Course detail

Strength of Materials II

FSI-5PPAcad. year: 2010/2011

Strength limits of material - a follow up to the course Strength of Materials I. Brittle fracture criterion MOS. Solids with cracks, elements of Fracture Mechanics. Fatigue: basic material characteristics, basic methods of fatigue analysis. General theory of elasticity - stress, strain and displacement of an element of continuum. Equations of equilibrium, compatibility, constitutive equations and boundary conditions. Closed form solutions of elementary problems: thick walled cylinder, rotating disc, axisymmetrical plate, cylindrical shell with bending, axisymmetrical membrane shell. Introduction to numerical analysis of elastic bodies by the FEM. Experimental methods - overview.

Language of instruction

Czech

Number of ECTS credits

5

Mode of study

Not applicable.

Guarantor

prof. Ing. Jiří Burša, Ph.D.

Department

Institute of Solid Mechanics, Mechatronics and Biomechanics (ÚMTMB)

Learning outcomes of the course unit

Students will be able to select an appropriate method and solve typical problems of general strength and elasticity. They will acquire the knowledge of basic failure theories and can use it for prediction of structural behaviour.

Prerequisites

Mathematics: linear algebra, matrix notation, functions of one and more variables, calculus, ordinary and partial differential equations.
Basic knowledge of statics (especially equations of statical equilibrium and free body diagrams) and mechanics of materials (stress and strain tensors, elasticity theory of bars, plasticity criteria).

Co-requisites

Not applicable.

Planned learning activities and teaching methods

Teaching methods depend on the type of course unit as specified in the article 7 of BUT Rules for Studies and Examinations.

Assesment methods and criteria linked to learning outcomes

The course-unit credit is granted under the condition of active participation in seminars and passing the seminar tests of basic knowledge (at least 15 ECTS points out of 30 must be gained). The points gained in seminar tests are included in the final course evaluation.

Final examination: Written part of the examination plays a decisive role, where the maximum of 70 ECTS points can be reached. Solution of several computational problems is demanded. The problems come from typical profile areas of given subject and can be supplied by a theoretical question, proof, etc. The lecturer will specify exact demands like the number and types problems during the semester preceding the examination.

Final evaluation of the course is obtained as the sum of ECTS points gained in seminars and at the examination. To pass the course, at least 51 points must be reached.

Course curriculum

Not applicable.

Work placements

Not applicable.

Aims

The aim of the course is to provide students with information concerning solution of general problems of strength and elasticity of engineering structures. Analytical, numerical and experimental methods of solution are presented and final assessment of structural limit states is discussed in details.

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

Attendance at seminars is required. One absence can be compensated by attending a seminar with another group in the same week, or by working out an additional assignment. Longer absence is compensated by special tasks assigned by the tutor.

Recommended optional programme components

Not applicable.

Prerequisites and corequisites

Not applicable.

Basic literature

BUDYNAS, R. G. a NISBETT, J. K. Shigleyho konstruování strojních součástí. Brno: Vysoké učení technické v Brně – Nakladatelství VUTIUM, 2023. ISBN 978-80-214-5471-2.
JANÍČEK, P. a PETRUŠKA, J. Pružnost a pevnost II: Úlohy do cvičení. 3. vyd. Brno: Akademické nakladatelství CERM, 2007. ISBN 978-80-214-3441-7.
UGURAL, A. C. Plates and Shells: Theory and Analysis. 4th Ed. Boca Raton: CRC Press, 2018. ISBN 978-1-138-03245-3.

Recommended reading

Not applicable.

Classification of course in study plans

  • Programme B3901-3 Bachelor's

    branch B-MET , 3 year of study, winter semester, compulsory

  • Programme B2341-3 Bachelor's

    branch B-STI , 3 year of study, winter semester, compulsory-optional

Type of course unit

 

Lecture

39 hod., optionally

Teacher / Lecturer

doc. Ing. Zdeněk Florian, CSc.

Syllabus

1. Introduction. Assumptions of the analytical stress-strain analyses. Failure criteria - overview.
2. Criteria of brittle failure - Mohr and Maximum principal stress criteria.
3. Behaviour of a body with a crack - fundamentals of Linear Elastic Fracture Mechanics.
4. Fatigue characteristics of materials. Conceptions of fatigue life prediction.
5. General theory of elasticity - basic quantities and system of equations.
6. Basic types of problems of stress-strain analyses and their analytical solution.
7. Thick-walled cylindrical vessels.
8. Rotating discs.
9. Axisymmetric plates.
10.Axisymmetric membrane shells.
11.Bending theory of cylindrical shells.
12.Finite Element Method in problems of elasticity.
13.Experimental methods in mechanics.

Exercise

12 hod., compulsory

Teacher / Lecturer

doc. Ing. Tomáš Profant, Ph.D.
Ing. Jiří Hůlka, Ph.D.
Ing. Zdeněk Majer, Ph.D.
doc. Ing. Vladimír Fuis, Ph.D.
prof. Ing. Luboš Náhlík, Ph.D.

Syllabus

1. Criteria of plasticity.
2. Criteria of brittle fracture of a body without a primary crack.
3. Criterion of unstable crack propagation, LEFM.
4. Failure under cyclic loading, fatigue strength.
5. Fatigue under non-symmetrical stress cycle.
6. Fatigue under combined loading, safety in non-proportional loading.

Computer-assisted exercise

14 hod., compulsory

Teacher / Lecturer

prof. Ing. Jiří Burša, Ph.D.

Syllabus

1. Stable crack propagation, estimation of the residual life.
2. Thick-walled cylindrical vessels.
3. Rotating discs.
4. Axisymmetric plates.
5. Axisymmetric membrane shells.
6. Bending theory of cylindrical shells.
7. Example of FEM solution of the problem of elasticity .