Course detail

FEM in Engineering Computations I

FSI-RIV Acad. year: 2022/2023 Winter semester

The course presents an introduction to selected numerical methods in Continuum Mechanics (finite difference method, boundary element method) and, in
particular, a more detailed discourse of the Finite Element Method. The relation to Ritz method is explained, algorithm of the FEM is presented together with
the basic theory and terminology (discretisation of continuum, types of elements, shape functions, element and global matrices of stiffness, pre- and
post-processing). Application of the FEM in different areas of engineering analysis is presented in theory and practice: static linear elasticity, dynamics
(modal analysis and transient problem), thermal analysis. In the practical part students will learn how to create an appropriate computational model and
realise the FE analysis using commercial software.

Language of instruction

Czech

Number of ECTS credits

5

Learning outcomes of the course unit

Students learn how to formulate appropriate computational models of typical problems of applied mechanics. They will become experienced in preparation,
running and postprocessing of FE models and able to use any of the commercial FE packages after only a short introductory training.

Prerequisites

Matrix notation, linear algebra, function of one and more variables, calculus, differential equations, elementary dynamics, elasticity and thermal conduction.

Planned learning activities and teaching methods

The course is taught through lectures explaining the basic principles and theory of the discipline. Exercises are focused on practical topics presented in lectures.

Assesment methods and criteria linked to learning outcomes

The course-unit credits award is based on the individual preparation of two semester projects, proving students have mastered the work with a selected FE
package. Examination has the form of a written test.

Aims

Aim of the course is to present numerical solution of problems of Structural and Continuum Mechanics by Finite Element Method and to give a general view
of the possibilities of commercial FE packages.

Specification of controlled education, way of implementation and compensation for absences

Attendance at practical training is obligatory. Study progress is checked in seminar work during the whole semester.

The study programmes with the given course

Programme N-SLE-P: Foundry Technology, Master's, elective

Programme N-MTI-P: Materials Engineering, Master's, elective

Programme N-IMB-P: Engineering Mechanics and Biomechanics, Master's
specialization BIO: Biomechanics, compulsory

Programme N-ETI-P: Power and Thermo-fluid Engineering, Master's
specialization FLI: Fluid Engineering, compulsory

Programme N-IMB-P: Engineering Mechanics and Biomechanics, Master's
specialization IME: Engineering Mechanics, compulsory

Type of course unit

 

Lecture

26 hours, optionally

Teacher / Lecturer

Syllabus

Discretisation in Continuum Mechanics by different numerical methods


Variational formulation of FEM, historical notes


Illustration of FE algorithm on the example of 1D elastic bar


Line elements in 2D and 3D space – bars, beams, frames


Plane and axisymmetrical elements, mesh topology and stiffness matrix structure


Isoparametric formulation of elements


Equation solvers, domain solutions


Convergence, compatibility, hierarchical and adaptive algorithms


Plate and shell elements


FEM in dynamics, consistent and diagonal mass matrix


Explicit FE solution


FEM in heat conduction problems, stationary and transient analysis


Optimization with FEM


 

Computer-assisted exercise

26 hours, compulsory

Teacher / Lecturer

Syllabus

Illustration of algorithm of Finite Difference Method on selected elasticity problem

Commercial FE packages – brief overview


ANSYS – Introduction to environment and basic commands


Frame structure in 2D


Frame structure in 3D


Plane problem of elasticity


3D problem, pre- and postprocessing


Post processing with Workbench


Consultation of individual projects

Modal analysis by ANSYS


Consultation of individual projects


Transient problem of dynamics, stress vaves


Problem of heat conduction and thermal stress analysis


Presentation of semester projects