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Accurate simulation of delamination under mixed-mode loading using a multilinear cohesive law

Abdel-Monsef, S. (author), Tijs, B.H.A.H. (author), Renart, J. (author), Turon, A. (author)

The complex failure mechanisms involved in failure of interfaces requires the use of an accurate description of the cohesive law. In recent years, there have been many developments to determine the full shape of the cohesive law. However, most of the existing cohesive zone models assume a simplified shape, such as bilinear, trapezoidal or...

journal article 2023

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Constructing a Mesh Model of the Construction for Finite Element Method (FEM) Simulation from the Point Cloud Data Collected by Terrestrial Laser Scanning (TLS)

Nguyen, Anh Rin (author), Huynh, Ngoc Thi (author), Truong-Hong, Linh (author), Phan, Anh Thu Thi (author)

In recent years, there has been a significant increase in inspecting and evaluating transport infrastructure. Traditionally, these structural data were collected manually by measuring and redrawing the construction against design documents. In recent decades, laser scanning technology can help collect 3D data rapidly and accurately. The 3D...

conference paper 2023

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Towards safe shearography inspection of thick composites with controlled surface temperature heating

Tao, N. (author), Anisimov, A. (author), Groves, R.M. (author)

Thick glass fiber-reinforced polymer (GFRP) composites, e.g. thickness of more than 50 mm, are increasingly used in a wide variety of industries, particularly in the marine and wind energy sectors. Defect detection and characterisation in these composites remain appealing challenges due to the material complexity and the presence of various...

journal article 2023

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Estimation of spudcan penetration in variable sand deposits with the Arbitrary Lagrangian Eulerian Finite Element Method

Tolooiyan, Ali (author), Gavin, Kenneth (author), Dyson, Ashley P. (author)

Offshore jack-up rigs are most commonly founded on large-diameter conical “spudcan” foundations, which are frequently designed using traditional analytical methods for shallow footings. This paper presents the design of a spudcan installed off the coast of Tunisia. The maximum penetration depth of the footing under the available preload is...

journal article 2023

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FEM modelling to predict spatiotemporally resolved water uptake in organic coatings: Experimental validation by odd random phase electrochemical impedance spectroscopy measurements

Meeusen, M. (author), van Dam, J.P.B. (author), Madelat, N. (author), Jalilian, E. (author), Wouters, B. (author), Hauffman, T. (author), Van Assche, G. (author), Mol, J.M.C. (author), Hubin, A. (author), Terryn, H.A. (author)

In this work, a new finite element modelling (FEM) approach is followed to model spatiotemporally resolved water uptake in organic coatings. To this aim, we start from a physical model, where not only Fickian diffusion of water is taken into account but also the adsorption/desorption reaction of water on the polymer matrix. Starting from a...

journal article 2023

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Bending study of submarine power cables based on a repeated unit cell model

Fang, P. (author), Li, Xiao (author), Jiang, X. (author), Hopman, J.J. (author), Bai, Yong (author)

Predicting the bending behaviours of a submarine power cable (SPC) is always a tough task due to its complex geometry and inner layer contact, not to mention the stick–slip mechanism. A full-scale finite element model is cumbersome during the early design stage and a more efficient model for practical use is required. Therefore, in this paper...

journal article 2023

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Mechanical analysis of a type of wire rope subjected to tension

Ma, Yuanxing (author), Shi, Baobin (author), Ali, Liaqat (author), Bai, Yong (author), Fang, P. (author)

Wire ropes are widely observed in many industries such as marine engineering and civil engineering, as a type of structure that can bear huge axial force. There are various kinds of wire ropes in practical engineering, corresponding to different usage scenarios. This paper focuses on 6 × 36SW + 1WR with a diameter of 16 mm. The axial...

journal article 2023

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Improving Acoustic Measurements with Cavities in Closed Test Section Wind Tunnels

VanDercreek, Colin (author)

<br/>Aerodynamic noise produced by aircraft, wind turbines, and other objects subjected to airflow contribute to environmental noise pollution, which adversely affects human and animal health. Consequently, governments impose restrictions on aircraft and wind turbine noise levels. These restrictions can have an economic impact by limiting...

doctoral thesis 2022

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Shearography non-destructive testing of thick GFRP laminates: Numerical and experimental study on defect detection with thermal loading

Tao, N. (author), Anisimov, A. (author), Groves, R.M. (author)

Thick composite materials are commonly used as load-bearing structures in marine applications. Developing a suitable and sophisticated non-destructive testing (NDT) method for thick composites is an urgent challenge to improve the safety, reliability and maintenance of these structures. Digital shearography has become an important NDT...

journal article 2022

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Fragility curves for light damage of clay masonry walls subjected to seismic vibrations

Korswagen, Paul A. (author), Longo, M. (author), Rots, J.G. (author)

The probability of light damage to unprepared, unreinforced masonry structures exposed to induced seismicity due to gas extraction in the north of the Netherlands is still under investigation. Repeated light seismic excitations caused by frequent, light and nearby earthquakes have been linked to economical losses and societal unrest in...

journal article 2022

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Developing Equations for Free Vibration Parameters of Bistable Composite Plates Using Multi-Objective Genetic Programming

Saberi, Saeid (author), Sadat Hosseini, Alireza (author), Yazdanifar, Fatemeh (author), Castro, Saullo G.P. (author)

For the last three decades, bistable composite laminates have gained publicity because of their outstanding features, including having two stable shapes and the ability to change these states. A common challenge regarding the analysis of these structures is the high computational cost of existing analytical methods to estimate their natural...

journal article 2022

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FEM-assisted shearography with spatially modulated heating for non-destructive testing of thick composites with deep defects

Tao, N. (author), Anisimov, A. (author), Groves, R.M. (author)

This study aims at improving shearography non-destructive testing (NDT) of deep defects in thick composites with thermal loading. Instead of conventional global heating (GH), the core idea is to apply novel spatially modulated heating (SMH) for shearography NDT. In this paper, the finite element method (FEM) has been used to advance...

journal article 2022

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Sandwich structures with repairable cores based on truncated cube cells

Hedayati, R. (author), Yousefi, Armin (author), Bodaghi, Mahdi (author)

With dramatic increase in 3D printing applications in industry, sandwich panels with 3D printed cores have gained a lot of attention recently. In harmony with global movement towards sustainability and low-carbon emission industries, sandwich panels with easy-to-repair and cost-effective cores would be very attractive structures. In this...

journal article 2022

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Analysis of SN-BI solders: X-ray micro computed tomography imaging and microstructure characterization in relation to properties and liquid phase healing potential

Siroky, Georg (author), Kraker, Elke (author), Rosc, Jördis (author), Kieslinger, Dietmar (author), Brunner, Roland (author), van der Zwaag, S. (author), Kozeschnik, Ernst (author), Ecker, Werner (author)

This work provides an analysis of X-ray micro computed tomography data of Sn-xBi solders with x = 20, 30, 35, 47, 58 wt.% Bi. The eutectic thickness, fraction of eutectic and primary phase are analyzed. Furthermore, the 3D data is evaluated by means of morphology parameters, such as, shape complexity, flatness, elongation and mean intercept...

journal article 2021

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Crownwall Failure Analysis through Finite Element Method

Dermentzoglou, Dimitrios (author), Castellino, Myrta (author), De Girolamo, Paolo (author), Partovi, Maziar (author), Schreppers, Gerd-Jan (author), Antonini, A. (author)

Several failures of recurved concrete crownwalls have been observed in recent years. This work aims to get a better insight within the processes underlying the loading phase of these structures due to non-breaking wave impulsive loading conditions and to identify the dominant failure modes. The investigation is carried out through an offline one...

journal article 2021

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Pollution and accuracy of solutions of the Helmholtz equation: A novel perspective from the eigenvalues

Dwarka, V.N.S.R. (author), Vuik, Cornelis (author)

In researching the Helmholtz equation, the focus has either been on the accuracy of the numerical solution (pollution) or the acceleration of the convergence of a preconditioned Krylov-based solver (scalability). While it is widely recognized that the convergence properties can be investigated by studying the eigenvalues, information from the...

journal article 2021

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A simultaneous dual-parameter optical fibre single sensor embedded in a glass fibre/epoxy composite

Fazzi, L. (author), Valvano, S. (author), Alaimo, Andrea (author), Groves, R.M. (author)

A simultaneous two-parameter single sensor based on weakly tilted Fibre Bragg Grating (TFBG), embedded in a 1 mm glass fibre/epoxy composite plate, is demonstrated to measure independently the temperature and strain variations induced in the material by the exposure to heating lamps. The spectrum of weakly TFBGs is composed of several peaks...

journal article 2021

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Integrated method for virtual strength prediction of timber

Khaloian, Ani (author), van de Kuilen, J.W.G. (author)

Before timber boards can be used for engineering applications, they need to be strength graded. This step is currently done based on visual or machine grading methods. Each approach may face problems such as frequent measurement (human) errors or problems in dynamic measurements due to missing density values, respectively. To increase...

conference paper 2021

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High-resolution monitoring of the initial development of cracks in experimental masonry shear walls and their reproduction in finite element models

Korswagen, Paul A. (author), Longo, M. (author), Rots, J.G. (author)

Induced seismicity in the north of the Netherlands has recently exposed unprepared, unreinforced masonry structures to considerable earthquake hazard. While the ultimate-limit state capacity of the structures is vital to assess the individual's risk, their behaviour during more frequent, lighter earthquakes leading to ‘light damage’, has...

journal article 2020

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Residual stresses in thermite welded rails: significance of additional forging

Josefson, B. Lennart (author), Bisschop, R. (author), Messaadi, M. (author), Hantusch, J. (author)

The aluminothermic welding (ATW) process is the most commonly used welding process for welding rails (track) in the field. The large amount of weld metal added in the ATW process may result in a wide uneven surface zone on the rail head, which may, in rare cases, lead to irregularities in wear and plastic deformation due to high dynamic wheel...

journal article 2020