Teilprojekt P6 - Fracture in Thermoplastics: Discrete-to-Continuum

Third Party Funds Group - Sub project

Overall project details

Overall project: Fracture across Scales: Integrating Mechanics, Materials Science, Mathematics, Chemistry, and Physics (FRASCAL)

Overall project speaker:
Prof. Dr.-Ing. Paul Steinmann (Lehrstuhl für Technische Mechanik)

Project Details

Project leader:
Dr.-Ing. Sebastian Pfaller
Prof. Dr. Ana-Suncana Smith

Project members:
Christof Bauer

Contributing FAU Organisations:
Graduiertenkolleg 2423 Skalenübergreifende Bruchvorgänge: Integration von Mechanik, Materialwissenschaften, Mathematik, Chemie und Physik
Lehrstuhl für Technische Mechanik
Physics Underlying Life Science
Zentralinstitut für Scientific Computing (ZISC)

Funding source: DFG / Graduiertenkolleg (GRK)
Acronym: GRK2423 - P6
Start date: 02/01/2019
End date: 30/06/2023

Research Fields

Material Mechanics
Lehrstuhl für Technische Mechanik
Multiscale mechanics
Lehrstuhl für Technische Mechanik

Abstract (technical / expert description):

Nanocomposites have great potential for various applications since their
properties may be tailored to particular needs. One of the most
challenging fields of research is the investigation of mechanisms in
nanocomposites which improve for instance the fracture toughness even at
very low filler contents. Several failure processes may occur like
crack pinning, bi-furcation, deflections, and separations. Since the
nanofiller size is comparable to the typical dimensions of the monomers
of the polymer chains, processes at the level of atoms and molecules
have to be considered to model the material behaviour properly. In
contrast, a pure particle-based description becomes computationally
prohibitive for system sizes relevant in engineering. To overcome this,
only e.g. the crack tip shall be resolved to the level of atoms or
superatoms in a coarse-graining (CG) approach.

Thus, this project aims to extend the recently developed multiscale
Capriccio method to adaptive particle-based regions moving
within the continuum. With such a tool at hand, only the vicinity of a
crack tip propagating through the material has to be described at CG
resolution, whereas the remaining parts may be treated continuously with
significantly less computational effort.

Last updated on 2019-03-05 at 09:09