last modified: 02/03/2006

Course code: wb1408A

Course name: Shell Structures - introductory course

This concerns a Course

ECTS credit points: 3

Faculty of 3mE

Section of Engineering Mechanics

Lecturer(s): Ernst, prof.dr.ir. L.J.

Tel.:  015 - 27 86594 /      

Catalog data:

Shells, pressure vessels, engineering codes, design for reliability, simulations

Course year:

MSc 1st year

Semester:

2A

Hours per week:

4

Other hours:

3

Assessment:

Oral exam

Assessment period:

, ,

(see academic calendar)

 

Prerequisites (course codes):
wb1212, wb1213-03, wb1214, wb1311

Follow up (course codes):
wb1408B

Detailed description of topics:

  • Load bearing principles in shell structures
  • Axi-symmetrical thin shells
  • Membrane theory versus general theory
  • Stress catogaries and life assessment, background of "design by analysis" in engineering codes
  • Thermo-mechanical loading
  • Axi-symmetric thick-walled shells
  • Finite Element applications to local shell problems
  • Mechanical design aspects of pressure vessels, flares, tube-plates, nozzles, flanges, etc.

Course material:

  • Lecture notes available via Blackboard

References from literature:

  • S. Timoshenko, "Theory of Plates and Shells", MacGraw-Hill
  • S. Schwaigerer, "Festigkeitsberechnung im Dampfkessel, Behalter-und Rohrleitungsbau", Spriger-Verlag
  • Timoshenko and Goodier, Theory of Elasticity
  • V.V. Novozhilov, "Thin Shell Theory", Noordhof
  • R.J. Roark, W.C. Young, "Formulas for stress and strain", McGraw-Hill
  • ASME-code, NB3000 and A8000

Remarks assessment, entry requirements, etc.:
Oral exam after approval of exercises

Learning goals:
The student must be able to:

  1. understand general load bearing principles in shell structures

  2. describe the theory of linear axi-symmetric shells

  3. identify the difference in load bearing behaviour according to membrane theory and general theory

  4. understand the limits of applicability of thin shell theory

  5. classify stresses in thin and thick shells according to stress categories and perform life time assessment

  6. perform  "design by analysis" of thin and thick pressure vessel parts in accordance with  engineering codes and standards

  7. perform finite element stress analysis to shells and components and to perform the reliability evaluation

Computer use:
ANSYS-exercise

Laboratory project(s):

Design content:

Yes, Designing for reliability of pressure vessels and components

Percentage of design:  50%