Course detail

Limit States of Metallic Structures

FSI-RMK Acad. year: 2023/2024 Winter semester

Limit states – their general classification, limit states in strength analysis. Fatigue of structures, basic characteristics, durability assessment of service life under low-cycle and high-cycle fatigue. The most important concepts of linear-elastic and elasto-plastic fracture mechanics. Evaluation of the resistance of structures to brittle failure at the stage of their design. Assessment of the crack as a defect under monotonic and cyclic stresses.

Language of instruction

Czech

Number of ECTS credits

7

Supervisor

Ing. Petr Vosynek, Ph.D.

Department

Institute of Solid Mechanics, Mechatronics and Biomechanics

Entry knowledge

Static structural analysis of beam bodies.
Empirical calculation of machine parts.
Static structural analysis of parts using finite element method.
Material characteristics of metallic materials (without a crack and with crack) in terms of monotonic and cyclic loading and also in terms of reduced, normal, and elevated temperature.

Rules for evaluation and completion of the course

Active participation in seminars and elaboration of assigned semester projects is required for granting the credit. The exam consists of a written part in the form of test questions and, if necessary, an oral part.
Attendance at seminars is mandatory. A one-time absence can be replaced by exercising with another group in the same week or by working on a substitute assignment. Prolonged absence is replaced by a special assignment according to the instructions of the instructor or lecturer.

Aims

The objective of the course is to make students familiar with the concepts and characteristics of limit states. From the extensive set of limit states, increased attention will be paid only to the most common limit states, ie limit states of fatigue and brittle failure with respect to current methods, standards, and regulations.
Gaining an overview of the limit states during the design and assessment of metal structures. In further technical practice, graduates will be able to specify the individual steps of assessment according to the necessary regulations, standards or guidelines.

The study programmes with the given course

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

prof. Ing. Pavel Hutař, Ph.D.
Ing. Petr Vosynek, Ph.D.

Syllabus

 Introduction to the course. The definition and classification of the limit states.
 A set of selected limit states of technical objects.
 Concept (philosophy) of design and assessment, plan to ensure the integrity of the structure.
 Failure during cyclic loading without a crack.
 Subcritical crack growth.
 Brittle fracture.

Computer-assisted exercise

26 hours, compulsory

Teacher / Lecturer

Ing. Petr Vosynek, Ph.D.

Syllabus

 Fatigue assessment of welded joints without a crack.
 Fatigue assessment of welded joints with a crack.
 Fatigue assessment of notched part in the high cyclic region.
 Fatigue assessment of notched part in the low cyclic region.
 Use of linear elastic fracture mechanics parameters to calculate service life.
 Determination of the value of the J-integral using FEM and its use.
 Use of a fracture diagram when assessing a body with a crack.
 Credit.