. Comparison between conventional design approach and CAD-based design. Generations of CAD systems and integrated CAD-CAE systems.

Theory: 2 hours – Practice: 2 hours

Parametric forms and cubic polynomial curves. Geometric shapes in space. Lagrange method and Hermite method. Interpolating and approximating curves. Continuity conditions.

Theory: 3 hours – Practice: 3 hours

Bézier curves, cubic Bézier curve. Splines, cubic spline. B-Splines, introduction to NURBS. Graphical and analytical construction of a cubic polynomial curve.

Theory: 3 hours – Practice: 3 hours

Mathematical description of surfaces applied to geometric modeling. Ruled surfaces. Bilinear surfaces. Bicubic surfaces. Bézier surfaces. B-spline surfaces. Use of NURBS for conic construction. Torsion vector.

Theory: 3 hours – Practice: 3 hours

Solid modeling techniques. Three-dimensional geometric modeling. Wireframe. Geometric and topological data. Properties of r-sets. Operations on primitives. Constructive solid geometry. Internal representation. Solids of revolution and extrusion. Boundary evaluation. B-Rep modeling. Topological structure. Introduction to advanced modeling functions: blending, lofting, skinning, local operations, shelling, hollowing.

Theory: 4 hours – Practice: 4 hours

Associative geometry. Constraint acquisition. Parametric or procedural approach, variational approach. Mathematical expression of constraints. Interactive systems.

Theory: 2 hours – Practice: 2 hours

Solid modelers. Variable-driven modeling. Features and feature-based modeling. Advanced modeling functions. Hybrid modelers.

Theory: 2 hours – Practice: 2 hours

Virtual prototyping. Product simulation. Process simulation. Electronic data management. CAD-CAE modeling techniques.

Theory: 2 hours – Practice: 2 hours

Rapid prototyping.

Theory: 1 hour – Practice: 1 hour

Integrated CAD-CAE design.

Theory: 2 hours – Practice: 2 hours

Integrated CAD-FEM design techniques.

Theory: 2 hours – Practice: 2 hours

Integrated CAD-Multibody design techniques.

Theory: 1.5 hours – Practice: 1.5 hours

Integrated CAD-CFD design techniques.

Theory: 1.5 hours – Practice: 1.5 hours

1. Lecture notes.
2. M.E. Mortenson, Modelli Geometrici in Computer Graphics – MCGRAW-HILL (TESTO DI RIFERIMENTO - GEOMETRIE PER IL CAD)G. Farin, Curves and Surfaces for CAGD, a Practical Guide - Fifth Edition, Morgan Kaufmann Series in Computer Graphics.
3. G. Farin, Curves and Surfaces for CAGD, a Practical Guide - Fifth Edition, Morgan Kaufmann Series in Computer Graphics.
4. F. Caputo, M. Martorelli, Disegno e progettazione per la gestione industriale, Ed. Scientifiche Italiane.
5. Golovanov, N. Geometric Modeling, CreateSpace Independent Publishing Platform, 2014.
6. Salomon, D. (2007). Curves and surfaces for computer graphics. Springer Science & Business Media.
7. K. Lee, Principles of CAD/CAM/CAE Systems, Addison-Wesley.
8. Belingardi, G. (1995). Il metodo degli elementi finiti nella progettazione meccanica. Libreria editrice universitaria Levrotto & Bella.
9. O. C. Zienkiewicz, R. L. Taylor, J. Z. Zhu : The Finite Element Method: Its Basis and Fundamentals, Butterworth-Heinemann (2005).
10. C. Gianini, Ingegneria strutturale computazionale. Calcolo automatico di strutture meccaniche, Idelson - Gnocchi.
11. Pennestri E. (2002). dinamica tecnica e computazionale sistemi multibody.
12. Shabana, A. A. (2020). Dynamics of multibody systems. Cambridge university press.
13. Gibson, I., Rosen, D. W., Stucker, B., Khorasani, M., Rosen, D., Stucker, B., & Khorasani, M. (2021). Additive manufacturing technologies (Vol. 17, pp. 160-186). Cham, Switzerland: Springer.

The oral test is intended to verify that the theoretical and practical knowledge and skills in the field of 3D solid modelling and integrated CAD-CAE design have been acquired.

The practical test is intended to verify knowledge of integrated CAD-FEM, Multibody and CFD techniques using the PTC Creo modeller and the parametric modeller Catia.

 1 Parametric forms and polynomial curves;

 2 Lagrange's method and Hèrmite's method;

 3 Interpolating curves and approximating curves. Continuity conditions;

 4 Bèzier curves;

 5 The NURBS curves;

 6 The mathematical description of surfaces;

 7 The torsion vector;

 8 Solid modelling techniques;

 9 Operations on primitives;

 10 Constructive solid geometry;

 11 Modelling functions (blending, lofting, skinning, local operations, shelling, hollowing);

 12 Associative geometry. Parametric or procedural approach, variational approach;

 13 Solid modellers. Variable-driven. Features and feature-based modelling. Advanced modelling functions;

 14 CAD-CAE modelling techniques;

 15 Integrated CAD-CAE design;

 16 Finite element modelling techniques;

 17 Multibody modelling techniques;

 18 Rapid prototyping.

19 Reverse Engineering techniques.