135 citations · 736 across the 27 of their papers we have counts for
27 papers
Harvesting Deformation Modes for Micromorphic Homogenization from Experiments on Mechanical Metamaterials
S. Maraghechi, O. Rokoš, R. H. J. Peerlings +2
A micromorphic computational homogenization framework has recently been developed to deal with materials showing long-range correlated interactions, i.e. displaying patterning mode…
Integrated Digital Image Correlation for Micro-Mechanical Parameter Identification in Multiscale Experiments
O. Rokoš, R. H. J. Peerlings, J. P. M. Hoefnagels +1
Micromechanical constitutive parameters are important for many engineering materials, typically in microelectronic applications and material design. Their accurate identification p…
Role of inter-fibre bonds and their influence on sheet scale behaviour of paper fibre networks
P. Samantray, R. H. J. Peerlings, T. J. Massart +2
In fibrous paper materials, an exposure to a variation in moisture content causes changes in the geometrical and mechanical properties. Such changes are strongly affected by the in…
A Newton Solver for Micromorphic Computational Homogenization Enabling Multiscale Buckling Analysis of Pattern-Transforming Metamaterials
S. E. H. M. van Bree, O. Rokoš, R. H. J. Peerlings +2
Mechanical metamaterials feature engineered microstructures designed to exhibit exotic, and often counter-intuitive, effective behaviour. Such a behaviour is often achieved through…
Level set based eXtended finite element modelling of the response of fibrous networks under hygroscopic swelling
P. Samantray, R. H. J. Peerlings, E. Bosco +3
Materials like paper, consisting of a network of natural fibres, exposed to variations in moisture, undergo changes in geometrical and mechanical properties. This behaviour is part…
Experimental Full-field Analysis of Size Effects in Miniaturized Cellular Elastomeric Metamaterials
S. Maraghechi, J. P. M. Hoefnagels, R. H. J. Peerlings +2
Cellular elastomeric metamaterials are interesting for various applications, e.g. soft robotics, as they may exhibit multiple microstructural pattern transformations, each with its…
Extended Micromorphic Computational Homogenization for Mechanical Metamaterials Exhibiting Multiple Geometric Pattern Transformations
O. Rokoš, M. M. Ameen, R. H. J. Peerlings +1
Honeycomb-like microstructures have been shown to exhibit local elastic buckling under compression, with three possible geometric buckling modes, or pattern transformations. The in…
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…
Application and adaptation of the truncated Newton method for non-convex plasticity problems
F. Bormann, R. H. J. Peerlings, M. G. D. Geers
Small-scale plasticity problems are often characterised by different patterning behaviours ranging from macroscopic down to the atomistic scale. In successful models of such comple…
Micromorphic Computational Homogenization for Mechanical Metamaterials with Patterning Fluctuation Fields
O. Rokoš, M. M. Ameen, R. H. J. Peerlings +1
This paper presents a homogenization framework for elastomeric metamaterials exhibiting long-range correlated fluctuation fields. Based on full-scale numerical simulations on a cla…
On Micromechanical Parameter Identification With Integrated DIC and the Role of Accuracy in Kinematic Boundary Conditions
O. Rokoš, J. P. M. Hoefnagels, R. H. J. Peerlings +1
Integrated Digital Image Correlation (IDIC) is nowadays a well established full-field experimental procedure for reliable and accurate identification of material parameters. It is…
Size effects in nonlinear periodic materials exhibiting reversible pattern transformations
M. M. Ameen, O. Rokoš, R. H. J. Peerlings +1
This paper focuses on size effects in periodic mechanical metamaterials driven by reversible pattern transformations due to local elastic buckling instabilities in their microstruc…
A bulge test based methodology for characterizing ultra-thin buckled membranes
Salman Shafqat, Olaf van der Sluis, Marc Geers +1
Buckled membranes become ever more important with further miniaturization and development of ultra-thin film based systems. It is well established that the bulge test method, gener…
Ultra-Stretchable Interconnects for High-Density Stretchable Electronics
Salman Shafqat, Johan P. M. Hoefnagels, Angel Savov +3
The exciting field of stretchable electronics (SE) promises numerous novel applications, particularly in-body and medical diagnostics devices. However, future advanced SE miniature…
Asymptotic homogenization of hygro-thermo-mechanical properties of fibrous networks
E. Bosco, R. H. J. Peerlings, M. G. D. Geers
The hygro-thermo-expansive response of fibrous networks involves deformation phenomena at multiple length scales. The moisture or temperature induced expansion of individual fibres…
Hygro-mechanical properties of paper fibrous networks through asymptotic homogenization and comparison with idealized models
E. Bosco, R. H. J. Peerlings, M. G. D. Geers
This paper presents a multi-scale approach to predict the effective hygro-mechanical behaviour of paper sheets based on the properties of the underlying fibrous network. Despite th…
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…