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Micromechanical model for off-axis creep rupture in unidirectional composites undergoing finite strains

Kovacevic, D. (author), Sundararajan, Bharath K. (author), van der Meer, F.P. (author)

A microscale numerical framework for modeling creep rupture in unidirectional composites under off-axis loading is presented, building on recent work on imposing off-axis loading on a representative volume element. Creep deformation of the thermoplastic polymer matrix is accounted for by means of the Eindhoven Glassy Polymer material model....

journal article 2023

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A numerical framework for simulating progressive failure in composite laminates under high-cycle fatigue loading

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

In this work, a recently proposed high-cycle fatigue cohesive zone model, which covers crack initiation and propagation with limited input parameters, is embedded in a robust and efficient numerical framework for simulating progressive failure in composite laminates under fatigue loading. The fatigue cohesive zone model is enhanced with an...

journal article 2023

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Machine learning of evolving physics-based material models for multiscale solid mechanics

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

In this work we present a hybrid physics-based and data-driven learning approach to construct surrogate models for concurrent multiscale simulations of complex material behavior. We start from robust but inflexible physics-based constitutive models and increase their expressivity by allowing a subset of their material parameters to change in...

journal article 2023

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Characterization of mode-II delamination fracture energy via computational homogenization

Ke, L. (author), van der Meer, F.P. (author)

Due to the complex underlying microscopic damage processes, the failure behavior of composite materials is challenging to understand and predict. Fracture mechanics approaches [1] and cohesive zone models [2] that simulate delamination generally consider the fracture energy as a material characteristic that exclusively depends on the fracture...

conference paper 2022

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Circular representative volume elements for strain localization problems

Hofman, P. (author), Ke, L. (author), van der Meer, F.P. (author)

A common choice for multiscale modeling of the mechanical response of composites is to use periodic boundary conditions (PBCs) on square and cubical representative volume elements (RVEs). However, when strain localization occurs in the micromodel, these PBCs are unable to reproduce the transverse isotropy of composite materials with a random...

journal article 2022

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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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Microbial community assembly and metabolic function in top layers of slow sand filters for drinking water production

Chen, L. (author), Zhai, Y. (author), van der Mark, Ed (author), Liu, G. (author), van der Meer, Walter (author), Medema, G.J. (author)

Slow sand filters (SSFs) are widely applied to treat potable water; the removal of contaminants (e.g., particles, organic matter, and microorganism) occurs primarily in the top layer. However, the development of the microbial community and its metabolic function is still poorly understood. In the present study, we analyzed the microbial...

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

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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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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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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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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