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ILTOF06 - Application of fracture mechanics, fatigue and creep principles to avoid or predict failure in engineering problems

Course ILTOF06 - Application of fracture mechanics, fatigue and creep principles to avoid or predict failure in engineering problems

course summary (.pdf).

Lecturers:
Prof. ANDRZEJ NEIMITZ, Prof. JERZY OKRAJNI, Dr. IHOR DZIOBA, Dr. JAROSŁAW GAŁKIEWICZ, Dr. MARCIN GRABA

Introduction

1.0 Introduction to the course, Prof. A. Neimitz, 15 min

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FRACTURE MODULUS – 180 min

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2.1 Compendium on Fracture Mechanics – linear Fracture Mechanics
definitions, notation, ideas, criteria concerning the linear Fracture Mechanics – only
this material will be presented which will be used in the Fracture modulus of FITNET which will be presented in the chapter 3
Prof. A.Neimitz 35 min

2.2 Compendium on Fracture Mechanics – non-linear Fracture Mechanics
definitions, notation, ideas, criteria concerning the nonlinear Fracture Mechanics –
only this material will be presented which will be used in the Fracture modulus of
FITNET which will be presented in the chapter 3
Prof. A.Neimitz 25 min

3.1 Introduction to the FITNET and steps of analysis
Introduction to the FITNET procedure. The philosophy of the FITNET-Fracture modulus. The FAD approach. The CDF approach. Short description of the steps of analysis, within the Fracture modulus of FITNET.
Dr. I.Dzioba 20 min

3.2 Modeling Modeling of cracks.
Modeling of primary and secondary stress.
Dr. I.Dzioba 20 min

3.3 Tensile and fracture properties
How to measure and compute the tensile and fracture properties which will be used in the analysis.
Dr. I.Dzioba 15 min

3.4 Stress intensity factor and limit load
Computations of the effective SIF and limit load both for the primary and secondary stresses.
Dr. I.Dzioba 10 min

3.5 FAD curves equations
About the FAD curves for six options of analysis
Dr. I.Dzioba 15 min

3.6 Analysis of the results
Analysis of the results and the sensitivity analysis
Dr. I.Dzioba 20 min

FATIGUE MODULUS - 140 min

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4.0 Compendium on fatigue
definitions, notation, ideas, criteria – introduction to the FITNET Fatigue modulus
Prof. A.Neimitz 30 min

5.1 General description of the Fatigue modulus of the FITNET procedure.
Structure of Fatigue modulus, Short characteristics of each route and basic features that are in common for different routes and were not described in chapter 3: Compendium on fatigue
Dr. J.Gałkiewicz 20 min

5.2 Example route for fatigue assessment of welded component
Detailed characteristics of route 1a of Fatigue modulus of the FITNET procedure. Step-by-step description of the procedure for route 1a.
Dr. J.Gałkiewicz 30 min

5.3 Example route for fatigue assessment of non-welded component
Detailed characteristics of route 2b. Step-by-step description of procedure for route 2b. This route is for the uniform materials under constant and variable amplitude cyclic loading.
Dr. J.Gałkiewicz 30 min

5.4 Fatigue crack growth assessment
Exact characteristics of route 4 of the Fatigue modulus of FITNET. It concerns the fatigue crack growth. It is step-by-step description of the procedure for the route 4
Dr. J.Gałkiewicz 30 min

CREEP MODULUS– 150 min.

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6.1 Compendium on creep
Characteristics of creep process. Definitions, notations. Mechanisms of creep.
Prof. J.Okrajni 20 min to be released

6.2 Damage accumulation
Description of damage accumulation process. Damage models and lifetime prediction of bodies without cracks.
Prof. J. Okrajni 20 min to be released

6.3 Reference stress
Reference stress definition for bodies without cracks. Example – the beam
subjected to a constant
bending moment
Prof. J. Okrajni 20 min to be released

6.4 Reference stress for bodies with cracks
Reference stress definition for bodies with cracks. Backgrounds and description of FAD in the reference stress concept.
Prof. J. Okrajni 30 min to be released

6.5 Creep fracture mechanics
Definitions, notations, ideas, criteria concerning the Creep Fracture Mechanics.
Prof. J. Okrajni 30 min to be released

7.1 FITNET creep module
Creep modulus of FITNET will be presented. The procedure with proper flowcharts will be discussed using formulas and ideas presented in the lectures 5.1-5.5.
Prof. J. Okrajni 30 min to be released

CASE STUDIES – 75 min

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8.1 Fracture Application of the FITNET procedure;
presentation of the validation study of the FITNET procedure for the assessment of the critical state of the welded plates containing cracks in tension;
M.Graba 25 min

8.2 Fatigue Application of the FITNET procedure;
presentation of the fatigue route No. 3, which was applied for the non-welded components (local stress-strain approach) which did not contain cracks. Low cycle fatigue case.
M.Graba 25 min

8.3 Creep Application of the FITNET procedure;
validation of the procedure for the cylindrical pipe which contains an internal crack under cyclic loading
M.Graba 25 min to be released