Browsing Articles by Author "Johnsen, Bernt Brønmo"
Now showing items 1-6 of 6
-
Effect of composite covering on ballistic fracture damage development in ceramic plates
Rahbek, Dennis Bo; Simons, Jeffrey W.; Johnsen, Bernt Brønmo; Kobayashi, Takao; Shockey, Donald A. (2017)This paper describes the damage development in ceramics with and without composite cover during ballistic impact. This is relevant for ceramic inserts in body armor that are often covered with a composite material. To study ... -
Fragmentation of an armour piercing projectile after impact on composite covered alumina tiles
Rahbek, Dennis Bo; Johnsen, Bernt Brønmo (2019-11-18)In a typical body armour system, a hard armour plate is often used in conjunction with a soft ballistic panel. The main purpose of the armour plate is to erode and fragment an impacting projectile, such as 7.62 mm armour ... -
Investigation of Theoretical Models for the Elastic Stiffness of Nanoparticle-Modified Polymer Composites
Thorvaldsen, Tom; Johnsen, Bernt Brønmo; Olsen, Torbjørn; Hansen, Finn Knut (2015)Mathematical models are investigated and suggested for the calculation of the elastic stiffness of polymer nanocomposites. Particular emphasis is placed on the effect on the elastic stiffness from agglomerates and the ... -
Non-destructive testing of graphene/epoxy composites using THz waves
Haakestad, Magnus W.; Johnsen, Bernt Brønmo; Dam, Anh Hoang; Mastin, Johann Roland M; Eid, Michel; Rheenen, Arthur Dirk van (2018-10-05)In earlier experiments [1] we found there was significant transmission of THz radiation through carbon-fiber enforced composites, despite that fact that the dc conductivity of the carbon fibers is expected to be good and ... -
Preparation and characterisation of epoxy/alumina polymer nanocomposites
Johnsen, Bernt Brønmo; Frømyr, Tomas Roll; Thorvaldsen, Tom; Olsen, Torbjørn (2013)The effect of adding nanosized alumina fillers of both fibre-like and spherical shapes to an epoxy polymer has been investigated. The alumina was dispersed in the epoxy hardener using two different sonication techniques. ... -
Surface treatment of alumina ceramic for improved adhesion to a glass fibre-reinforced polyester composite
Lausund, Kristian Blindheim; Johnsen, Bernt Brønmo; Rahbek, Dennis Bo; Hansen, Finn Knut (2015)The adhesion between an alumina ceramic and a glass fibre-reinforced polyester matrix composite has been investigated. The effect of various alumina surface treatments, including degreasing, etching, plasma, grit-blasting ...