135 citations · 736 across the 27 of their papers we have counts for
9 papers · 1 filter
Controlled irradiation hardening of tungsten by cyclic recrystallization
A. Mannheim, J. A. W. van Dommelen, M. G. D. Geers
The economical lifetime of the divertor is a key concern for realizing nuclear fusion reactors that may solve the world's energy problem. A main risk is thermo-mechanical failure o…
Long-term microstructural evolution of tungsten under heat and neutron loads
A. Mannheim, J. A. W. van Dommelen, M. G. D. Geers
In nuclear fusion reactors, tungsten will be exposed to high neutron loads at high temper atures (>900 C). The evolution and degradation of the mechanical properties under these co…
On the competition between dislocation transmission and crack nucleation at phase boundaries
F. Bormann, R. H. J. Peerlings, M. G. D. Geers
The interaction of dislocations with phase boundaries is a complex phenomenon, that is far from being fully understood. A 2D Peierls-Nabarro finite element (PN-FE) model for studyi…
Fracture initiation in multi-phase materials: a systematic three-dimensional approach using a FFT-based solver
T. W. J. de Geus, M. Cottura, B. Appolaire +2
This paper studies a two-phase material with a microstructure composed of a hard brittle reinforcement phase embedded in a soft ductile matrix. It addresses the full three-dimensio…
Systematic and objective identification of the microstructure around damage directly from images
T. W. J. de Geus, C. Du, J. P. M. Hoefnagels +2
An original experimental approach is presented to automatically determine the average phase distribution around damage sites in multi-phase materials. An objective measure is found…
Microstructural modeling of ductile fracture initiation in multi-phase materials
T. W. J. de Geus, R. H. J. Peerlings, M. G. D. Geers
The precise mechanisms underlying the failure of multi-phase materials may be strongly dependent on the material's microstructural morphology. Micromechanical modeling has provided…
Microstructural topology effects on the onset of ductile failure in multi-phase materials - a systematic computational approach
T. W. J. de Geus, R. H. J. Peerlings, M. G. D. Geers
Multi-phase materials are key for modern engineering applications. They are generally characterized by a high strength and ductility. Many of these materials fail by ductile fractu…
Fracture in multi-phase materials: why some microstructures are more critical than others
T. W. J. de Geus, R. H. J. Peerlings, M. G. D. Geers
Our goal is to unravel the mechanisms that lead to failure of a ductile two-phase material - that consists of a ductile soft phase and a relatively brittle hard phase. An idealized…
Fracture initiation in multi-phase materials: a statistical characterization of microstructural damage sites
T. W. J. de Geus, J. E. P. van Duuren, R. H. J. Peerlings +1
Understanding the microstructural influence on the failure mechanisms in multi-phase materials calls for the identification of the worst-case scenario. This necessitates a statisti…