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Wils, K.A. (author), Chen, B. Y. (author)With the advent of novel quantum computing technologies and the new possibilities thereby offered, a prime opportunity has presented itself to investigate the practical application of quantum computing. This work investigates the feasibility of using quantum annealing for structural optimization. The target problem is the discrete truss sizing...journal article 2023
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Trabal, Guillem Gall (author), Bak, Brian Lau Verndal (author), Chen, B. Y. (author), Jensen, Simon Mosbjerg (author), Lindgaard, Esben (author)A numerical study on the feasibility of using patches of interface weakening or toughening material to trigger multiple delaminations toughening laminated composite structures against delamination is presented. The studies use an adaptive refinement formulation that uses cohesive elements to model delamination initiation and propagation. A DCB...conference paper 2022
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Trabal, Guillem Gall (author), Bak, Brian Lau Verndal (author), Chen, B. Y. (author), Lindgaard, Esben (author)A novel and efficient numerical formulation for the modelling of multiple delaminations growth in laminated composite materials subjected to quasi-static loading is presented. The proposed formulation alleviates the high computational cost associated with models featuring cohesive elements by using a novel Adaptive Refinement Scheme and an...journal article 2022
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Tosti Balducci, G.B.L. (author), Chen, B. Y. (author), Möller, M. (author), Gerritsma, M.I. (author), De Breuker, R. (author)Structural mechanics is commonly modeled by (systems of) partial differential equations (PDEs). Except for very simple cases where analytical solutions exist, the use of numerical methods is required to find approximate solutions. However, for many problems of practical interest, the computational cost of classical numerical solvers running on...review 2022
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Russo, R. (author), Chen, B. Y. (author)The authors would like to point out three writing mistakes that have been found after the publication of the original paper: Equation (13) should be written as: 1 (Formula presented.) to correctly represent the intended column vector of the element's degrees of freedom. Equation (49) and (50) should be written as: 2 (Formula presented.) to...journal article 2022
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Jonkheijm, L. (author), Chen, B. Y. (author), Schuurman, M.J. (author)With the rising number of Unmanned Aerial Systems (UAS) flying in the sky, an increase in collisions with manned aircraft seems inevitable. Since these devices are permitted to operate in airspace which they share with rotorcraft, a helicopter is certainly not retained from the risk of colliding with a UAS. The only prevailing impact related...conference paper 2022
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Singh, Umed (author), Kumar, Sachin (author), Chen, B. Y. (author)In this work, Floating Node Method (FNM), first developed for fracture modelling of laminate composites, is coupled with cell-wise strain Smoothed Finite Element Method (SFEM) for modelling 2D linear elastic fracture mechanics problems. The proposed method is termed as Smoothed Floating Node Method (SFNM). In this framework, FNM is used to...journal article 2022
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Trabal, Guillem Gall (author), Bak, Brian Lau Verndal (author), Chen, B. Y. (author), Carreras, Laura (author), Lindgaard, Esben (author)A novel efficient numerical formulation for the analysis of multiple fatigue-driven delamination cracks is presented. A cohesive zone model is used in combination with an Adaptive Refinement Scheme (ARS) and an Adaptive Floating Node Method (A-FNM) element that refine the model effectively during the analysis. Novel techniques are proposed to...journal article 2022
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Trabal, Guillem Gall (author), Bak, Brian Lau Verndal (author), Chen, B. Y. (author), Jensen, Simon Mosbjerg (author), Lindgaard, Esben (author)A numerical study on toughening laminated composite materials against delamination by initiating multiple interlaminar cracks is presented. Different configurations of interface toughening and weakening patches, that modify the interface properties at selected locations, are investigated as a way to trigger multiple delaminations. Both...journal article 2022
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Kocaman, E. S. (author), Chen, B. Y. (author), Pinho, S. T. (author)Design and optimisation of large structures, including the positioning of lower-level components, typically require extensive user involvement and sequential mechanical analysis/optimisation iterations. This paper presents an original method that enables adaptive positioning of lower-level models (such as components) within higher level...journal article 2020
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Panzo, Antonín (author), Chen, B. Y. (author)In practical applications, the use of computational modeling has been industry-wide adopted to speed up product development as well as reduce physical testing costs. Such models of complex or large systems are, however, often computationally expensive, hence solution times of hours or more are not uncommon. Additionally, as these models are...journal article 2020
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Fu, Qiang (author), Yi, Sinan (author), Chen, B. Y. (author), Bui, Tinh Quoc (author), Hu, Xiaofei (author), Yao, Weian (author)Numerical study on crack propagation are of great importance for structure design and assessment. In this contribution, the floating node method (FNM) is combined with the symplectic analytical singular element (SASE) to form a new crack-tip element. The four node quadrilateral crack-tip element contains a SASE for the crack tip area to...journal article 2020
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Lu, X. (author), Chen, B. Y. (author), Tan, V. B.C. (author), Tay, T. E. (author)The interaction between matrix cracks and interface delamination is a major failure mechanism in composite laminates and has been a subject of active research in recent years. Although coupled failure behaviour of composite laminates between matrix cracks and delamination has been observed in experiments, accurate modelling of this phenomenon...conference paper 2020
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Russo, R. (author), Chen, B. Y. (author)Cohesive Element (CE) is a well-established finite element for fracture, widely used for the modelling of delamination in composites. However, the computational time of CE-based method is prohibitive. This is because the steep and non-smooth stress gradient in the cohesive zone requires a very fine mesh. In this context, a new type of CE is...conference paper 2020
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Zhi, J. (author), Chen, B. Y. (author), Tay, T. E. (author)Tremendous efforts have been put into the study of structural integrity and the understanding of failure mechanisms in composites. Geometric non-linearity, receiving few attention in coupon-level simulations, can play an important role in the design and analysis of larger structures. This paper aims at extending the recently-developed...conference paper 2020
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Russo, R. (author), Chen, B. Y. (author)Cohesive element (CE) is a well-established finite element for fracture, widely used for the modeling of delamination in composites. However, an extremely fine mesh is usually needed to resolve the cohesive zone, making CE-based delamination analysis computationally prohibitive for applications beyond the scale of lab coupons. In this work, a...journal article 2020
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Lu, X. (author), Ridha, M. (author), Chen, B. Y. (author), Tan, V. B.C. (author), Tay, T. E. (author)The cohesive element (CE) has been widely used to model delamination in laminated composites. The penalty stiffness, interfacial strength and fracture toughness are three CE parameters that often determine the accuracy of the numerical analysis by finite elements (FEs). The fracture toughness may be experimentally determined through standard...journal article 2019
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Kocaman, E.S. (author), Chen, B. Y. (author), Pinho, S. T. (author)This paper presents a new polymorphic element modelling approach for multi-scale simulation, with an application to fracture in composite structures. We propose the concept of polymorphic elements; these are elements that exist as an evolving superposition of various states, each representing the relevant physics with the required level of...journal article 2019
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Lu, X. (author), Chen, B. Y. (author), Tan, V. B.C. (author), Tay, T. E. (author)The cohesive element has been widely employed to model delamination and matrix cracking in composite materials. However, an extremely fine mesh along the potential crack path is required to achieve accurate predictions of stresses within the cohesive zone. A sufficient number of cohesive elements must be present within the cohesive zone ahead...journal article 2018
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Zhi, Jie (author), Chen, B. Y. (author), Tay, Tong Earn (author)In this paper, the recently-developed floating node method is extended for damage analysis of laminated composites with large deformations. Strong discontinuities including interfacial delamination and matrix cracks are explicitly represented by geometrically nonlinear kinematics. Interactions between these two kinds of failure patterns are...journal article 2018
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