kth.sePublications
Change search
Link to record
Permanent link

Direct link
Publications (10 of 206) Show all publications
Schöggl, J.-P., Baumgartner, R. J., O'Reilly, C. J., Bouchouireb, H. & Göransson, P. (2024). Barriers to sustainable and circular product design: A theoretical and empirical prioritisation in the European automotive industry. Journal of Cleaner Production, 434, Article ID 140250.
Open this publication in new window or tab >>Barriers to sustainable and circular product design: A theoretical and empirical prioritisation in the European automotive industry
Show others...
2024 (English)In: Journal of Cleaner Production, ISSN 0959-6526, E-ISSN 1879-1786, Vol. 434, article id 140250Article in journal (Refereed) Published
Abstract [en]

Despite the increasing availability of tools and methods for sustainable and circular product design (DfS), their uptake in practice is slow. This is also true in the automotive industry, where DfS is an important measure for addressing the industry's negative environmental and social impacts. To facilitate DfS implementation, this paper uses an analytic hierarchy process (AHP) and offers, for the first time, a classification and prioritisation of the barriers that need to be overcome when implementing DfS into vehicle development processes. Based on a systematic literature review and on an expert workshop, the top 15 DfS barrier factors were derived and divided equally into five groups, following a multi-level structure. These factors and groups formed the input for a survey-based analytic hierarchy process with 38 European industry experts. The results show that strategic issues are the most important barriers, followed by the group of operational, personal, external, and tool-related barriers. Among the 15 barrier factors identified, the top five were (1) an unclear link to profitability, (2) lack of top management support, (3) difficulties in handling trade-offs, (4) high operational costs, and (5) a lack of integration of DfS into corporate strategy. The results indicate that while external constraints already exert pressure on automotive companies, they still face particular challenges when attempting to integrate sustainability into corporate strategies and in transferring such strategies to DfS activities at the operational level. The study results may be used to inform managerial policy and further research.

Keywords
Eco design, Design for circularity, Challenges, Vehicle engineering, Empirical survey
National Category
Vehicle Engineering Design
Identifiers
urn:nbn:se:kth:diva-340999 (URN)10.1016/j.jclepro.2023.140250 (DOI)001148980100001 ()2-s2.0-85180964341 (Scopus ID)
Note

QC 20240109

Available from: 2023-12-18 Created: 2023-12-18 Last updated: 2024-02-13Bibliographically approved
Larsson, J., Göransson, P. & Wennhage, P. (2023). A sequential mixed-integer programming method for concurrent optimization of core topology and face sheet thickness of a sandwich beam. Journal of Sandwich Structures and Materials, 25(6), 666-686
Open this publication in new window or tab >>A sequential mixed-integer programming method for concurrent optimization of core topology and face sheet thickness of a sandwich beam
2023 (English)In: Journal of Sandwich Structures and Materials, ISSN 1099-6362, E-ISSN 1530-7972, Vol. 25, no 6, p. 666-686Article in journal (Refereed) Published
Abstract [en]

A method is proposed that allows for the concurrent optimization of core topology and face sheet thickness of a sandwich beam under compliance constraints. The problem is solved using a novel mixed-linear extension of the Topology Optimization of Binary Structure (TOBS) topology optimization method aiming to minimize the total mass of the beam. The method has been demonstrated on a clamped beam example and the results have been compared to results from topology optimization of the core with a range of a priori fixed face sheet thicknesses. It is shown that the new method, starting from a fully populated core, finds a minimum mass that is lower than but in the neighbourhood of the best results from the topology optimization with fixed face sheet thicknesses. By varying the compliance constraint it is shown that the core topology approaches an ideal corrugated geometry as the compliance constraint is relaxed. The trends observed in the results are compared to analytical models for an idealized core.

Place, publisher, year, edition, pages
SAGE Publications, 2023
Keywords
concurrent optimization, mass minimization, mixed-integer linear programming, sandwich structures, Topology optimization
National Category
Computational Mathematics Fluid Mechanics and Acoustics
Identifiers
urn:nbn:se:kth:diva-338569 (URN)10.1177/10996362231174901 (DOI)000986386300001 ()2-s2.0-85161710719 (Scopus ID)
Note

QC 20231107

Available from: 2023-11-07 Created: 2023-11-07 Last updated: 2023-11-07Bibliographically approved
Lähivaara, T., Göransson, P., Heinonen, S., Bojan, B., Hesthaven, J. S., Khalili, M., . . . Vauhkonen, M. (2023). Monitoring of water table level and volume of water in a porous storage by seismic data. In: 29th European Meeting of Environmental and Engineering Geophysics, Held at Near Surface Geoscience Conference and Exhibition 2023, NSG 2023: . Paper presented at 29th European Meeting of Environmental and Engineering Geophysics, Held at Near Surface Geoscience Conference and Exhibition 2023, NSG 2023, Edinburgh, United Kingdom of Great Britain and Northern Ireland, Sep 3 2023 - Sep 7 2023. EAGE Publications bv
Open this publication in new window or tab >>Monitoring of water table level and volume of water in a porous storage by seismic data
Show others...
2023 (English)In: 29th European Meeting of Environmental and Engineering Geophysics, Held at Near Surface Geoscience Conference and Exhibition 2023, NSG 2023, EAGE Publications bv , 2023Conference paper, Published paper (Refereed)
Abstract [en]

Neural networks provide an attractive framework to monitor the water table level and the volume of stored water in porous media from seismic data in an automated, fast and cost-efficient manner. In this work, a subsurface reservoir is modeled as a coupled three-dimensional poroviscoelastic-viscoelastic medium. The wave propagation from source to receiver(s) is numerically simulated using a nodal discontinuous Galerkin method coupled with an Adams-Bashforth time-stepping scheme on a graphics processing unit cluster. The wave field solver is used to generate databases for the neural network model to estimate the water table level and actual volume of water. We use a deconvolution-based approach to normalize the effect from the source wavelet. The results demonstrate the capacity of the fully connected neural network for estimating both the water table level and the volume of stored water in the porous storage reservoir from both synthetic and measured data.

Place, publisher, year, edition, pages
EAGE Publications bv, 2023
National Category
Water Engineering Oceanography, Hydrology and Water Resources Geophysics
Identifiers
urn:nbn:se:kth:diva-342816 (URN)10.3997/2214-4609.202320058 (DOI)2-s2.0-85182924201 (Scopus ID)
Conference
29th European Meeting of Environmental and Engineering Geophysics, Held at Near Surface Geoscience Conference and Exhibition 2023, NSG 2023, Edinburgh, United Kingdom of Great Britain and Northern Ireland, Sep 3 2023 - Sep 7 2023
Note

Part of proceedings ISBN 9789462824607

QC 20240201

Available from: 2024-01-31 Created: 2024-01-31 Last updated: 2024-02-01Bibliographically approved
Shahrezaei, K., O'Reilly, C. J., Lähivaara, T. & Göransson, P. (2023). Transport efficiency of delivery trucks: A study of coupling vehicle design and transport system through functional modelling and optimisation. In: Proceedings of the International Conference on Engineering Design, ICED 2023: . Paper presented at 24th International Conference on Engineering Design, ICED 2023, Bordeaux, France, Jul 24 2023 - Jul 28 2023 (pp. 3631-3640). Cambridge University Press (CUP)
Open this publication in new window or tab >>Transport efficiency of delivery trucks: A study of coupling vehicle design and transport system through functional modelling and optimisation
2023 (English)In: Proceedings of the International Conference on Engineering Design, ICED 2023, Cambridge University Press (CUP) , 2023, p. 3631-3640Conference paper, Published paper (Refereed)
Abstract [en]

To enable the emergence of new and efficient vehicle design from the transport system perspective, a formulation of a multifunctional vehicle-transport design optimisation problem is presented. System- wide measures of transportation and vehicle efficiency measures are conceptually considered in an integrative design approach to drive the transport solutions towards more resource-efficient and eventually more sustainable solutions. Considered efficiency measures associated with the system-wide aspect are namely, productivity and service efficiency, and measures associated with vehicle attributes are namely mass and shape efficiency. The conflicting nature of these measures is balanced using optimisation methodologies through multiple transportation scenarios with varying transport demand and deterministic drive cycles. The obtained optimisation results demonstrated that there is a strong interconnectivity between the vehicle's overall configuration and transportation aspects. Thus, conceptually demonstrating how the inclusion of various transport-vehicle efficiency measures simultaneously in an integrative design approach during the early vehicle design may yield a more efficient and better overall system performance.

Place, publisher, year, edition, pages
Cambridge University Press (CUP), 2023
Keywords
Conceptual design, Design for X (DfX), Early design phases, Optimisation, Resource efficient vehicles
National Category
Transport Systems and Logistics Vehicle Engineering
Identifiers
urn:nbn:se:kth:diva-334430 (URN)10.1017/pds.2023.364 (DOI)2-s2.0-85165507281 (Scopus ID)
Conference
24th International Conference on Engineering Design, ICED 2023, Bordeaux, France, Jul 24 2023 - Jul 28 2023
Note

QC 20230822

Available from: 2023-08-22 Created: 2023-08-22 Last updated: 2023-08-22Bibliographically approved
Semeniuk, B. & Göransson, P. (2022). A constitutive model for the acoustics of packed spheres and particles. In: Proceedings ISMA 2022: . Paper presented at 30th International Conference on Noise and Vibration engineering (ISMA2022), 12-14 September 2022.
Open this publication in new window or tab >>A constitutive model for the acoustics of packed spheres and particles
2022 (English)In: Proceedings ISMA 2022, 2022Conference paper, Published paper (Refereed)
Abstract [en]

Constitutive models for the vibroacoustics of porous materials have previously been defined for lattice cell,foam and fibrous materials in terms of dynamic viscous drag forces and oscillatory solid to fluid heat transfereffects. Where the microgeometries are cylindrical in nature, analytical expressions have been derived toefficiently represent the viscous and thermal effects. A logical extension of this work is towards porous materials consisting of spherical shapes, which may also be defined using analytical relations. In this work, theanalytical dynamic viscous drag force and oscillatory thermal impedance expressions of a sphere undergoingrectilinear oscillations in a viscous fluid are derived. A transfer matrix model of acoustic wave propagation isthen used to predict the sound absorption performance of an array of packed spheres, using only the porosityand mean diameters of the spheres, and the constitutive properties of the solid spheres and the surroundingviscous fluid as modelling inputs. The results compare very well with published measurements

National Category
Applied Mechanics
Research subject
Engineering Mechanics
Identifiers
urn:nbn:se:kth:diva-327843 (URN)
Conference
30th International Conference on Noise and Vibration engineering (ISMA2022), 12-14 September 2022
Funder
Vinnova
Note

QC 20230614

Available from: 2023-05-31 Created: 2023-05-31 Last updated: 2023-06-14Bibliographically approved
Larsson, J., Göransson, P., Wennhage, P., O'Reilly, C. J. & Bouchouireb, H. (2022). A life cycle energy driven concurrent optimization of core topology and face sheet thickness of a sandwich beam. In: Proceedings of the 6th Brazilian Conference on Composite Materials: . Paper presented at Proceedings of the 6th Brazilian Conference on Composite Materials (Part of ISSN 2316-1337), Organised and Edited by R.J. da Silva & T.H. Panzera (pp. 43-48).
Open this publication in new window or tab >>A life cycle energy driven concurrent optimization of core topology and face sheet thickness of a sandwich beam
Show others...
2022 (English)In: Proceedings of the 6th Brazilian Conference on Composite Materials, 2022, p. 43-48Conference paper, Published paper (Other academic)
Abstract [en]

Given the increasing importance of sustainability in product design, tools for designing products with low environmental impact are important for tackling problems in the future. One important measure of environmental impact is life cycle energy (LCE), which uses the cumulative amount of energy a product consumes over its’ lifetime as a proxy for environmental impact. In this work, the core topology and face sheet thickness of a sandwich beam are optimized for different material compositions with the goal to minimize the life cycle energy of the beam. A constraint on the mean compliance of the beam is used as a proxy for functional requirements. The problem is solved using a mixed-integer programming extension of the established Topology Optimization of Binary Structures (TOBS) method. Numerical examples indicate that the method is able to find feasible minimum LCE solutions with varying topologies and face sheet thicknesses.

Keywords
Topology optimization, TOBS, Life-cycle energy, Sandwich
National Category
Mechanical Engineering
Identifiers
urn:nbn:se:kth:diva-317077 (URN)
Conference
Proceedings of the 6th Brazilian Conference on Composite Materials (Part of ISSN 2316-1337), Organised and Edited by R.J. da Silva & T.H. Panzera
Note

Part of proceedings: DOI 10.29327/566492, QC 20220906

Available from: 2022-09-05 Created: 2022-09-05 Last updated: 2022-09-06Bibliographically approved
Cuenca, J., Göransson, P., De Ryck, L. & Lahivaara, T. (2022). Deterministic and statistical methods for the characterisation of poroelastic media from multi-observation sound absorption measurements. Mechanical systems and signal processing, 163, Article ID 108186.
Open this publication in new window or tab >>Deterministic and statistical methods for the characterisation of poroelastic media from multi-observation sound absorption measurements
2022 (English)In: Mechanical systems and signal processing, ISSN 0888-3270, E-ISSN 1096-1216, Vol. 163, article id 108186Article in journal (Refereed) Published
Abstract [en]

This paper proposes a framework for the estimation of the transport and elastic properties of open-cell poroelastic media based on sound absorption measurements. The sought properties are the Biot-Johnson-Champoux-Allard model parameters, namely five transport parameters, two elastic properties and the mass density, as well as the sample thickness. The methodology relies on a multi-observation approach, consisting in combining multiple independent measurements into a single dataset, with the aim of over-determining the problem. In the present work, a poroelastic sample is placed in an impedance tube and tested in two loading conditions, namely in a rigid-backing configuration and coupled to a resonant expansion chamber. Given the nonmonotonic nature of the experimental data, an incremental parameter estimation procedure is used in order to guide the model parameters towards the global solution without terminating at local minima. A statistical inversion approach is also discussed, providing refined point estimates, uncertainty ranges and parameter correlations. The methodology is applied to the characterisation of a sample of melamine foam and provides estimates of all nine parameters with compact uncertainty ranges. It is shown that the model parameters are retrieved with a lower uncertainty in the multi-observation case, as compared with a single-observation case. The method proposed here does not require prior knowledge of the thickness or any of the properties of the sample, and can be carried out with a standard two-microphone impedance tube.

Place, publisher, year, edition, pages
Elsevier BV, 2022
Keywords
Poroelastic media, Parameter estimation, Coupled problems, Deterministic framework, Bayesian framework, Uncertainty quantification
National Category
Probability Theory and Statistics
Identifiers
urn:nbn:se:kth:diva-300940 (URN)10.1016/j.ymssp.2021.108186 (DOI)000687337800007 ()2-s2.0-85109007617 (Scopus ID)
Note

QC 20210903

Available from: 2021-09-03 Created: 2021-09-03 Last updated: 2022-06-25Bibliographically approved
Mao, H., Gaborit, M., Lundberg, E., Rumpler, R., Yin, B. & Göransson, P. (2022). Dynamic behaviour of low- to high-density anisotropic cellular materials. Journal of Sound and Vibration, 536, Article ID 117137.
Open this publication in new window or tab >>Dynamic behaviour of low- to high-density anisotropic cellular materials
Show others...
2022 (English)In: Journal of Sound and Vibration, ISSN 0022-460X, E-ISSN 1095-8568, Vol. 536, article id 117137Article in journal (Refereed) Published
Abstract [en]

The dynamic behaviour of a novel anisotropic cellular micro-structural geometry derived from the basic symmetric Kelvin cell is discussed for varying relative density. The cells are arranged in a cubic array and the dynamic response is studied in a classical seismic mass setup using beam elements to represent the ligaments of the cell. The eigenfrequencies and the eigenmodes of the cellular array are computed together with forced response simulations where a proportional damping model of the Young's modulus for the cell ligaments is assumed. The frequency dependence of the damping is based on a fractional derivative representation. Using a recently developed inversion method, equivalent, homogenised solid material models of the cellular array are discussed with the associated equivalent elastic properties given in terms of the 21 elastic constants of the Hooke's tensor. For the equivalent solid material models, the eigenfrequencies and eigenmodes are computed, and forced response simulations are performed assuming the same type of proportionality in the damping as the cellular array, for the same seismic mass setup. The correlation, between the eigenfrequencies and the eigenmodes, shows an overall interesting agreement between the cellular and the equivalent solid model for the quite complex deformation shapes observed. The forced response results indicate that the equivalent solid modelling accurately represents the global dynamics of the anisotropic cellular array, but needs to be further refined when local shearing deformation within the individual cells starts to be dominating.

Place, publisher, year, edition, pages
Elsevier BV, 2022
Keywords
Kelvincell, Microstructure, Low-tohigh-density, Anisotropic, Inverseestimation, Auxetic, Viscoelastic, Localshear
National Category
Medical Laboratory and Measurements Technologies
Identifiers
urn:nbn:se:kth:diva-320305 (URN)10.1016/j.jsv.2022.117137 (DOI)000861564300004 ()2-s2.0-85132929832 (Scopus ID)
Note

QC 20221024

Available from: 2022-10-24 Created: 2022-10-24 Last updated: 2022-10-24Bibliographically approved
Laudato, M., Manzari, L., Göransson, P., Giorgio, I. & Abali, B. E. (2022). Experimental analysis on metamaterials boundary layers by means of a pantographic structure under large deformations. Mechanics research communications, 125, 103990, Article ID 103990.
Open this publication in new window or tab >>Experimental analysis on metamaterials boundary layers by means of a pantographic structure under large deformations
Show others...
2022 (English)In: Mechanics research communications, ISSN 0093-6413, E-ISSN 1873-3972, Vol. 125, p. 103990-, article id 103990Article in journal (Refereed) Published
Abstract [en]

In this work, the dynamical behavior of a pantographic structure undergoing large deformations is analyzed. A harmonic force is applied on the structure, while its motion in time is recorded by means of a high-speed camera system. The resulting displacement field is obtained via the digital image correlation (DIC) method for the whole domain. A parametric study with respect to the amplitude of the imposed force exhibits the appearance of non-linear effects in the system response as well as the presence of a so-called boundary layer region. Such geometric nonlinearities are of paramount interest for studying the accuracy of a potential computational model. Boundary layers are known to be effected by the microstructure, but their roles in the system response are yet to be comprehended. The experimental results obtained in this work may be used as a benchmark case in modeling metamaterials.

Place, publisher, year, edition, pages
Elsevier BV, 2022
Keywords
Metamaterial dynamics, Pantographic sheets, Second gradient materials, Digital image correlation analysis
National Category
Applied Mechanics
Identifiers
urn:nbn:se:kth:diva-321616 (URN)10.1016/j.mechrescom.2022.103990 (DOI)000867446400009 ()2-s2.0-85138474713 (Scopus ID)
Note

QC 20221118

Available from: 2022-11-18 Created: 2022-11-18 Last updated: 2022-11-18Bibliographically approved
Larsson, J., Göransson, P. & Wennhage, P. (2022). Mass minimization of load carrying sandwich structures subjected to dynamic loads by concurrent optimization of core topology and face sheet thickness. In: ISMA 2022: . Paper presented at ISMA 2022.
Open this publication in new window or tab >>Mass minimization of load carrying sandwich structures subjected to dynamic loads by concurrent optimization of core topology and face sheet thickness
2022 (English)In: ISMA 2022, 2022Conference paper, Published paper (Refereed)
National Category
Applied Mechanics
Identifiers
urn:nbn:se:kth:diva-327844 (URN)
Conference
ISMA 2022
Funder
VinnovaEU, Horizon 2020
Note

QC 20230612

Available from: 2023-05-31 Created: 2023-05-31 Last updated: 2023-06-12Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0003-1855-5437

Search in DiVA

Show all publications