Blar i NTNU Open på forfatter "Andreassen, Erik"
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A novel prototyping technique for non-imaging optics.
Lerberg, Bjørn Torjus Nygard (Master thesis, 2023)Denne studien undersøker et innovativt alternativ til å direkte 3D-printe non-imaging optiske prototyper. Ved å benytte kommersielt tilgjengelig 3D-printeteknologier og enkle verktøy, presenterer studien en kreativ ... -
Adhesion between thermoplastic elastomers and polyamide‐12 with different glass fiber fractions in two‐component injection molding
Persson, Anna-Maria Märta Ruth; Hinrichsen, Einar L; Andreassen, Erik (Peer reviewed; Journal article, 2020)The usage of thermoplastic elastomers (TPEs) is increasing, and integrated hard‐soft parts can be mass produced by two‐component injection molding (or sequential molding). A key property of such parts, the adhesion between ... -
Cyclic Compression Testing of Three Elastomer Types— A Thermoplastic Vulcanizate Elastomer, a Liquid Silicone Rubber and Two Ethylene-Propylene-Diene Rubbers
Persson, Anna-Maria Märta Ruth; Andreassen, Erik (Peer reviewed; Journal article, 2022)Thermoplastic elastomer vulcanizate (TPV) and liquid silicone rubber (LSR) are replacement candidates for ethylene-propylene-diene rubbers (EPDM), as they offer the possibility for twocomponent injection moulding. In this ... -
Determination of Anisotropic Mechanical Properties for Materials Processed by Laser Powder Bed Fusion
Hovig, Even Wilberg; S. Azar, Amin; Grytten, Frode; Sørby, Knut; Andreassen, Erik (Journal article; Peer reviewed, 2019)Improving the success rate in additive manufacturing and designing highly optimized structures require proper understanding of material behaviour. This study proposes a novel experimental method by which anisotropic ... -
High cycle fatigue life estimation of AlSi10Mg processed by laser powder bed fusion
Hovig, Even Wilberg; S. Azar, Amin; Sunding, Martin Fleissner; Sørby, Knut; M'hamdi, Mohammed; Andreassen, Erik (Journal article; Peer reviewed, 2018)Fatigue life is known to be dependent on the surface properties of the material. Surface roughness provokes local stress concentration and cause crack initiation even at minute cyclic loads. In laser powder bed fusion, the ... -
High cycle fatigue life estimation of materials processed by laser powder bed fusion
Hovig, Even Wilberg; S. Azar, Amin; Sunding, Martin Fleissner; Andreassen, Erik; Sørby, Knut (Journal article, 2019)The fatigue life of metal components is known to depend on the surface topography. For components made by laser powder bed fusion, the roughness of the as‐built surfaces depends on the orientation of the component surface ... -
Machine Learning of Quality Assurance in Polymer Powder Bed Fusion Additive Manufacturing
Baturynska, Ivanna (Doctoral theses at NTNU;2020:120, Doctoral thesis, 2020)The latest developments in the field of additive manufacturing (AM) have led to the wider use of this technology for the production of end-user products. As a result, more stringent requirements are set to the quality of ... -
Mechanical performance of thermoplastic elastomers for two-component injection moulding
Persson, Anna-Maria Märta Ruth (Doctoral theses at NTNU, 2022:350, Doctoral thesis, 2022)The thesis is based on studies of the mechanical properties of thermoplastic elastomers (TPEs). A TPE is a soft thermoplastic polymer material with rubber-like properties. Vulcanizate TPEs (TPVs) were selected as the main ... -
On the temperature dependence of the cyclic compression behaviour of a thermoplastic vulcanizate elastomer
Persson, Anna-Maria Märta Ruth; Hinrichsen, Einar L; Andreassen, Erik (Peer reviewed; Journal article, 2022)Effects of temperature on the uniaxial cyclic compression of a polypropylene based thermoplastic vulcanizate were studied in the range −40 °C–100 °C. The effect of temperature on the stress level was similar to that on the ...