Browsing NTNU Open by Author "Elverum, Christer Westum"
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A new method for assessing anisotropy in fused deposition modeled parts using computed tomography data
Tronvoll, Sigmund Arntsønn; Vedvik, Nils Petter; Elverum, Christer Westum; Welo, Torgeir (Journal article; Peer reviewed, 2019)Voids in fused deposition modeled (FDM) parts are assumed to be a key driver for their anisotropic behavior. However, these assumptions are based on investigations of voids using only 2D data (microscopy images). This paper ... -
Development and Design of a New Lightweight Modular Flood Protection System
Bjørseth, Ine Lindbøl; Marthinussen, Kristine Nordahl (Master thesis, 2021)Flomsikringssystemer brukes for å forhindre skade på land og eiendom. Med en global økning i hendelser knyttet til flom, øker også behovet for beskyttelse. I denne oppgaven brukes Set-Based Design (SBD) til å utvikle ... -
Development and Design of a New Lightweight Modular Flood Protection System
Bjørseth, Ine Lindbøl; Marthinussen, Kristine Nordahl (Master thesis, 2021)Flomsikringssystemer brukes for å forhindre skade på land og eiendom. Med en global økning i hendelser knyttet til flom, øker også behovet for beskyttelse. I denne oppgaven brukes Set-Based Design (SBD) til å utvikle ... -
Development of an Open-Source High-Performance 3D Printer
Birkelid, Andreas Hagerup (Master thesis, 2021)Fused Filament Fabrication (FFF), mest kjent som 3D Printing, er en populær prosess for prototyping og produksjon. Etter hvert som nye polymerer med høy ytelse blir utviklet, slik som karbon-fiber forsterket (CF) nylon og ... -
Development of New Flood Protection Design
Fossheim, Emil (Master thesis, 2020)Denne oppgaven evaluerer konsepter for et forbedret design av flomvern-systemer utviklet av AquaFence AS. Hovedfokuset var å vurdere ulike løsninger for hovedpanelene som er brukt i systemet. Arbeidet ble utført ved grundig ... -
Dimensional accuracy of threads manufactured by fused deposition modeling
Tronvoll, Sigmund Arntsønn; Elverum, Christer Westum; Welo, Torgeir (Journal article; Peer reviewed, 2018)For parts manufactured by fused deposition modeling (FDM), helical threads drawn in accordance with normal standards (e.g. ISO 68-1), tend to end up deformed when manufactured. These dimensional imperfections typically ... -
Eliciting unknown unknowns with prototypes: Introducing prototrials and prototrial-driven cultures
Jensen, Matilde Bisballe; Elverum, Christer Westum; Steinert, Martin (Journal article; Peer reviewed, 2017)This paper maps and describes how prototypes are used to elicit requirements of unknown unknowns in industry. Eight engineering design companies serve as a dataset for a multi-case investigation. By semi-quantitatively ... -
Investigating pressure advance algorithms for filament-based melt extrusion additive manufacturing: theory, practice and simulations
Tronvoll, Sigmund Arntsønn; Popp, Sebastian; Elverum, Christer Westum; Welo, Torgeir (Journal article; Peer reviewed, 2019)Purpose – This paper aims to present the mathematical foundation of so-called advance algorithms, developed to compensate for defects during acceleration and deacceleration of the print head in filament-based melt extrusion ... -
Novel in-situ residual strain measurements in additive manufacturing specimens by using the Optical Backscatter Reflectometry
Wang, Shaoquan; Lasn, Kaspar; Elverum, Christer Westum; Wan, Di; Echtermeyer, Andreas (Journal article; Peer reviewed, 2020)Material extrusion (MEX) is a well established production method in additive manufacturing. However, internal residual strains are accumulated during the layer-by-layer fabrication process. They bring about shape distortions ... -
On Fuzzy Front End Prototyping and Testing of Complex Sensor Problems
Vestad, Håvard Nitter (Doctoral theses at NTNU;2022:99, Doctoral thesis, 2022)Norsk sammendrag Denne oppgaven er addresert til forskere og produktutviklere. Den har som hensikt å gi innsikt i løsing av komplekse sensorproblemer i the fuzzy front end av produktutvikling. Sensorer bygger bro mellom ... -
Prototype Experiments: Strategies and Trade-offs
Tronvoll, Sigmund Arntsønn; Elverum, Christer Westum; Welo, Torgeir (Journal article; Peer reviewed, 2017)Throughout the whole product development process, there is always a question on whether the proposed product is “up to its task”, and often it is up to the engineer or designer to answer these questions. In many cases, ... -
Revealing the influence of electron beam melted Ti-6Al-4V scaffolds on osteogenesis of human bone marrow-derived mesenchymal stromal cells
Ødegaard, Kristin Sirnes; Ouyang, Lingzi; Ma, Qianli; Buene, Glenn; Wan, Di; Elverum, Christer Westum; Torgersen, Jan; Standal, Therese; Westhrin, Marita (Peer reviewed; Journal article, 2021)Porous Titanium-6Aluminum-4Vanadium scaffolds made by electron beam-based additive manufacturing (AM) have emerged as state-of-the-art implant devices. However, there is still limited knowledge on how they influence the ... -
Structural and Biomedical Properties of Common Additively Manufactured Biomaterials: A Concise Review
Ødegaard, Kristin Sirnes; Torgersen, Jan; Elverum, Christer Westum (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, ... -
The effects of voids on structural properties of fused deposition modelled parts: a probabilistic approach
Tronvoll, Sigmund Arntsønn; Welo, Torgeir; Elverum, Christer Westum (Journal article; Peer reviewed, 2018)In the search to understand the functional capabilities and limitations of fused deposition modelling (FDM) manufactured components, control over their structural behaviour is crucial. For example, voids introduced during ...