Blar i NTNU Open på forfatter "Myhr, Ole Runar"
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A Combined Precipitation, Yield Stress, and Work Hardening Model for Al-Mg-Si Alloys Incorporating the Effects of Strain Rate and Temperature
Myhr, Ole Runar; Hopperstad, Odd Sture; Børvik, Tore (Journal article; Peer reviewed, 2018)In this study, a combined precipitation, yield strength, and work hardening model for Al-Mg-Si alloys known as NaMo has been further developed to include the effects of strain rate and temperature on the resulting stress–strain ... -
A Combined Thermal Cycle Software for Welded and Locally Heat Treated 6082 Aluminium Alloys
Olsen, John Reboli (Master thesis, 2020)Denne oppgaven dekker utviklingen av et kombinert termisk syklus-program for sveising og induksjon, Combined Weld and Induction Thermal Cycle software, som brukes til å estimere de termiske syklusene under sveising og lokal ... -
A microstructure-based yield stress and work-hardening model for textured 6xxx aluminium alloys
Khadyko, Mikhail; Myhr, Ole Runar; Dumoulin, Stephane; Hopperstad, Odd Sture (Journal article; Peer reviewed, 2016)The plastic properties of an aluminium alloy are defined by its microstructure. The most important factors are the presence of alloying elements in the form of solid solution and precipitates of various sizes, and the ... -
A nano-scale material model applied in finite element analysis of aluminium plates under impact loading
Johnsen, Joakim; Holmen, Jens Kristian; Myhr, Ole Runar; Hopperstad, Odd Sture; Børvik, Tore (Journal article, 2013)Finite element simulations of AA6070 aluminium plates struck by ogival-nose projectiles are performed. The aluminium plates are 20 mm thick and heat treated to temper O, T4, T6 and T7. A nano-scale material model, consisting ... -
Effect of pre-stretching on the mechanical behaviour of three artificially aged 6xxx series aluminium alloys
Granum, Henrik Møgster; Myhr, Ole Runar; Børvik, Tore; Hopperstad, Odd Sture (Peer reviewed; Journal article, 2021)The effect of pre-stretching on the mechanical behaviour of the aluminium alloys AA6063, AA6061 and AA6110 in temper T6 has been investigated. Uniaxial tensile tests and quasi-static axial crushing tests were conducted on ... -
Fatigue of Welded AA6082 Alloys - Effects of PWHT and Shot Peening
Utne, Sophie Caroline (Master thesis, 2013)Aluminum is a metal widely used in areas such as a construction material in buildings, transportation,oil and gas industry, in packaging for preserving food and drink, electric cables, heatexchangers and many other areas. ... -
Influence of stress state on plastic flow and ductile fracture of three 6000-series aluminium alloys
Thomesen, Susanne; Hopperstad, Odd Sture; Myhr, Ole Runar; Børvik, Tore (Journal article; Peer reviewed, 2020)In this study, the plastic flow and ductile fracture of three 6000-series aluminium alloys commonly used for crash components in the automotive industry are characterised experimentally and the observations are related to ... -
Mechanical Properties after Welding and Post Weld Heat Treatment of a 6082 Aluminium Alloy
Gjertsen, Sondre Borg (Master thesis, 2018)Lightweight materials are currently gaining popularity and are sought for by the construction and transportation industries. The heat-treatable 6xxxx series aluminium alloys are popular in lightweight products by combining ... -
Microstructure and Mechanical Properties of Welded AA6082 Aluminium Alloys
Jakobsen, Jonas Vestfjell (Master thesis, 2016)The present work have investigated variants of an AA6082 aluminium alloy. Five different alloys with various amounts of Mn, Cr and Zr have been subjected to three homogenization procedures. After homogenization, the aluminium ... -
Nanoscale modelling of combined isotropic and kinematic hardening of 6000 series aluminium alloys
Myhr, Ole Runar; Børvik, Tore; Marioara, Calin Daniel; Wenner, Sigurd; Hopperstad, Odd Sture (Peer reviewed; Journal article, 2020)Kinematic hardening is incorporated into a nanoscale model for 6000 series aluminium alloys consisting of three sub-models describing in turn precipitation of hardening particles, yield strength and work hardening. The ... -
Nanostructure-based finite element analyses of aluminium profiles subjected to quasi-static axial crushing
Granum, Henrik; Myhr, Ole Runar; Børvik, Tore; Hopperstad, Odd Sture (Journal article; Peer reviewed, 2018)In this study, a nanostructure model is used to predict the stress-strain curves of the aluminium alloys AA6063, AA6061 and AA6110 in T6, T7 and O tempers based on the chemical composition and the thermo-mechanical history. ... -
Perforation of welded aluminum components: Microstructure-based modeling and experimental validation
Holmen, Jens Kristian; Børvik, Tore; Myhr, Ole Runar; Fjær, Hallvard Gustav; Hopperstad, Odd Sture (Journal article; Peer reviewed, 2015)Perforation of welded aluminum structures by small-arms bullets is studied both experimentally and numerically in this paper. From the chemical composition, artificial aging history, and welding procedure, the spatial ... -
Perforation of welded aluminum extrusions: Numerical prediction and experimental validation
Holmen, Jens Kristian; Børvik, Tore; Myhr, Ole Runar; Hopperstad, Odd Sture (Journal article; Peer reviewed, 2015)A purely numerical procedure for predicting the perforation resistance of welded extruded AA6082-T6 aluminum profiles is presented in this study. The numerical work was conducted completely independent of the experimental ... -
Perforation of welded aluminum extrusions: Numerical prediction and experimental validation
Holmen, Jens Kristian; Børvik, Tore; Myhr, Ole Runar; Hopperstad, Odd Sture (Chapter, 2015)A purely numerical procedure for predicting the perforation resistance of welded extruded AA6082-T6 aluminum profiles is presented in this study. The numerical work was conducted completely independent of the experimental ... -
Possibilities of Improving the Structural Properties of Welded Al-Mg-Si Alloys Through Automated Local Induction Heat Treatments
Bugten, Andreas Voll (Master thesis, 2021)Det er et kjent fenomen at materialet i den varmepåvirkede sonen (HAZ) hos Al-Mg-Si-legeringer blir svekket etter sveising. Østhus et al. har designet et dataprogram som simulerer strekkprøving av sveiste Al-Mg-Si ... -
The role of quench rate on the plastic flow and fracture of three aluminium alloys with different grain structure and texture
Frodal, Bjørn Håkon; Christiansen, Emil; Myhr, Ole Runar; Hopperstad, Odd Sture (Journal article; Peer reviewed, 2020)The yielding, plastic flow and fracture of age hardenable aluminium alloys depend on the quench rate to room temperature after the solution heat-treatment at elevated temperature and before the artificial ageing. We ...