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Experimental/numerical characterization of hygrothermal ageing in glass/epoxy composites

Rocha, I.B.C.M. (author), Raijmaekers, S (author), Nijssen, RPL (author), van der Meer, F.P. (author), Sluys, Lambertus J. (author)

In this work, a combined experimental/numerical approach is used to investigate the effect of water ingression in glass/epoxy composite specimens. Interlaminar shear (ILS) specimens were immersed at 50◦C for multiple durations and tested. Re-dried specimens were also tested. Significant strength degradation of up to 50% was found for wet...

conference paper 2016

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Experimental/numerical study of anisotropic water diusion in glass/epoxy composites

Rocha, I.B.C.M. (author), Raijmaekers, S (author), Nijssen, RPL (author), van der Meer, F.P. (author), Sluys, Lambertus J. (author)

In this work a glass/epoxy composite commonly used in wind turbine blades is exposed to a humid environment at an elevated temperature. To research the anisotropic di_usion behaviour observed in unidirectional composite specimens, experimental results of slices cut along the three directional planes of the laminate immersed in demineralised...

conference paper 2016

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Micromechanics-based validation of a mesomodel for matrix nonlinearity

van der Meer, F.P. (author)

The performance of a mesomechanical constitutive law for composites is assessed through comparison with micromechanical model results. In this paper, results are presented for non-monotonic strain histories obtained from mesomechanical simulation of a shear dominated delamination test.

conference paper 2016

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Micromechanical validation of a mesomodel for plasticity in composites

van der Meer, F.P. (author)

In this paper, the performance of a recent homogenized orthotropic plasticity model for fiber reinforced composites (Vogler et al. (2013)) is investigated by comparing the model response against a micromechanical model. It is assumed that the micromechanical model which contains a recent plasticity model for polymers (Melro et al. (2013a,b))...

journal article 2016

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Modelling for analysis of refraction effects on overtopping in a complex estuary

Oosterlo, P. (author), van der Meer, J.W. (author), Hofland, Bas (author), van Vledder, G.P. (author)

abstract 2018

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Probabilistic Assessment of Overtopping of Sea Dikes with Foreshores including Infragravity Waves and Morphological Changes: Westkapelle Case Study

Oosterlo, P. (author), McCall, R.T. (author), Vuik, V. (author), Hofland, Bas (author), van der Meer, J.W. (author), Jonkman, Sebastiaan N. (author)

Shallow foreshores in front of coastal dikes can reduce the probability of dike failure due to wave overtopping. A probabilistic model framework is presented, which is capable of including complex hydrodynamics like infragravity waves, and morphological changes of a sandy foreshore during severe storms in the calculations of the probability of...

journal article 2018

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Numerical simulation of foam flow in porous media

van der Meer, J.M. (author)

If secondary hydrocarbon recovery methods, like water flooding, fail because of the occurrence of viscous fingering one can turn to an enhanced oil recovery method (EOR) like the injection of foam. The generation of foam in a porousmedium can be described by a set of partial differential equations with strongly non-linear functions, which impose...

doctoral thesis 2018

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Cohesive zone and interfacial thick level set modeling of the dynamic double cantilever beam test of composite laminate

Liu, Y. (author), van der Meer, F.P. (author), Sluys, Lambertus J. (author)

The mode-I interlaminar fracture toughness of composite laminates under different loading rates can be measured by the double cantilever beam (DCB) test. It is observed from the DCB test of a unidirectional PEEK/carbon composite laminate that as the loading rate increases from quasi-static to dynamic range: (1) delamination crack growth...

journal article 2018

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Integral Failure Analysis of Pipelines in Flood Defenses

van der Meer, Anton (author), Schweckendiek, T. (author), Kruse, Henk (author), Schelfhout, Harry (author)

The presence of pipelines in flood defenses presents a challenge for assessing the probability of flooding. To prevent costly structural measures compensating for the possible negative effects of pipeline failure, we developed a framework for an integral failure analysis of pipeline and dike failure. The assessment framework is based on an event...

conference paper 2019

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Interpreting the single fiber fragmentation test with numerical simulations

van der Meer, F.P. (author), Raijmaekers, Sibrand (author), Rocha, I.B.C.M. (author)

Characterization of the mechanical properties of the fiber/matrix interface is a challenge that needs to be addressed to enable accurate micromechanical modeling of failure in composite materials. In this paper a numerical investigation is presented into one of the tests that has been proposed for measuring these interfacial properties. A new...

journal article 2019

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Accelerating crack growth simulations through adaptive model order reduction

Rocha, I.B.C.M. (author), van der Meer, F.P. (author), Taumaturgo Mororo, L.A. (author), Sluys, Lambertus J. (author)

Accurate numerical modeling of fracture in solids is a challenging undertaking that often involves the use of computationally demanding modeling frameworks. Model order reduction techniques can be used to alleviate the computational effort associated with these models. However, the traditional offline-online reduction approach is unsuitable...

journal article 2019

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A combined experimental/numerical investigation on hygrothermal aging of fiber-reinforced composites

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, Lambertus 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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A cohesive XFEM model for simulating fatigue crack growth under mixed-mode loading and overloading

Dekker, R. (author), van der Meer, F.P. (author), Maljaars, J. (author), Sluys, Lambertus 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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An adaptive domain-based POD/ECM hyper-reduced modeling framework without offline training

Rocha, I.B.C.M. (author), van der Meer, F.P. (author), Sluys, Lambertus J. (author)

This work presents a reduced-order modeling framework that precludes the need for offline training and adaptively adjusts its lower-order solution space as the analysis progresses. The analysis starts with a fully-solved step and elements are clustered based on their strain response. Elements with the highest strains are solved with a local...

journal article 2020

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Relative Magnitude of Infragravity Waves at Coastal Dikes with Shallow Foreshores: A Prediction Tool

Lashley, Christopher H. (author), Bricker, J.D. (author), van der Meer, J.W. (author), Altomare, Corrado (author), Suzuki, T. (author)

Despite the widely recognized role of infragravity (IG) waves in many often-hazardous nearshore processes, spectral wave models, which exclude IG-wave dynamics, are often used in the design and assessment of coastal dikes. Consequently, the safety of these structures in environments where IG waves dominate remains uncertain. Here, we combine...

journal article 2020

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Micromechanics-based surrogate models for the response of composites: A critical comparison between a classical mesoscale constitutive model, hyper-reduction and neural networks

Rocha, I.B.C.M. (author), Kerfriden, P. (author), van der Meer, F.P. (author)

Although being a popular approach for the modeling of laminated composites, mesoscale constitutive models often struggle to represent material response for arbitrary load cases. A better alternative in terms of accuracy is to use the FE² technique to upscale microscopic material behavior without loss of generality, but the...

journal article 2020

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Calibration and preparation of field measurements of oblique wave run-up and overtopping on dikes using laser scanners

Oosterlo, P. (author), Hofland, Bas (author), van der Meer, J.W. (author), Overduin, Maarten (author), Steendam, Gosse Jan (author)

Wave overtopping is typically measured in the field using overtopping tanks. In this paper, an alternative system is developed that uses two laser scanners. The system also measures wave run-up, as well as run-up depths and velocities, both during perpendicular and oblique waves on a dike in the field. The paper considers the first calibration...

journal article 2021

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A cohesive XFEM model for simulating fatigue crack growth under various load conditions

Dekker, R. (author), van der Meer, F.P. (author), Maljaars, J. (author), Sluys, Lambertus J. (author)

This study presents calibration and validation of a cohesive extended finite element model for fatigue crack propagation in ductile materials. The approach relies on a separation between plasticity around the crack tip and fatigue crack growth at the crack tip such that the influence of plasticity on fatigue driving forces is predicted. This...

journal article 2021

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On-the-fly construction of surrogate constitutive models for concurrent multiscale mechanical analysis through probabilistic machine learning

Rocha, I.B.C.M. (author), Kerfriden, P. (author), van der Meer, F.P. (author)

Concurrent multiscale finite element analysis (FE²) is a powerful approach for high-fidelity modeling of materials for which a suitable macroscopic constitutive model is not available. However, the extreme computational effort associated with computing a nested micromodel at every macroscopic integration point makes FE²...

journal article 2021

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Financial option valuation by unsupervised learning with artificial neural networks

Salvador, Beatriz (author), Oosterlee, C.W. (author), van der Meer, R. (author)

Artificial neural networks (ANNs) have recently also been applied to solve partial differential equations (PDEs). The classical problem of pricing European and American financial options, based on the corresponding PDE formulations, is studied here. Instead of using numerical techniques based on finite element or difference methods, we...

journal article 2021