POLYMERS AND COMPOSITES
Academic year and teacher
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- Versione italiana
- Academic year
- 2019/2020
- Teacher
- FRANCESCO MOLLICA
- Credits
- 6
- Didactic period
- Secondo Semestre
- SSD
- ING-IND/22
Training objectives
- The course concerns basic aspects about the mechanics, design and manufacturing of parts made of polymeric or composite materials
Prerequisites
- Basic chemistry, mechanics of materials, heat transfer and fluid dynamics
Course programme
- General properties of plastics: advantages and disadvantages.
Chemical bonds. Morphology. Configuration and conformation. Molecular weight. Classification. Thermoplastics and thermosets. Transition temperatures: glass transition, melting, crystallization. Measurement.
Composites
Stiffness for anisotropic materials. Orthotropic materials, Transverse isotropy. Unidirectional lamina, plane stress. Laminates, classical lamination theory.
Stiffness matrix for laminates.
Particular laminates:
symnmetric, balanced, skewsymmetric, quasi-isotropic, angle ply, cross ply.
Exercises.
Failure. First Ply Failure, Ultimate Laminate Failure, Delamination.
Processing: manual lay up, prepreg lay up and autoclave curing, filament winding, Resin Transfer Molding, pultrusion. Didactic methods
- Lectures, computer simulations with dedicated software and lab classes
Learning assessment procedures
- Oral exam constituted by:
- 1 general question about polymeric materials among the topics seen in class
- 1 general question about composites concerning topics seen in class
- 1 exercise about the mechanics of composite laminates
- 1 lab project concerning design and manual impregnation of carbon fiber with epoxy resin for realizing a part to be loaded in a suitable way Reference texts
- H. Belofsky - Plastics: Product design and process engineering - Hanser Gardner
R.F. Gibson - Principles of composite materials mechanics - McGraw Hill
I. Crivelli Visconti - Materiali compositi - Hoepli
