Određivanje modula elastičnosti metalnih materijala jednoosnim vlačnim ispitivanjem

master's thesis

• Title (english): Determination of the modulus of elasticity of metallic materials using a uniaxial tensile test
• Author: Antonio Vrban
• Mentor: Željko Alar (mentor)
• Granter: University of Zagreb; Faculty of Mechanical Engineering and Naval Architecture; Zagreb
• Defense date and country: 2024-05-16, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Mechanical Engineering

Abstract

Ispitivanje materijala je ključno za razumijevanje i primjenu različitih inženjerskih i
tehnoloških koncepta. Mehanička svojstva materijala igraju važnu ulogu u određivanju njihove
primjene i performansi u različitim uvjetima. U ovom radu navedena su i objašnjena najvažnija
mehanička svojstava, te su o svakom svojstvu rečene najbitnije karakteristike, postupci
ispitivanja, važnost pri eksploataciji te su prikazani najvažniji dijagrami. Posebna pozornost
dana je statičkom vlačnom... More ispitivanju, te su prikazane stvarne i inženjerske krivulje naprezanja
i istezanja kao i formule za određivanje najbitnijih veličina. Navedene su standardne dimenzije
ispitnih uzoraka i njihovi oblici, te način uglavljivanja u kidalice, nakon čega su opisane glavne
vrste kidalica, ekstenzometara i mjernih traka. Poglavlje o statičko vlačnom ispitivanju
zaključeno je sa pravilima kojih se treba pridržavati kako bi se smanjila mjerna nesigurnost i
objašnjena je pravilna analiza podatka. Nadalje, opisane su glavne karakteristike modula
elastičnosti kojeg još nazivamo i Youngov modul. Objašnjene su metode promijene i izračuna
Youngovog modula. Također opisan je postupak analize i validacije softvera kojim se određuje
modul elastičnosti. Na kraju provedeno je i samo statičko vlačno ispitivanje na ranije
pripremljenim uzorcima te je napravljena analiza utjecaja brzine ispitivanja i hrapavosti
površine ispitnih uzoraka na rezultate statičkog vlačnog ispitivanja. Less

Abstract (english)

Material testing is crucial for understanding and applying various engineering and
technological concepts. The mechanical properties of materials play a significant role in
determining their application and performance under different conditions. In this work, the most
important mechanical properties are listed and explained, covering their key characteristics,
testing procedures, importance in exploitation, and presenting the most important diagrams.
Special attention is given... More to static tensile testing, including real and engineering stress-strain
curves, as well as formulas for determining key parameters. Standard dimensions of specimens
and their shapes, as well as the method of fitting into grips, are provided, followed by
descriptions of the main types of grips, extensometers, and measuring tapes. The chapter on
static tensile testing is concluded with rules to be followed to reduce measurement uncertainty,
and the proper data analysis is explained. Furthermore, the main characteristics of the modulus
of elasticity, also known as Young's modulus, are described, along with methods for its
determination and calculation. The process of analysis and validation of software used to
determine the modulus of elasticity is also described.. Finally, static tensile testing was
performed on previously prepared specimens, followed by an analysis of the impact of testing
speed and surface roughness of the specimens on the results of static tensile testing. Less

• Keywords: Mehanička svojstva; modul elastičnosti; ispitivanje materijala; statičko vlačno ispitivanje
• Keywords (english): Mechanical properties; modulus of elasticity; material testing; static tensile testing
• Language: croatian
• URN:NBN: urn:nbn:hr:235:350184
• Study programme: Title: Mechanical Engineering; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra inženjer/inženjerka strojarstva (magistar/magistra inženjer/inženjerka strojarstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2024-05-09 13:19:44