• Zavarivanje i zavarene konstrukcije, Semester 1, position 2

After having completed the course, along with the theory and practical classes (through problems and calculation exersizes, seminars etc.), the student acquires the proper academic knowledge and skills in the field of weld design, and stress state analysis of the welded structure. The welded structures of interest are made of steel and aluminium alloys. In addition to the static calculation and design of welded structures, other fields of design include cases of fatigue loading, as well as dynamic loads. Particular design cases also include modern methods in evaluating the residual stresses and strains. Candidates shall be familiar with, and be able to apply their knowledge to real welded structures in exploitation. They should be familiar with modern scientific papers in the field, and are able to fully understand and keep track of scientific articles.

Upon the successful completion of the course, the students are able to: • Identify the loading types of welded structures • Analyze the stress state of the welded structure (also with the presence of complex loads) • Solve specific problems of calculating welded structures with both fillet and butt welded joints • Solve complex stress states, that evolve from a combination of different loading types (tension, bending, shear, torsion, restrained torsion) in both static and dynamic conditions • Solve problems in the calculation of fatigue loaded welded structures • Solve problems in the calculation of dynamically loaded (impact) welded structures • Solve problems in the calculation of welded structures with characteristic member sections – light-weight structures with thin cross sections, both open- and closed profile contour sections • Solve the implications that may arise in cases of poor design, or as a result of material structural damage • Connect the acquired knowledge from this field to the knowledge from other fields: engineering materials, mechanics, strength of materials, structural resistance, metal structures, welding technology, with applications in practice

Introduction. Theoretical basis of welded structures. Strength of materials basics. The basics of weld and structural design. Behaviour of welded structures at various types of loading. Design of welded structures in static loading conditions. Design of welded structures in dynamic (fatigue) loading conditions. Stress and strain states. Modern methods for measuring i determining the residual stress and strain state in the welded structure.

Static calculation and design of welded structures. Dynamic calculation and design of welded structures. Problem solving, examples, exercises. Application of standard codes for evaluating stress states at various loading types. Calculation of stress and strain states. Deformation and stress measurements. Tensometry and its application to welded structures. Examples of tensometric applications on welded structures with a retrospective view on some existing problems in practice.

Attended lectures and exercises: Strength of Materials, Mechanics, Resistance of Structures, Basics of Welding, and Engineering Materials 1 and 2.

1. Z. Petkovic, D. Ostric, Metallic Structures in the Machine Building Industry 1, University of Belgrade, Faculty of Mechanical Engineering, Belgrade, 1996 (or later). (in Serbian) 2. Z. Perovic, Welded Structures, University of Montenegro, Faculty of Mechanical Engineering, Podgorica, 2002 (or later) (in Serbian) 3. D. Ruzic, Strength of Structures, University of Belgrade, Faculty of Mechanical Engineering, Belgrade, 1996. (in Serbian) 4. Strength of Materials - Tables, Chair/Cabinet of the Theory of Structures, University of Belgrade, Faculty of Mechanical Engineering, Belgrade, 2000. (in Serbian) 5. Scripts/handouts from class lectures and exercises, and presentations in electronic format. 6. Internet resources.

Total assigned hours: 75

New material: 25
Elaboration and examples (recapitulation): 5

Auditory exercises: 0
Laboratory exercises: 0
Calculation tasks: 15
Seminar paper: 10
Project: 0
Consultations: 0
Discussion/workshop: 5
Research study work: 0

Review and grading of calculation tasks: 5
Review and grading of lab reports: 0
Review and grading of seminar papers: 5
Review and grading of the project: 0
Test: 0
Test: 2
Final exam: 3

Activity during lectures: 5
Test/test: 30
Laboratory practice: 0
Calculation tasks: 15
Seminar paper: 10
Project: 0
Final exam: 40
Requirement for taking the exam (required number of points): 40

Z. Petković, D. Ostrić, Metalne konstrukcije u mašinogradnji 1, izd. Univerzitet u Beogradu, Mašinski fakultet, Beograd, 1996.; Z. Perović, Zavarene konstrukcije, izd. Univerzitet Crne Gore, Mašinski fakultet, Podgorica, 2002; O.W. Blodgett, Design of Welded Structures, Publ. The James F. Lincoln Arc Welding Foundation, 1966.; T. Lassen, N. Récho, Fatigue Life Analyses of Welded Structures, ISTE Ltd, 2006.; Recommandations concernant les structures soudées en aluminium et alliages Al-Mg: doc. IIS/IIW-398-72 - révisé, Institut international de la soudure, Ed. 2, Publications de la Soudure Autogène (1980)