Ragnar Larsson



​Professor
DEpartment of Industrial and Materials Science
Division of Material and Computational Mechanics
​Email: ragnar@chalmers.se
Phone: +46 31 772 5267
Office: Hörsalsvägen 7b, 3rd Floor
 
Research focus:
“Computational material mechanics” including material and structural modelling of composites, multi-scale modelling, damage and failure mechanics. “Composites processing” including effects of graphene fillers, Interface mechanics of microsystem integration including atomistic-continuum modeling with application to graphene.

Theoretical methods:
“Continuum mechanics”, “Computational material mechanics”, “Computational homogenization of microstructures”, “Localization of deformations”, “Interface modeling including contact with friction”, “Damage and fracture mechanics”, “Shell modeling”, “Porous media theory”, “FE-technology”.

Focus of future research:
Within our active field of composites process modeling and simulation our priorities are related to
  • Infusion modelling – preforms with long/medium/short fibers at high volume fractions
    • Infusion/material/flow modelling – thin-walled preforms
    • Problems: degree of wet-out as induced by filler content relating to both graphene and wood based additives, fiber content, viscosity, porosity, optimized cycle time wrt component.
  • Matrix enhanced by filler (graphene and wood based additives)
    • Modeling of 2D elements, embedded in bulk
    • Dispersion, Multiphase flow, viscosity
    • Curing/polymerization modeling

Highlights of previous research:
  • R Larsson, M Wysocki, S Toll, Process-modeling of composites using two-phase porous media theory, European Journal of Mechanics-A/Solids 23 (1), 15-3
  • R Larsson, K Samadikhah, Atomistic continuum modeling of graphene membranes, Computational Materials Science 50 (5), 1744-175
  • R Larsson, Y Zhang, Homogenization of microsystem interconnects based on micropolar theory and discontinuous kinematics, Journal of the Mechanics and Physics of Solids 55 (4), 819-84
  • M Fagerström, R Larsson, A thermo-mechanical cohesive zone formulation for ductile fracture, Journal of the Mechanics and Physics of Solids 56 (10), 3037-3058
 

Published: Tue 20 Feb 2018.