Academic Year 2018/2019
- Docente: Piero Morelli
- Credits: 9
- SSD: ING-IND/14
- Language: Italian
- Teaching Mode: Traditional lectures
- Campus: Bologna
- Corso: First cycle degree programme (L) in Chemical and Biochemical Engineering (cod. 8887)
Learning outcomes
Fundamentals in solid mechanics, structural anaylsis and related normative references. Stress and strain analysis and mechanical behaviour of materials due to static, fatigue and thermal loading. Basic design practices of shells and plates.
Course contents
Part 1 (solid mechanics): quasi-static tensile test, stress and strain tensor, mechanical behavior of materials and Hooke's law, elastic strain energy density, thermal effect. Transformation of the stress tensor, principal stress components and representation of the stress state in Mohr's plan. Strength criteria. Indefinite equations of equilibrium, compatibility and constitutive relationships. Existence and uniqueness of the solution.
Part 2 (pressure vessels): dimensioning, strength verification and strain calculation of thick cylindrical and spherical reactors. Design and verification of cylindrical and conical shells, spherical, torispherical and ellipsoidal dished ends.
Part 3 (static analysis of beam systems): structural analysis of frames and trusses labile, iso- and hyper-static. Analysis of the loads and constraints, modelling of the balanced load pattern in the free body, diagrams of the internal actions. Geometric properties of plane sections (area, static moments and moments of inertia, inertia tensor, principal inertia and representation in the Mohr's plane). Stress and strain analysis of axial force, torsion, bending and shear. Study of the elastic line of beams in bending, Castigliano theorem, elastic influence coefficients. Buckling of compressed beams.
Part4 (machine elements): stress field due to Hertzian contact, bearings, spur gears.
Part5 (connections): bolted and welded joints.
Part6 (fatigue design): geometric concentration of stresses, fatigue and fracture mechanics, creep, residual stresses, welding.
Readings/Bibliography
Handouts and educational materials are available on-line (download link published on the course IOL)
Suggested reading for further details on parts 1 and 3: "Solid Mechanics", Beer; Mc-Grow Hill.
Suggested reading for further details on parts 4, 5 and 6: "Fondamenti di Costruzione di Macchine", Juvinall e Marshek; CittàStudi edizioni
Teaching methods
Lecture
Assessment methods
Written and oral examination
Teaching tools
Lecture notes and application examples from the E_CAE experimentation program available on-line.
Use of the symbolic algebraic calculation software WxMaxima.
Office hours
See the website of Piero Morelli