Analiza metoda rendgenske i neutronske difrakcije za mjerenje zaostalih naprezanja

undergraduate thesis

• Title (english): Analysis of X - ray and neutron diffraction test methods for residual stress measurement
• Author: Kristijan Nemec
• Mentor: Ivica Garašić (mentor)
• Granter: University of Zagreb; Faculty of Mechanical Engineering and Naval Architecture; Zagreb
• Defense date and country: 2021-09-29, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Mechanical Engineering

Abstract

Završni rad bavi se numeričkom analizom zavarenih spojeva s posebnim naglaskom na analizu
zaostalih naprezanja i deformacija koje nastaju kao posljedice procesa zavarivanja. Završni rad
sastoji se od dva dijela, teorijskog i praktičnog. U teorijskom dijelu definirani su i pojašnjeni
pojmovi zaostalih naprezanja i deformacija. U radu se posebno naglašava kakav utjecaj
navedeni pojmovi imaju na radni komad. Nadalje, opisane su metode određivanja zaostalih
naprezanja, a poseban naglasak je stavljen na neutronsku i rendgensku difrakcijsku metodu.
Obrađuju se i norme HRN EN ISO 21432:2020 i HRN EN 15305:2008, a na samom kraju
teorijskog dijela rada opisuju se i metode kojima je moguće smanjiti zaostala naprezanja i
deformacije.
Drugi dio završnog rada posvećen je eksperimentalnom dijelu u kojem se prema odabranom
realnom komadu izrađuje model u programskom paketu Visual – Environment. Pravilnom
izradom modela moguće je pokrenuti simulaciju pomoću koje se dobiva uvid u raspodjelu i
iznos zaostalih naprezanja

Abstract (english)

This undergraduate thesis deals with numerical analysis of welded joints with special emphasis
on the analysis of residual stresses and strains. This undergraduate thesis consists of two parts,
theorethical and practical. In the theoretical part, the concepts of residual stresses and strains
are defined. The undergraduate thesis emphasizes the influence of these terms on the
workpiece. Furthermore, methods for determining residual stresses are described, with special
emphasis on the neutron and X – ray diffraction methods. The norms HRN EN ISO 21432:2020
and HRN EN 15305:2008 are also discussed, and at the end of the theoretical part, the methods
by which it is possible to reduce residual stresses and strains are described.
The second part of the undergraduate thesis is dedicated to the experimental part in which a
model in the Visual – Environment software package is created according to the selected real
piece. With the correct construction of the model, it is possible to run a simulation that provides
insight into the distribution and level of residual stresses

• Keywords: Zaostala naprezanja; deformacija; neutronska difrakcija; rendgenska difrakcija
• Keywords (english): residual stresses; deformation; neutron diffraction; X – ray diffraction
• Language: croatian
• URN:NBN: urn:nbn:hr:235:516084
• Study programme: Title: Mechanical Engineering; Study programme type: university; Study level: undergraduate; Academic / professional title: sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka strojarstva (sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka strojarstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2021-09-23 07:22:54