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A simulation framework for predicting process-induced distortions for precise manufacturing of aerospace thermoset composites (2021)
Journal Article
Traiforos, N., Turner, T., Runeberg, P., Fernass, D., Chronopoulos, D., Glock, F., …Hartung, D. (2021). A simulation framework for predicting process-induced distortions for precise manufacturing of aerospace thermoset composites. Composite Structures, 275, 114465. https://doi.org/10.1016/j.compstruct.2021.114465

The choice of a suitable material model to simulate process induced distortions is important in order to achieve a right first time approach in the design of new moulds. This work investigates the ability of the Cure Hardening Instantaneously Linear... Read More about A simulation framework for predicting process-induced distortions for precise manufacturing of aerospace thermoset composites.

Multidisciplinary Optimisation of Aircraft Structures with Critical Non-Regular Areas: Current Practice and Challenges (2021)
Journal Article
Sferza, M., Ninić, J., Chronopoulos, D., Glock, F., & Daoud, F. (2021). Multidisciplinary Optimisation of Aircraft Structures with Critical Non-Regular Areas: Current Practice and Challenges. Aerospace, 8(8), 1-26. https://doi.org/10.3390/aerospace8080223

The design optimisation of aerostructures is largely based on Multidisciplinary Design Optimisation (MDO), which is a set of tools used by the aircraft industry to size primary structures: wings, large portions of the fuselage or even an entire aircr... Read More about Multidisciplinary Optimisation of Aircraft Structures with Critical Non-Regular Areas: Current Practice and Challenges.

Metamaterials for simultaneous acoustic and elastic bandgaps (2021)
Journal Article
Elmadih, W., Chronopoulos, D., & Zhu, J. (2021). Metamaterials for simultaneous acoustic and elastic bandgaps. Scientific Reports, 11(1), Article 14635. https://doi.org/10.1038/s41598-021-94053-3

In this work, we present a single low-profile metamaterial that provides bandgaps of acoustic and elastic waves at the same time. This was done by ensuring impedance mismatch in two different domains, the fluid domain where the acoustic waves propaga... Read More about Metamaterials for simultaneous acoustic and elastic bandgaps.

Optimal design of non-periodic metastructures (2021)
Presentation / Conference
Meng, H., & Chronopoulos, D. (2021, May). Optimal design of non-periodic metastructures. Paper presented at ICAMME 2021: 15. International Conference on Aerospace, Mechatronics and Mechanical Engineering, London, UK

Nonperiodic metamaterials can have better vibration attenuation than periodic metamaterials with properly designed resonator distributions. In this study, we propose optimal design routes for rainbow metamaterials. The rainbow metamaterials are nonpe... Read More about Optimal design of non-periodic metastructures.

Mixed Integer Linear Programming formulations of the stacking sequence and blending optimisation of composite structures (2021)
Journal Article
Ntourmas, G., Glock, F., Daoud, F., Schuhmacher, G., Chronopoulos, D., & Özcan, E. (2021). Mixed Integer Linear Programming formulations of the stacking sequence and blending optimisation of composite structures. Composite Structures, 264, 113660. https://doi.org/10.1016/j.compstruct.2021.113660

This manuscript proposes two novel formulations for the manufacturable stacking sequence retrieval of laminated composite structures. Detailed sizing of composite structures is commonly tackled by a two-stage optimisation approach, the first stage be... Read More about Mixed Integer Linear Programming formulations of the stacking sequence and blending optimisation of composite structures.

Transmission and reflection of waves at structural junctions connecting thin orthotropic plates (2021)
Journal Article
Aimakov, N., Tanner, G., & Chronopoulos, D. (2021). Transmission and reflection of waves at structural junctions connecting thin orthotropic plates. Wave Motion, 102, Article 102716. https://doi.org/10.1016/j.wavemoti.2021.102716

We present a semi-analytical method for computing the reflection and transmission coefficients at joints connecting an arbitrary number of semi-infinite orthotropic plates based on the line-junction approximation. We use a wave approach and describe... Read More about Transmission and reflection of waves at structural junctions connecting thin orthotropic plates.

A simple equivalent plate model for dynamic bending stiffness of three-layer sandwich panels with shearing core (2021)
Journal Article
Arasan, U., Marchetti, F., Chevillotte, F., Jaouen, L., Chronopoulos, D., & Gourdon, E. (2021). A simple equivalent plate model for dynamic bending stiffness of three-layer sandwich panels with shearing core. Journal of Sound and Vibration, 500, Article 116025. https://doi.org/10.1016/j.jsv.2021.116025

Equivalent or condensed plate models are being used in various industries to reduce the computation time in finite element modelling. Out of the available equivalent plate models, the model developed by J.L.Guyader in 1978 exhibits high agreement wit... Read More about A simple equivalent plate model for dynamic bending stiffness of three-layer sandwich panels with shearing core.

Comparison of equivalent plate models using wavenumber approach (2020)
Conference Proceeding
Arasan, U., Marchetti, F., Chevillotte, F., Becot, F., Ege, K., Chronopoulos, D., & Gourdon, E. (2020). Comparison of equivalent plate models using wavenumber approach.

Mutli-layered structures (such as sandwich panels) are commonly used in engineering applications for the improved sound comfort and noise reduction. Finite Element modelling of these layered structures would often results in increased total number of... Read More about Comparison of equivalent plate models using wavenumber approach.

OptiSens—Convex optimization of sensor and actuator placement for ultrasonic guided-wave based structural health monitoring (2020)
Journal Article
Cantero-Chinchilla, S., Beck, J. L., Chiachío, J., Chiachío, M., & Chronopoulos, D. (2021). OptiSens—Convex optimization of sensor and actuator placement for ultrasonic guided-wave based structural health monitoring. SoftwareX, 13, Article 100643. https://doi.org/10.1016/j.softx.2020.100643

This paper presents OptiSens, a computational platform in Python and Matlab, that provides optimal sensor and actuator configurations for structural health monitoring applications using ultrasonic guided-waves. This software formulates a convex entro... Read More about OptiSens—Convex optimization of sensor and actuator placement for ultrasonic guided-wave based structural health monitoring.

On the accuracy limits of plate theories for vibro-acoustic predictions (2020)
Journal Article
Arasan, U., Marchetti, F., Chevillotte, F., Tanner, G., Chronopoulos, D., & Gourdon, E. (2021). On the accuracy limits of plate theories for vibro-acoustic predictions. Journal of Sound and Vibration, 493, Article 115848. https://doi.org/10.1016/j.jsv.2020.115848

Several vibro-acoustic models for either single wall or multi-layer constructions are based on classical plate and first order shear deformation theories. The equivalent or condensed plate models employ the thin plate model to extract the dynamic mec... Read More about On the accuracy limits of plate theories for vibro-acoustic predictions.

The impact of mesoscale textile architecture on the structural damping in composite structures (2020)
Journal Article
Thierry, V., & Chronopoulos, D. (2020). The impact of mesoscale textile architecture on the structural damping in composite structures. Composite Structures, 249, https://doi.org/10.1016/j.compstruct.2020.112475

In this article, a method allowing for prediction of the effective structural damping given the mesoscale architecture of a composite is presented. The method enables a fast and accurate calculation of the loss factor as a function of the direction o... Read More about The impact of mesoscale textile architecture on the structural damping in composite structures.

A unified scheme to solving arbitrary complex-valued ratio distribution with application to statistical inference for raw frequency response functions and transmissibility functions (2020)
Journal Article
Yan, W. J., Zhao, M. Y., Beer, M., Ren, W. X., & Chronopoulos, D. (2020). A unified scheme to solving arbitrary complex-valued ratio distribution with application to statistical inference for raw frequency response functions and transmissibility functions. Mechanical Systems and Signal Processing, 145, Article 106886. https://doi.org/10.1016/j.ymssp.2020.106886

© 2020 Elsevier Ltd Complex-valued ratio distributions arises in many real applications such as statistical inference for frequency response functions (FRFs) and transmissibility functions (TFs) in structural health monitoring. As a sequel to our pre... Read More about A unified scheme to solving arbitrary complex-valued ratio distribution with application to statistical inference for raw frequency response functions and transmissibility functions.

Optimal sensor and actuator placement for structural health monitoring via an efficient convex cost-benefit optimization (2020)
Journal Article
Cantero-Chinchilla, S., Beck, J. L., Chiachío, M., Chiachío, J., Chronopoulos, D., & Jones, A. (2020). Optimal sensor and actuator placement for structural health monitoring via an efficient convex cost-benefit optimization. Mechanical Systems and Signal Processing, 144, Article 106901. https://doi.org/10.1016/j.ymssp.2020.106901

© 2020 Elsevier Ltd The number and position of sensors and actuators are key decision variables that dictate the performance of any structural health monitoring system. This paper proposes choosing them optimally by using an objective function that c... Read More about Optimal sensor and actuator placement for structural health monitoring via an efficient convex cost-benefit optimization.

Designing Rainbow Metamaterials (2020)
Conference Proceeding
Meng, H., & Chronopoulos, D. (2020). Designing Rainbow Metamaterials

Nonperiodic metamaterials can have better vibration attenuation than periodic metamaterials with properly designed resonator distributions. In this study, we propose optimal design routes for rainbow metamaterials. The rainbow metamaterials are nonpe... Read More about Designing Rainbow Metamaterials.

Transient ultrasonic guided wave simulation in layered composite structures using a hybrid wave and finite element scheme (2020)
Journal Article
Malik, M. K., Chronopoulos, D., & Tanner, G. (2020). Transient ultrasonic guided wave simulation in layered composite structures using a hybrid wave and finite element scheme. Composite Structures, 246, https://doi.org/10.1016/j.compstruct.2020.112376

A guided wave simulation method for layered composites based on the wave and finite element scheme is presented. An approach for calculating complex displacement fields such as those generated from piezoelectric transducers is developed. The scatteri... Read More about Transient ultrasonic guided wave simulation in layered composite structures using a hybrid wave and finite element scheme.

A fast Bayesian inference scheme for identification of local structural properties of layered composites based on wave and finite element-assisted metamodeling strategy and ultrasound measurements (2020)
Journal Article
Yan, W. J., Chronopoulos, D., Cantero-Chinchilla, S., Yuen, K. V., & Papadimitriou, C. (2020). A fast Bayesian inference scheme for identification of local structural properties of layered composites based on wave and finite element-assisted metamodeling strategy and ultrasound measurements. Mechanical Systems and Signal Processing, 143, Article 106802. https://doi.org/10.1016/j.ymssp.2020.106802

© 2020 Elsevier Ltd Reliable verification and evaluation of the mechanical properties of a layered composite ensemble are critical for industrially relevant applications, however it still remains an open engineering challenge. In this study, a fast B... Read More about A fast Bayesian inference scheme for identification of local structural properties of layered composites based on wave and finite element-assisted metamodeling strategy and ultrasound measurements.

Experimental and numerical determination of the wave dispersion characteristics of complex 3D woven composites (2020)
Journal Article
Thierry, V., Mesnil, O., & Chronopoulos, D. (2020). Experimental and numerical determination of the wave dispersion characteristics of complex 3D woven composites. Ultrasonics, 103, https://doi.org/10.1016/j.ultras.2020.106068

In this article, an attempt is made towards the experimental validation of a numerical method allowing vibro-acoustic and ultrasonic wave propagation analysis of complex woven composites. For this validation, three different woven architectures were... Read More about Experimental and numerical determination of the wave dispersion characteristics of complex 3D woven composites.

Comparison of transmission loss prediction using condensed equivalent plate models (2019)
Conference Proceeding
Uthayasuriyan, A., Chevillotte, F., Luc, J., Chronopoulos, D., & Gourdon, E. (2019). Comparison of transmission loss prediction using condensed equivalent plate models. In Proceedings of the ICA 2019 and EAA Euroregio 23rd International Congress on Acoustics, integrating 4th EAA Euroregio 2019, 9 - 13 September 2019, Aachen, Germany, 273-280

Equivalent plate models are commonly used in order to simulate multilayer system as one single layer. This kind of approach enables for instance to reduce the mesh size and thus the number of degrees of freedom in finite element models. Usual condens... Read More about Comparison of transmission loss prediction using condensed equivalent plate models.

The use of free-space microwave non-destructive techniques: simulation of damage detection in carbon fibre reinforced composites (2019)
Conference Proceeding
Munalli, D., Dimitrakis, G., Chronopoulos, D., Greedy, S., & Long, A. (2019). The use of free-space microwave non-destructive techniques: simulation of damage detection in carbon fibre reinforced composites

Microwave non-destructive testing (MNDT) methods represent an effective solution in detecting defects within composite structures with relatively low electrical conductivity. They offer the advantage to overcome the problems of traditional NDT techni... Read More about The use of free-space microwave non-destructive techniques: simulation of damage detection in carbon fibre reinforced composites.

Uncertainties in the attenuation performance of a multi-frequency metastructure from additive manufacturing (2019)
Journal Article
Fabro, A. T., Meng, H., & Chronopoulos, D. (2020). Uncertainties in the attenuation performance of a multi-frequency metastructure from additive manufacturing. Mechanical Systems and Signal Processing, 138, https://doi.org/10.1016/j.ymssp.2019.106557

Additive manufacturing has been used to propose several designs of phononic crystals and metamaterials due to the low cost to produce complex geometrical features. However, like any other manufacturing process, it can introduce material and geometric... Read More about Uncertainties in the attenuation performance of a multi-frequency metastructure from additive manufacturing.