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Item type:Publication, Access status: with files , Damage modelling of porous PBF-LB/M 316L stainless steel using crystal plasticity and cohesive zone method with RVE model(Elsevier, 2026-10-10); ; ; This study aimed to develop and validate a microstructurally informed damage model that explicitly incorporates grains, melt pools, pores, and pre-existing cracks to quantify how defect morphology, porosity level, and orientation govern deformation and failure of products manufactured using laser-based powder bed fusion of metals (PBF‑LB/M). A representative volume element (RVE) framework, inspired by the experimental observations, was constructed using Voronoi tessellation for grain topology and melt pools modelled as overlapping cylinders. Cohesive elements inserted at melt-pool boundaries to represent weak interfaces. Appropriate RVE size identified via convergence analysis. Pore volume distributions were fitted with lognormal and Weibull functions, with Kolmogorov–Smirnov statistics indicating superior lognormal fit. Parameterizable pore geometries were generated by an algorithm to create porous RVEs. The crystal plasticity and cohesive zone model parameters were calibrated to experimental stress–strain data, achieving close agreement. Simulations demonstrated that stress concentration and plastification initiate near pores, while damage preferentially nucleates and evolves at melt pool boundaries adjacent to pores, identifying pores and melt-pool boundaries as the most vulnerable zones. Orientation strongly affected properties: horizontally oriented RVEs exhibited higher yield and ultimate tensile strengths but lower elongation than build-direction RVEs. Increasing pores and previously defined cracks markedly reduced ductility and ultimate stress.Publicationtype: Review Article6 1 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: with files , Coupled boundary element method for modelling wave-ship hydrodynamics - recent developments and results(American Society of Mechanical Engineers (ASME), 2026-09-28); ; ; ; The provision of fast and accurate estimation of ship motions and resistance in waves represents the main criterion for the continued use of Boundary Element Methods in the maritime industry and research. In addition, it makes them well suited for maritime tools such as decision support and energy management systems. Therein, real-time evaluations of wave loads and power demands are often required, which makes the use of Boundary Element Methods in these tools advantageous compared to viscous CFD solvers. In this paper, we present strategies and results of a hydrodynamic coupled Boundary Element Method prototype designed for applications where accurate real-time predictions are crucial. The wave-ship interaction is modeled as a mixed boundary value problem in which the intersection of water and ship surface is treated explicitly, and spectral-like approaches are considered for fast simulation of wave dynamics. Moreover, the coupled approach ensures the simultaneous evaluation of wave and ship dynamics. The paper highlights the extension of the approach to boundary intersections on elements, presents results obtained for a set of test cases and outlines future development steps.Publicationtype: Conference Paper8 2 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: with files , Current milestone and emerging trend of carbon capture and storage (CCS) technology: bibliometric analysis and review of risk-hazard, economic, and numerical assessments(Cerebration Science Publishing, 2026-09-03); ; ; ; Background: Carbon Capture and Storage (CCS) is emerging as a potential solution to reduce CO<inf>2</inf> emissions. This technology captures CO<inf>2</inf> for reuse or stores it safely underground, preventing pollution of the atmosphere. CCS is the best technology to control climate change and global warming. Purpose: This review aims to map the achievements that have been made and future research trends. Methods: This bibliometric review analyzes CCS-related research from 2010 to 2024 using the Scopus database. VOSviewer and Bibliometrix software are used for data processing and visualization. Findings: Significant advances have been made in CCS technology research. The growth of the number of publications, collaboration networks, the most influential contributors, and research trends has been mapped, which can be used as a reference for future research. Conclusions: The methodology used can still be refined to eliminate the potential bias in data interpretation. However, certain conclusions can be drawn from this bibliometric analysis. The research trend began to shift toward efforts to utilize CO<inf>2</inf> in useful products, improve safety, and reduce implementation costs. Originality: This bibliometric review provides an in-depth examination of the scientific literature on CCS, with a particular emphasis on risk assessment, economic perspectives, and numerical modeling. In contrast to previous bibliometric research, it stands out by integrating these three central themes while also highlighting the limitations and gaps in existing knowledge.Publicationtype: Journal Article24 15 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: with files , Influence of artificial seawater corrosion on the fatigue strength of 40 mm thick welded details for offshore wind support structures(American Society of Mechanical Engineers (ASME), 2026-06); ; ; Offshore wind support structures are exposed to cyclic loading and harsh environmental conditions that can promote corrosion and potentially affect fatigue performance. This study investigates the influence of long-term artificial seawater corrosion on the fatigue strength of thick welded steel details representative of offshore applications. Butt-welded and fillet-welded joints with plate thickness of 40 mm were exposed to artificial seawater for 12 months and subsequently tested under four-point bending fatigue loading. Changes in weld geometry induced by corrosion were quantified using optical 3D surface scans. The results show that artificial seawater does not reduce the characteristic fatigue strength of the investigated joints. While butt welds exhibit comparable fatigue performance before and after corrosion, fillet welds show an increase in fatigue strength due to corrosion-induced smoothing of the weld toe geometry. These findings indicate that corrosion-induced surface modifications should be considered in fatigue assessment and lifetime extension strategies for offshore wind support structures.Publicationtype: Conference Paper18 7 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: with files , Experimental evaluation of data-driven deterministic wave generation(American Society of Mechanical Engineers (ASME), 2026-06); ; ; ; This paper explores the applicability of data-driven deterministic wave generation in an experimental environment. Various datasets that comprise different combinations of experimental- and synthetic data are used to train a fully convolutional neural network on the task of predicting the wave-maker control signal associated to a desired target wave sequence at a predefined target location in the wave tank. The trained models are evaluated in an experimental program, where the predicted control signals are executed in a wave tank, the actual wave is measured and compared against the predefined target wave. The standard wave modeling approach for the generation of tailored wave sequences, which is based on linear theory, is conducted for reference. The test dataset contains 950 irregular sea states with a wide range of characteristic sea state parameters, as well as seven tailored extreme waves, including the well-known “Draupner Wave”. It is shown that the data-driven approach consistently outperforms the standard method in accuracy across the studied range of sea states, emphasizing its effectiveness as a flexible and precise alternative for wave basin experiments.Publicationtype: Conference Paper30 7 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: with files , Committee V.2: experimental methods(Springer, 2026-04-05); ; 8 4 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: with files , A comparison of the toxicity and asphyxiation risk during bunkering of LH2, LNG and NH3 by means of a quantitative risk assessmentTo achieve the greenhouse gas (GHG) reduction goals set by the International Maritime Organization (IMO), hydrogen, natural gas and ammonia are considered as marine fuel in their liquefied form. Nevertheless, concerns regarding their safety have been raised. Thus, the overarching aim of this investigation is it to addresses these concerns by conducting a comparative analysis of the safety of bunkering these fuels, with a particular focus on toxicity and asphyxiation hazards. A quantitative risk assessment is thus conducted in two steps: first, to identify the probability through a frequency analysis and second, to identify the severity through a consequence analysis. The present study will utilize the requisite safety distance as the threshold for the severity. The calculation of the safety distance necessary for the different fuels is performed utilizing a Gaussian dispersion model. Subsequently, both the necessary safety distance and the frequency of harmful events of all three fuels are then compared. The findings indicate that the frequencies of the toxicity/asphyxiation case are of comparable order magnitude for all fuels. However, the safety distance of ammonia is one order of magnitude larger than that of the other fuels.Publicationtype: Journal Article11 8 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: with files , Ultimate bending capacity of wind turbine tower structures: a new empirical formulation based on the geometric and material factors(Cerebration Science Publishing, 2026-03-16); ; ; ; Wind energy is emerging as the most promising sustainable energy source due to its abundant resources and environmental benefits. One of the most essential parts of a wind turbine system is the tower, as it is responsible for supporting the weight of the tower top and the loads given by its environment. The preliminary design of the tower section of the wind turbine system is crucial to ensure the system's safety, and a simplified formula is needed to make it more practical. A comprehensive series of ultimate strength analyses on tapered pipes was performed to optimize the tower design, involving the variation and cross-combination of numerous geometric and material parameters. A total of 900 tapered pipe configurations were assessed using finite element method (FEM) analysis via the ABAQUS/CAE program. In the case of tapered cylindrical shells length variations, there was an increase in bending moment from the plastic deformation phase to the critical phase of 29%, 31%, and 39% for pipes measuring 50 m, 30 m, and 10 m, respectively, with the highest ultimate moment of 278.7 kN•m achieved at a pipe length of 50 m. The ultimate bending moment values were then formulated through regression analysis, resulting in a derived formula to predict the ultimate bending capacity of tapered pipes for wind turbine structures. The findings revealed that varying multiple parameters significantly impacted the ultimate strength and critical failure modes of the tapered pipe. The newly developed formula showed good accuracy, providing a reliable tool for design predictions.Publicationtype: Journal Article16 10 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: with files , Buckling behavior of thin-walled cylindrical shell structure under axial compression: A study of imperfection parameters with FE approach(Springer, 2026-03); ; Cylindrical shell structures are widely used in engineering applications, particularly in ships and aircraft, due to their high strength-to-weight ratio and efficiency in resisting compressive loads. However, these structures are susceptible to failure through buckling, especially when imperfections such as load eccentricity, thickness variation, and initial geometric deviations are present. This study examines the structural response of thin-walled cylindrical shells subjected to axial compression, taking into account various imperfections. A finite element (FE) approach using ABAQUS software was employed and validated against previous experimental data. A parametric study was conducted using varying load eccentricity, initial geometric imperfections, and longitudinal thickness. The results show that load eccentricity significantly reduces the ultimate load and shifts the location of deformation. Both geometric and thickness imperfections also affect structural strength and the location of buckling. These findings enhance the reliability and safety of cylindrical shell designs in engineering applications.Publicationtype: Journal Article29 24 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: with files , Assessment of risk, safety, hazard, and economic challenges of CCS pipeline and wellbore implementation: exploring emerging achievements in 2010–2025(Elsevier, 2026-02-12); ; ; ; Carbon capture and storage (CCS) is widely regarded as a strategic mitigation option for reducing CO₂ emissions from fossil fuel–based industries and the energy sector, in line with global efforts to limit the rise in average temperature to below 1.5 °C. Despite its potential to deliver substantial carbon reductions, CCS deployment remains challenged by a range of technical, economic, and operational risks that must be systematically addressed. These risks arise across nearly all stages of the CCS value chain, including CO₂ capture, transportation, and storage. Over the past decade, research on CCS has expanded rapidly, and several review studies have attempted to map emerging research trends in this field. However, existing reviews have generally concentrated on individual components of CCS technologies, such as carbon capture processes or the safety of geological storage. These studies have not adequately examined the interdependencies across the entire system. In contrast, the present study provides a more comprehensive perspective by assessing the whole CCS chain, thereby offering a systemic understanding of its performance and implementation challenges. The novelty of this work lies in its integrative approach, combining risk and safety analysis, hazard identification, and economic evaluation, with particular emphasis on the transportation and storage stages. In addition, recent advances involving modern technologies aimed at enhancing CCS safety and sustainability are discussed to highlight potential directions for future research.Publicationtype: Review Article22 19