Searched for: author:"Sluys, L.J."
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Liu, Y. (author), van der Meer, F.P. (author), Sluys, L.J. (author)
An asymptotic homogenization model considering wave dispersion in composites is investigated. In this approach, the effect of the microstructure through heterogeneity-induced wave dispersion is characterised by an acceleration gradient term scaled by a “dispersion tensor”. This dispersion tensor is computed within a statistically equivalent...
journal article 2019
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li Piani, T. (author), Weerheijm, J. (author), Sluys, L.J. (author)
Buildings and structures in many cities have recently been exposed to an increased number of highly dynamic hazards. These include not only floods and earthquakes but also man made threats such as ballistic impacts and blasts. Thus, the assessment of the dynamic performance of structures made of quasi-brittle materials must account also for high...
abstract 2019
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li Piani, T. (author), Weerheijm, J. (author), Peroni, M. (author), Koene, L. (author), Solomos, G. (author), Sluys, L.J. (author)
Adobe is one of the most ancient forms of masonry. Adobe bricks are sundried mixtures of clay, silt, sand and natural fibres locally available joined together using mud mortar. Adobe structures are largely spread in areas of the world prone to earthquakes or involved in military conflicts. Unfortunately, almost no literature concerns the dynamic...
conference paper 2019
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Simons, E.C. (author), Weerheijm, J. (author), Sluys, L.J. (author)
Alumina ceramic is often used in armour systems. This material is known to have a brittle response under tensile loading, while a ductile response is found when sufficiently high pressures are reached. During projectile impact a ceramic material experiences both tensile loading and high pressures, hence fails in both a brittle and ductile way....
journal article 2019
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Dekker, R. (author), van der Meer, F.P. (author), Maljaars, J. (author), Sluys, L.J. (author)
Structures are subjected to cyclic loads that can vary in direction and magnitude, causing constant amplitude mode I simulations to be too simplistic. This study presents a new approach for fatigue crack propagation in ductile materials that can capture mixed-mode loading and overloading. The extended finite element method is used to deal with...
journal article 2019
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Rocha, I.B.C.M. (author), van der Meer, F.P. (author), Raijmaekers, S (author), Lahuerta, F (author), Nijssen, R. P.L. (author), Mikkelsen, L. P. (author), Sluys, L.J. (author)
This work investigates hygrothermal aging degradation of unidirectional glass/epoxy composite specimens through a combination of experiments and numerical modeling. Aging is performed through immersion in demineralized water. Interlaminar shear testes are performed after multiple conditioning times and after single immersion/redrying cycles....
journal article 2019
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Latifi, M. (author), Van der Meer, F.P. (author), Sluys, L.J. (author)
This paper presents a new damage model for simulating fatigue-driven delamination in composite laminates. This model is developed based on the Thick Level Set approach (TLS) and provides a favorable link between damage mechanics and fracture mechanics through the non-local evaluation of the energy release rate. Previously, this approach has been...
conference paper 2015
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Li, K. (author), Stroeven, P. (author), Stroeven, M. (author), Sluys, L.J. (author)
Permeability of virtual cement seems to exceed experimental data by several orders of magnitude. The differences may actually not be that dramatic, since experimental samples are in practice not always fully saturated as generally assumed. This paper demonstrates that this has enormous effects on permeability. A numerical study is conducted on...
conference paper 2015
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Le, N.L.B. (author), Stroeven, P. (author), Stroeven, M. (author), Sluys, L.J. (author)
Details of a complete methodology for porosimetry of virtual concrete have been described in a series of publications. This paper shortly sketches the main characteristics, whereupon it is indicated how a pore network model is designed based on data extracted from the virtual cement paste. This involves smoothing the main trunks as the main pore...
conference paper 2015
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Lahuerta, F. (author), Nijssen, R.P.L. (author), Van der Meer, F.P. (author), Sluys, L.J. (author)
Thick laminates are increasingly present in large composites structures such as wind turbine blades. Different factors are suspected to be involved in the decreased static and dynamic performance of thick laminates. These include the effect of self-heating, the scaling effect, and the manufacturing process influence. The aim of this work is to...
conference paper 2015
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Magalhaes Pereira, L.F. (author), Weerheijm, J. (author), Sluys, L.J. (author)
The development of realistic numerical tools to efficiently model the response of concrete structures subjected to close-in detonations and high velocity impacts has been one of the major quests in defense research. Under these loading conditions, quasi-brittle materials undergo a multitude of failure (damage) mechanisms. Dynamic tensile failure...
conference paper 2015
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Lloberas-Valls, O. (author), Everdij, F.P.X. (author), Rixen, D.J. (author), Simone, A. (author), Sluys, L.J. (author)
In this contribution, dual and primal domain decomposition techniques are studied for the multiscale analysis of failure in quasi-brittle materials. The multiscale strategy essentially consists in decomposing the structure into a number of nonoverlapping domains and considering a refined spatial resolution where needed. In multiscale analysis of...
conference paper 2014
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Musivand Arzanfudi, M. (author), Al-Khoury, R.I.N. (author), Sluys, L.J. (author)
conference paper 2014
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Lahuerta Calahorra, F. (author), Westphal, T. (author), Nijssen, R.P.L. (author), Van der Meer, F.P. (author), Sluys, L.J. (author)
conference paper 2014
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Ahmed, A. (author), Sluys, L.J. (author)
conference paper 2014
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Sluys, L.J. (author), Van der Meer, F.P. (author)
On the microlevel, cusps are formed during delamination crack growth under mode II loading conditions. In this work, two different approaches to simulate this process are presented. Firstly a cohesive zone method where cohesive segments are introduced between a pair of neighbouring elements when the traction between those elements exceeds the...
conference paper 2014
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Lahuerta, F (author), Westphal, T. (author), Nijssen, RPL (author), van der Meer, F.P. (author), Sluys, L.J. (author)
The aim of this work is to study the thickness effect in static and fatigue tests of glass-fibre unidirectional compression coupons. For this purpose, the self-heating effect, the effect of specimen geometry, and the influence of the manufacturing processes have been minimized. A scaled thickness compression coupon has been designed with the...
conference paper 2014
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Ahmed, A. (author), Sluys, L.J. (author)
Experimental testing and numerical analysis often travel in tandem in a design process. Recent advances in novel numerical techniques to simulate mesh objective crack propagation offer a great potential for accurate and efficient damage analysis of composite laminates. This paper presents a numerical study on computational modeling of mesh...
journal article 2013
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Magalhaes Pereira, L.F. (author), Weerheijm, J. (author), Sluys, L.J. (author)
Security-sensitive structures, such as military facilities, government buildings, strategic industrial infrastructures, bridges, dams, etc. should be designed to withstand explosions and high velocity impacts, both from terrorist attacks and other acts of war. Since concrete is the most widely used construction material understanding concrete...
lecture notes 2013
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Li, K. (author), Stroeven, M. (author), Stroeven, P. (author), Sluys, L.J. (author)
conference paper 2013
Searched for: author:"Sluys, L.J."
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