Course detail
FEM in Engineering Computations II
FSI-RNUAcad. year: 2024/2025
The course is a follow-up to basic lectures in solid mechanics, which are traditionally limited to linear problems, and introduces the basic nonlinearities. Material nonlinearity is represented by several models of plastic behaviour.
Next, contact problems, large displacement and large strain problems are presented. Although some classical solutions to selected nonlinear problems are mentioned (Hertz contact, deformation theory of plasticity), attention is given to numerical solution by the FEM. Above all, the relation between stability and convergence of numerical solution and physical interpretation of the analysed problem is thoroughly inspected in seminars.
Language of instruction
Number of ECTS credits
Mode of study
Guarantor
Entry knowledge
Others: basic theory of elasticity, theory and practical knowledge of the FEM.
Rules for evaluation and completion of the course
The course-unit credit for seminars is granted under the condition of:
- active participation in seminars,
- individual preparation and presentation of a seminar project.
Final evaluation is based on the result of examination, which has a form of a written test of gained knowledge.
Attendance at practical training is obligatory. The absence (in justified cases) is compensated by additional assignments according to the instructions of the tutor.
Aims
problems of solid mechanics.
Students learn how to classify basic types of nonlinear behaviour in solid mechanics, they will learn their characteristics and classical solutions for some
types of problems. They can prepare numerical computational model, solve it using some of the commercial FE systems and make a rational analysis of
typical problems with divergence of the iterative process of solution.
Study aids
Prerequisites and corequisites
Basic literature
K.-J.Bathe: Finite Element Procedures, K.-J.Bathe, 2014
M.A.Crisfield et al.: Non-linear Finite Element Analysis of Solids and Structures, Wiley, 2012
Recommended reading
Elearning
Classification of course in study plans
Type of course unit
Lecture
Teacher / Lecturer
Syllabus
2. Incremental theory of plasticity and its implementation in FEM systems, Deformation theory of plasticity
3. Elasto-plastic bending of beams, plastic hinge and plastic collaps
4. Elasto-plastic response to cyclic loading
5. Residual stress
6. Contact problems - classical solution
7. Strategy of contact solution in FEM, characteristics of contact elements
8. Large displacement and strain - alternative formulations of strain tensors
9. Large displacement and strain - continued
10. Engineering vs. natural stress and strain, evaluation of materiál flow curve in natural coordinates
11. Stability of thin-walled structures as a nonlinear problem of mechanics
12. Explicit formulation of FEM in nonlinear problems of mechanics
13. Convergence of numerically solved nonlinear problem
Computer-assisted exercise
Teacher / Lecturer
Syllabus
2. Plasticity in FEM - solution of selected tasks
3. Plasticity in FEM - solution of selected tasks
4. Start of seminar project
5. Plastic collaps
6. Residual stress
7. Tutorial of seminar project
8. Solution of contact problem by FEM
9. Tutorial of seminar project
10. Solution of large displacement problem by FEM
11. Solution of stability of shell
12. Example of an explicit FEM solver
13. Presentation of seminar projects
Elearning