Institutt for maskinteknikk og produksjon
Recent Submissions
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Structural and Biomedical Properties of Common Additively Manufactured Biomaterials: A Concise Review
(Peer reviewed; Journal article, 2020)Biomaterials are in high demand due to the increasing geriatric population and a high prevalence of cardiovascular and orthopedic disorders. The combination of additive manufacturing (AM) and biomaterials is promising, ... -
Entropy production beyond the thermodynamic limit from single-molecule stretching simulations
(Peer reviewed; Journal article, 2020)Single-molecular systems are a test bed to analyze to what extent thermodynamics applies when the size of the system is drastically reduced. Isometric and isotensional single-molecule stretching experiments and their ... -
Subsea power cable sheathing: an investigation of lead fatigue performance
(Peer reviewed; Journal article, 2020)The protection of subsea power cables against electrical failure is achieved by the use of a watertight layer. Due to its properties of chemical stability and ductility, lead has been the material of choice for this purpose ... -
Detecting glass and metal in consumer trash bags during waste collection using convolutional neural networks
(Peer reviewed; Journal article, 2020)We present a proof-of-concept method to classify the presence of glass and metal in consumer trash bags. With the prevalent utilization of waste collection trucks in municipal solid waste management, the aim of this method ... -
Følgeforskning av planprosjektet E18 Dørdal – Grimstad
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Effect of laser structured micro patterns on the polyvinyl butyral/oxide/steel interface stability
(Peer reviewed; Journal article, 2020)This work investigated the effect of steel substrate topography and roughness on cathodic disbonding resistance and wet adhesion of the polyvinyl butyral/oxide/steel interface. Laser structuring was employed to pattern ... -
Dynamic Simulation of a Mooring Catenary Based on the Lumped-Mass Approach: OpenModelica and Python Implementations
(Chapter, 2020)In this paper, the theoretical background behind the formulation and solution of a discretized lumped-mass mathematical-model of the physically continuous and inelastic mooring catenary is re-visited. The drag term of the ... -
A First Approach on Modelling the Thermal and Microstructure Fields During Aluminium Butt Welding Using the HYB PinPoint Extruder
(Peer reviewed; Journal article, 2020)Hybrid metal extrusion & bonding (HYB) is a new solid-state joining method for metals and alloys that utilizes continuous extrusion as a technique to enable aluminium filler metal additions. In the HYB case, heat is generated ... -
Mayday, Mayday, Mayday: Using salivary cortisol to detect distress (and eustress!) in critical incident training
(Peer reviewed; Journal article, 2020)The understanding of stress and its impact on human performance is crucial to mitigate human error in the face of a threat. This is especially the case for critical incidents on a ship bridge, where human error can easily ... -
Beyond the 2D limit: étendue-squeezing line-focus solar concentrators
(Peer reviewed; Journal article, 2020)Line-focus solar concentrators are commonly designed by extruding a two-dimensional concentrator in the third dimension. For concentration in air, these concentrators are, by the nature of their design, limited by the ... -
The Puzzle of Project Transaction Costs - Optimising project transaction costs through client-contractor collaboration
(Doctoral theses at NTNU;2021:5, Doctoral thesis, 2021)Kostnadsoverskridelser er et gjentakende problem i bygg- og anleggsnæringen, både nasjonalt og internasjonalt. Totalkostnad i et prosjekt er summen av prosjektets produksjons- og transaksjonskostnader. Med produksjonskostnader ... -
Use of the Critical Acidification Model to Estimate the Influence of W in the Localized Corrosion Resistance of 25Cr Super Duplex Stainless Steels
(Peer reviewed; Journal article, 2020)Two super duplex stainless steels (SDSS) with different W content, namely UNS S32750 (W-free) and UNS S39274 (2.1 wt.% W), were tested in simulated crevice corrosion environments to determine the influence of W on their ... -
Crevice corrosion of solution annealed 25Cr duplex stainless steels: Effect of W on critical temperatures
(Peer reviewed; Journal article, 2021)In this work, the influence of tungsten on the crevice corrosion resistance of three super duplex stainless steels (SDSS) containing 0.0, 0.6, and 2.1 wt.% W was determined. The PD-GS-PD technique was used to estimate the ... -
Ionic Liquids as Additives in Water‑Based Lubricants: From Surface Adsorption to Tribofilm Formation
(Peer reviewed; Journal article, 2020)Ionic liquids (ILs) are potential lubricant additives that can potentially perform simultaneously as friction modifiers and anti-wear agents. In addition, they possess good thermal stability, they are non-flammable, they ... -
Analytical springback assessment in flexible stretch bending of complex shapes
(Peer reviewed; Journal article, 2020)Stretch bending is commonly used in the fabrication of profile-based shapes. However, one of the challenges in many bending-type forming processes is controlling springback upon unloading. Springback appears sensitive to ... -
Prototyping Cyber-Physical Systems using Wayfaring - An Experiment and Insights for Early-Stage Development
(Doctoral theses at NTNU;2020:389, Doctoral thesis, 2020)The two main aims of the thesis are firstly to qualitatively and quantitatively research the effect of using a prototype-driven wayfaring approach for the early-stage development of cyber-physical systems to give normative ... -
Improving and implementing the STEP ISO 10303 standard for design, analysis and structural test data correlation
(Doctoral theses at NTNU;2020:416, Doctoral thesis, 2020)The objective of this thesis was to improve the effectiveness of data management of physical test and simulation data, in the context of digital twins, PDM (Product Data Management)/PLM (Product Lifecycle Management) and ... -
Using ANN in emergency reconstruction projects post disaster
(Peer reviewed; Journal article, 2020)The purpose of this study is to avoid delays and cost changes that occur in emergency reconstruction projects especially in post disaster circumstances. This study is aimed to identify the factors that affect the real ... -
Identification and Optimal Control for Surge and Swab Pressure Reduction While Performing Offshore Drilling Operations
(Peer reviewed; Journal article, 2020)In this paper, an unscented Kalman filter (UKF) coupled with a nonlinear model-predictive controller (NMPC) for a hydraulic wellbore model with multi-variable control and tracking is presented. In a wellbore, high drill ... -
New approaches to solar tracking and concentration through numerical optimization of lens arrays
(Doctoral theses at NTNU;2020:405, Doctoral thesis, 2020)Solar concentrators are essential for enabling several solar energy applications, including high-efficiency photovoltaic conversion and high-temperature solar thermal energy. These concentrators require accurate solar ...
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