• Zavarivanje i zavarene konstrukcije, Semester 2, position 3

The objectives of the course are that students, after completing theoretical classes in fracture mechanics, as well as maximum engagement in practical classes (through laboratory exercises, calculation tasks, seminar papers, etc.), become competent in the field of structural integrity and acquire appropriate academic skills. they also develop creative abilities and master the specific practical skills needed to practice the profession.

By mastering the study program, provided by the curriculum, the student is able to solve specific problems of structural integrity, as well as to see the possible consequences that may occur in case of poor solutions. The student is also able to connect the acquired knowledge in this field with other areas and apply them in practice.

Theoretical classes: Introduction. Fundamentals of fracture mechanics. Stresses and strains in the body with a crack. Linear elastic and elasto-plastic fracture mechanics. Fracture mechanics parameters. Stress intensity factor, crack tip opening, J integral. Application of fracture mechanics to structural integrity assessment. Welded joint as a crack site. Integrity of welded structures. Estimates in the domain of elasticity and elasto-plasticity. Crack growth force with respect to material resistance curves.

Practical classes: Determining the parameters of fracture mechanics in the elastic and elasto-plastic areas. Experimental, numerical and analytical methods. Standard procedures for measuring fracture mechanics parameters, such as material properties. Fracture analysis diagram and its application to welded joints and structures. Assessment of the integrity of a given construction using all acquired knowledge.

necessary: Mechanical materials 1 and 2, Material resistance, Mechanics, Fundamentals of structural resistance

[1] Handouts

Total assigned hours: 75

New material: 20
Elaboration and examples (recapitulation): 10

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

Review and grading of calculation tasks: 4
Review and grading of lab reports: 0
Review and grading of seminar papers: 0
Review and grading of the project: 0
Test: 4
Test: 4
Final exam: 3

Activity during lectures: 5
Test/test: 30
Laboratory practice: 0
Calculation tasks: 30
Seminar paper: 0
Project: 0
Final exam: 35
Requirement for taking the exam (required number of points): 30

A. Sedmak, Application of fracture mechanics to the assessment of structural integrity, 2003 monograph, Faculty of Mechanical Engineering, Belgrade, ISBN: 86-7083-473-1, language: Serbian; N. Milošević, Handouts from lectures, 2022. electronic version, Faculty of Mechanical Engineering, Belgrade, language: Serbian