Blar i NTNU Open på forfatter "Morin, David"
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A novel tests set-up for validation of connector models subjected to static and impact loadings
Reil, Matthias; Morin, David; Langseth, Magnus; Knoll, Octavian (Peer reviewed; Journal article, 2021)A novel test set-up is presented for validation of hybrid connector models between steel and aluminium components subjected to static and impact loading. The proposed components consisted of two hat profiles in steel and ... -
Numerical implementation of a non-local GTN model for explicit FE simulation of ductile damage and fracture
Bergo, Sondre; Morin, David; Hopperstad, Odd Sture (Journal article, 2021)In this study, we follow the work of Tvergaard and Needleman (1995, 1997) and Needleman and Tvergaard (1998) and present the numerical implementation and initial applications of a non-local Gurson-Tvergaard-Needleman (GTN) ... -
Numerical Implementation of Brittle Failure Model for Glass
Næss, Nora Storebø (Master thesis, 2017)This thesis is concerned with a strength model for float glass. Failure of glass is usually initiated from surface flaws and the glass is reckoned as failed with the first failing flaw. The model implements a flaw map over ... -
A numerical study of a size-dependent finite-element based unit cell with primary and secondary voids
Espeseth, Vetle; Morin, David; Faleskog, Jonas; Børvik, Tore; Hopperstad, Odd Sture (Peer reviewed; Journal article, 2021)Aluminium alloys contain various types of intermetallic particles with different sizes, such as constituent particles and dispersoids. The main mechanism of ductile fracture in these materials is assumed to be nucleation ... -
Numerical study of ductile failure under non-proportional loading
Morin, David; Dæhli, Lars Edvard; Børvik, Tore; Benallal, Ahmed; Hopperstad, Odd Sture (Journal article; Peer reviewed, 2019)This paper investigates two numerical methods for predicting the initiation of ductile failure under moderately and strongly non-proportional loading paths. Two distinct phenomena are considered as indicators for the ... -
A Numerical Study on Ductile Failure of Porous Ductile Solids With Rate-Dependent Matrix Behavior
Dæhli, Lars Edvard Blystad; Morin, David; Børvik, Tore; Benallal, Ahmed; Hopperstad, Odd Sture (Peer reviewed; Journal article, 2020)This work examines the effects of loading rate on the plastic flow and ductile failure of porous solids exhibiting rate-dependent behavior relevant to many structural metals. Two different modeling approaches for ductile ... -
On the description of ductile fracture in metals by the strain localization theory
Morin, David; Hopperstad, Odd Sture; Benallal, Ahmed (Journal article; Peer reviewed, 2017)Numerical simulations based on the bifurcation and imperfection versions of the strain localization theory are used in this paper to predict the failure loci of metals and applied to an advanced high strength steel subjected ... -
On the effect of pilot holes on the mechanical behaviour of flow-drill screw joints. Experimental tests and mesoscale numerical simulations
Costas, Miguel; Morin, David; Sønstabø, Johan Kolstø; Langseth, Magnus (Peer reviewed; Journal article, 2021)This research work investigated in detail the mechanical performance of a flow-drill screw connection of two aluminium plates with and without pilot holes. An extensive experimental campaign involving material and joint ... -
On the effect of plastic anisotropy, strength and work hardening on the tensile ductility of aluminium alloys
Frodal, Bjørn Håkon; Morin, David; Børvik, Tore; Hopperstad, Odd Sture (Journal article; Peer reviewed, 2019)The influence of plastic anisotropy, yield strength and work hardening on ductile failure is studied by nonlinear finite element simulations and strain localization analyses of tensile tests in different material orientations. ... -
One the use of Machine Learning in the design of structures.
Botheim, Tor (Master thesis, 2022)FE-analyse kan tilnærmes på en maskin-lærings måte. Man kan tolke simuleringene som input til nevrale netverks modeller og forsøke å predikere en eller flere output. Denne masteroppgaven utforsker hvor godt modellene ... -
Plastmaterialer påkjent av skjærbelastning
Øygarden, Jesper (Master thesis, 2016)Hensikten med denne rapporten er å se på hvor godt en materialmodell beskriver materialoppførselen til en termoplast i skjær. Dette er gjort ved sammenligne resultatene fra plane skjærtester med med resultatene fra den ... -
A pragmatic orthotropic elasticity-based damage model with spatially distributed properties applied to short glass-fibre reinforced polymers
Holmström, Petter Henrik; Clausen, Arild Holm; Berstad, Torodd; Morin, David; Hopperstad, Odd Sture (Peer reviewed; Journal article, 2021)This article presents a simple progressive damage model for quasi-brittle materials, combining orthotropic elasticity with a scalar damage model including spatial variation of the damage initiation strain and the crack ... -
Prediction of failure parameters in porous aluminum alloys using artificial neural networks and finite element unit cells
Nordvik, Olav (Master thesis, 2021)Abstract will be available on 2024-06-29 -
Progressive collapse of buildings caused by explosion
Dalen, Fredrik Schjelderup (Master thesis, 2016)Extreme loading may cause failure or damage to structural building members. Redistribution of forces might propagate the local failure into a complete or partial progressive collapse of the building. The prevailing method ... -
Simulation of blast-loaded aluminium plates with crack-like defects
Granum, Henrik; Morin, David; Børvik, Tore; Hopperstad, Odd Sture (Chapter, 2019)This paper presents a numerical study on the response of blast-loaded AA6016 T4 aluminium plates with crack-like defects. Explicit finite element simulations were performed with LS-DYNA, using an uncoupled plasticity and ... -
Static and dynamic testing and modelling of aluminium joints with flow-drill screw connections
Sønstabø, Johan Kolstø; Morin, David; Langseth, Magnus (Journal article; Peer reviewed, 2018)A new component test suited for quasi-static and dynamic testing of flow-drill screw connections is presented. The component specimen was made of two different aluminium alloys, and included connections with two material ... -
Static crushing of aluminium tubes filled with PET foam and a GFRP skeleton. Numerical modelling and multiobjective optimization.
Costas, Miguel; Morin, David; Langseth, Magnus; Díaz, Jacobo M.; Romera, Luis Esteban (Journal article; Peer reviewed, 2017)This investigation focuses on the multiobjective optimization of a crash box subjected to static loading by using a validated numerical model and an analytical approach. The crash box is made with a unique combination of ... -
Strain localization and ductile fracture in advanced high-strength steel sheets
Gruben, Gaute; Morin, David; Langseth, Magnus; Hopperstad, Odd Sture (Journal article, 2017)An experimental-numerical approach is applied to determine the strain localization and ductile fracture of high-strength dual-phase and martensitic steel sheet materials. To this end, four different quasi-static material ... -
Tensile ductility of extruded aluminium alloy AA6063 in different tempers
Khadyko, Mikhail; Morin, David; Børvik, Tore; Hopperstad, Odd Sture (Journal article; Peer reviewed, 2018)The tensile ductility of the extruded aluminium alloy AA6063 in different tempers is investigated experimentally in this study. The results are correlated with the microstructure and the anisotropic plasticity of this ... -
Testing and modelling of butt-welded connections in thin-walled aluminium structures
Hoang, Nguyen-Hieu; Morin, David; Langseth, Magnus (Peer reviewed; Journal article, 2022)The present paper experimentally investigated the mechanical behaviour of butt-welded joints and evaluated suitable numerical approaches for modelling them in thin-walled structures with large shell-based models. Welded ...