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Serafini, A. & Kumar, U. (2026). Physics-Informed Neural Network Framework for Wheel-Rail Contact Analysis: Toward an Intelligent Maintenance Workflow in Railway Systems. PROMET: Traffic&Transportation
Open this publication in new window or tab >>Physics-Informed Neural Network Framework for Wheel-Rail Contact Analysis: Toward an Intelligent Maintenance Workflow in Railway Systems
2026 (English)In: PROMET: Traffic&Transportation, ISSN 0353-5320, E-ISSN 1848-4069Article in journal (Refereed) Accepted
Abstract [en]

Railway transportation traffic is rapidly growing, which demands a more effective and efficient generation analysis for more reliable predictive maintenance planning. This is achievable if prognostic indicators are known, e.g. stress, deformation and displacement fields. These parameter values unlock the underlying physics knowledge about fault modes and mechanisms to solve the wheel-rail deterioration. Commercial multi-physics software lack source code accessibility, flexibility and interoperability between computing platforms. On the other hand, physics-informed neural networks (PINNs), which belong to the second AI revolution and scientific ML (SciML) that combines physical and machine learning models, show promise in computational fluid dynamics and electrodynamics; however, their application to railwayremains largely unexplored.  This study addresses these research gaps through a comprehensive open-source and reproducible PINN PhysicsNeMo framework for 3D wheel-rail contact analysis as proof of concept. Current railway maintenance often relies on reactive approaches; this PhysicsNeMo framework supports integration by providing predictive stress analyses. The aim is to explore the PhysicsNeMo simulations for railway, establishing a foundation for an interpretable, explainable and trustworthy AI. Results demonstrate detailed and intuitive 3D wheel visualisations of stress distributions and displacement fields, with insights into damage mechanisms for railway designers and maintainers, facilitating more efficient maintenance workflows.

Place, publisher, year, edition, pages
University of Zabreb, 2026
Keywords
Railway, wheel-rail contact, physics-informed neural network, open-source framework, high-performance computing, intelligent maintenance
National Category
Reliability and Maintenance Artificial Intelligence
Research subject
Operation and Maintenance Engineering
Identifiers
urn:nbn:se:ltu:diva-115666 (URN)
Projects
Academics4Rail
Funder
Swedish Transport AdministrationLuleå Railway Research Centre (JVTC)European Commission, Europe's Rail
Note

Full text license: CC BY 4.0

Available from: 2025-12-02 Created: 2025-12-02 Last updated: 2025-12-02
Saxena, U. R., Karim, R. & Kumar, U. (2025). An insight towards trustworthy cloud computing: enabling restricted access control and secure service transactions using Ethereum blockchain. International Journal of Systems Assurance Engineering and Management, 16(11), 3639-3654
Open this publication in new window or tab >>An insight towards trustworthy cloud computing: enabling restricted access control and secure service transactions using Ethereum blockchain
2025 (English)In: International Journal of Systems Assurance Engineering and Management, ISSN 0975-6809, E-ISSN 0976-4348, Vol. 16, no 11, p. 3639-3654Article in journal (Refereed) Published
Abstract [en]

Cloud computing has become an essential paradigm for modern enterprises by providing scalable, on-demand access to computational resources. Despite its widespread adoption, significant concerns persist regarding data security, integrity, and the trustworthiness of service transactions—particularly due to the centralized nature of conventional cloud infrastructures. This paper presents a novel cloud framework that integrates Ethereum blockchain technology to enhance trust, enforce restricted access control, and secure service interactions. The proposed approach employs a two-factor authentication mechanism combined with blockchain-based smart contracts to authenticate legitimate service requests, record immutable transaction logs, and mitigate prevalent threats such as Distributed Denial-of-Service (DDoS) and Sybil attacks. By embedding access control policies directly into the blockchain, the framework ensures transparency, immutability, and resilience against unauthorized data manipulation. Experimental validation demonstrates the framework's effectiveness in improving the security, reliability, and scalability of cloud environments. The findings highlight the potential of blockchain as a foundational technology for developing trustworthy and robust cloud computing systems.

Place, publisher, year, edition, pages
Springer, 2025
Keywords
Cloud computing, Security, Access control, Blockchain, DDoS attack, Sybil attack, Authentication, Smart contracts
National Category
Computer Sciences Computer Systems
Research subject
Operation and Maintenance Engineering
Identifiers
urn:nbn:se:ltu:diva-114165 (URN)10.1007/s13198-025-02878-2 (DOI)001535966800001 ()2-s2.0-105011653188 (Scopus ID)
Note

Validerad;2025;Nivå 1;2025-11-04 (u8);

Available from: 2025-08-05 Created: 2025-08-05 Last updated: 2025-11-28Bibliographically approved
Kumar, U. (2025). Asset Maintenance in Railway: Powered by New Technology and Driven by Sustainability. In: Sanjay K. Chaturvedi, Heeralal Gargama, Rajiv N. Rai (Ed.), Design and Manufacturing Practices for Performability Engineering: (pp. 159-184). John Wiley & Sons
Open this publication in new window or tab >>Asset Maintenance in Railway: Powered by New Technology and Driven by Sustainability
2025 (English)In: Design and Manufacturing Practices for Performability Engineering / [ed] Sanjay K. Chaturvedi, Heeralal Gargama, Rajiv N. Rai, John Wiley & Sons, 2025, p. 159-184Chapter in book (Other academic)
Place, publisher, year, edition, pages
John Wiley & Sons, 2025
National Category
Other Civil Engineering Reliability and Maintenance
Research subject
Operation and Maintenance Engineering
Identifiers
urn:nbn:se:ltu:diva-116054 (URN)10.1002/9781394345731.ch7 (DOI)2-s2.0-105021621443 (Scopus ID)
Note

ISBN for host publication: 9781394345700, 9781394345731;

Available from: 2026-01-19 Created: 2026-01-19 Last updated: 2026-01-19Bibliographically approved
Vila Forteza, M., Galar, D., Kumar, U. & Goebel, K. (2025). Data Reduction in Proportional Hazards Models Applied to Reliability Prediction of Centrifugal Pumps. Machines, 13(3), Article ID 215.
Open this publication in new window or tab >>Data Reduction in Proportional Hazards Models Applied to Reliability Prediction of Centrifugal Pumps
2025 (English)In: Machines, E-ISSN 2075-1702, Vol. 13, no 3, article id 215Article in journal (Refereed) Published
Abstract [en]

This paper presents the use of proportional hazards regression models for predicting the Mean Time Between Failures (MTBF) of centrifugal pumps in the oil and gas industry. To that end, a dataset collected over 8 years including both design and operational variables from 675 pumps in an oil refinery was used to fit statistical models. Parametric and non-parametric transformations and restricted cubic splines were used to fit the covariates, thereby relaxing linearity assumptions and potentiating predictors with strong nonlinear effects on the outcome. Standard Principal Component Analysis (PCA) and sparse robust PCA methods were used for data reduction to simplify the fitted models and minimize overfitting. Models fitted with sparse robust PCA on non-parametrically transformed variables using an additive variance stabilizing (AVAS) method are suggested for further investigation. The complexity of the fitted models was reduced by 85% while at the same time providing for a more robust model as indicated by an improvement of the calibration slope from 0.830 to 0.936 with an essentially stable Akaike information criterion (AIC) (0.34% increase).

Place, publisher, year, edition, pages
MDPI, 2025
Keywords
centrifugal pumps, MTBF, API standard, reliability prediction, proportional hazards model, data reduction
National Category
Probability Theory and Statistics
Research subject
Operation and Maintenance Engineering
Identifiers
urn:nbn:se:ltu:diva-111941 (URN)10.3390/machines13030215 (DOI)001452781700001 ()2-s2.0-105001159780 (Scopus ID)
Note

Validerad;2025;Nivå 2;2025-03-10 (u2);

Full text: CC BY license;

Available from: 2025-03-10 Created: 2025-03-10 Last updated: 2025-10-21Bibliographically approved
Kour, R., Karim, R., Venkatesh, N. & Kumar, U. (2025). Metaverse in industrial contexts - a comprehensive review. Frontiers in Virtual Reality, 6, Article ID 1488926.
Open this publication in new window or tab >>Metaverse in industrial contexts - a comprehensive review
2025 (English)In: Frontiers in Virtual Reality, E-ISSN 2673-4192, Vol. 6, article id 1488926Article, review/survey (Refereed) Published
Abstract [en]

This paper explores the potential of Metaverse technology in industrial Asset Management (AM). By integrating AI and digital technologies, the Metaverse can enhance Human-System-Interaction (HSI) and optimise AM processes. However, implementing a Metaverse in industrial contexts faces challenges, particularly in visualising physical and virtual assets. This paper conducts a systematic review to address these challenges and identify potential solutions. The findings reveal that while the necessary technologies are available, their widespread adoption in industrial AM is limited. The paper presents a comprehensive overview of research themes related to Metaverse applications in industrial contexts, highlighting the evolving landscape and potential benefits. Ultimately, this research aims to contribute to the advancement of Metaverse technology in industrial AM by providing insights into its development, implementation, and challenges along with an Industrial Metaverse Framework. An example of applying the Metaverse concept in the railway sector has been presented and validated using railway digital assets available within the eMaintenance LAB. The practical implications of this work are expected to result in increased efficiency and effectiveness in the operation and maintenance procedures across various industrial sectors.

Place, publisher, year, edition, pages
Frontiers Media S.A., 2025
Keywords
Industrial, Metaverse, review, Railway, asset management
National Category
Computer Systems
Research subject
Operation and Maintenance Engineering
Identifiers
urn:nbn:se:ltu:diva-111280 (URN)10.3389/frvir.2025.1488926 (DOI)001416226600001 ()2-s2.0-85217404971 (Scopus ID)
Funder
VinnovaLuleå Railway Research Centre (JVTC)
Note

Validerad;2025;Nivå 1;2025-02-20 (u8);

Full text license: CC BY

Available from: 2025-01-13 Created: 2025-01-13 Last updated: 2025-10-21Bibliographically approved
Serafini, A. & Kumar, U. (2025). Physics-Informed Neural Networks, an Instrumentfor solving a 3D Wheel-Rail Interface, To facilitate Prognostics Root Cause Analysis. In: TRANSBALTICA XVI: Transportation Science and Technology: Proceedings of the International Conference TRANSBALTICA, September 18-19, 2025, Vilnius, Lithuania. Paper presented at 16th International Conference TRANSBALTICA 2025: Transportation Science and Technology, Vilnius, Lithuania, September 18–19, 2025. Springer Nature
Open this publication in new window or tab >>Physics-Informed Neural Networks, an Instrumentfor solving a 3D Wheel-Rail Interface, To facilitate Prognostics Root Cause Analysis
2025 (English)In: TRANSBALTICA XVI: Transportation Science and Technology: Proceedings of the International Conference TRANSBALTICA, September 18-19, 2025, Vilnius, Lithuania, Springer Nature, 2025Conference paper, Published paper (Refereed)
Abstract [en]

Railway transportation demand is rapidly increasing, which requires enhanced prognostics and health management (PHM) approaches for effective predictive maintenance planning. There has been a significant evolution in prognostics and prediction techniques, e.g. reliability-, damage accumulation-, data analytics- and condition-based prediction. However, the ability to predict damage progression requires an understanding of initiation criteria or root causes through accurate stress, displacement, and deformation field analysis. However, existing commercial multiphysics simulation tools lack the source code accessibility, customisation flexibility, and computing platform portability essential for railway prognostic applications.This study addresses these limitations by implementing a physics-informed neural network (PINN) framework, i.e. PhysicsNeMo, as a computational instrument for 3D wheel-rail contact analysis. The PhysicsNeMo-based platform integrates classical Hertzian contact theory with neural network capabilities, enabling accurate prediction of stress and displacement fields critical for damage accumulation assessment. The open-source framework provides complete customisation, collaborative development, and cost-effective deployment across diverse computing environments from desktop to high-performance computing clusters.Validation demonstrates appreciable accuracy in predicting contact mechanics parameters essential for prognostic health management. The framework provides railway maintenance practitioners with detailed visualisation of stress distributions and displacement fields, enabling identification of fault root causes and damage propagation mechanisms. Results establish a foundation for intelligent predictive maintenance strategies, supporting the railway industry's transition toward physics-informed prognostics for improved asset health management and operational reliability.

Place, publisher, year, edition, pages
Springer Nature, 2025
Series
Lecture Notes in Intelligent Transportation and Infrastructure, ISSN 2523-3440, E-ISSN 2523-3459
Keywords
railway prognostics, physics-informed neural networks, wheel-rail contact, open-source physics-based simulation, damage accumulation, scalable multi-GPU platform
National Category
Reliability and Maintenance
Research subject
Operation and Maintenance Engineering
Identifiers
urn:nbn:se:ltu:diva-115094 (URN)
Conference
16th International Conference TRANSBALTICA 2025: Transportation Science and Technology, Vilnius, Lithuania, September 18–19, 2025
Funder
Luleå Railway Research Centre (JVTC)Swedish Transport AdministrationEU, Horizon Europe, Academics4Rail, project No.101121842
Available from: 2025-10-13 Created: 2025-10-13 Last updated: 2025-11-24Bibliographically approved
Masarira, M., Papadopoulou, K. A., Rahbarimanesh, A., Sinha, J. K. & Kumar, U. (2024). A framework for analysis of stakeholder dynamics and value creation in industrial maintenance projects: the stakeholder ipot. International Journal of Systems Assurance Engineering and Management, 15, 4229-4251
Open this publication in new window or tab >>A framework for analysis of stakeholder dynamics and value creation in industrial maintenance projects: the stakeholder ipot
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2024 (English)In: International Journal of Systems Assurance Engineering and Management, ISSN 0975-6809, E-ISSN 0976-4348, Vol. 15, p. 4229-4251Article in journal (Refereed) Published
Abstract [en]

This paper proposes a methodological approach that can be applied in practice for evaluating stakeholder dynamics and assessing projects against appropriate value propositions within an industrial maintenance project context. A conceptual framework is proposed and is demonstrated through a case analysis. It is expected that the proposed methodology, the Stakeholder Interdependent Performance Opportunities and Threats, (Stakeholder iPOT), can advance project management practice by offering a mechanism for analysing stakeholder expectations and responses to the opportunities and threats that different project events present. This study highlights the need for continued investigation not only within the context of industrial maintenance projects but also in other sectors to improve our understanding and ability to effectively manage stakeholder dynamics.

Place, publisher, year, edition, pages
Springer Nature, 2024
Keywords
Industrial projects, Risk assessment, Stakeholder dynamics, Stakeholder iPOT, Value creation
National Category
Construction Management Business Administration Other Civil Engineering
Research subject
Operation and Maintenance Engineering
Identifiers
urn:nbn:se:ltu:diva-108525 (URN)10.1007/s13198-024-02405-9 (DOI)001285251600001 ()2-s2.0-85200571747 (Scopus ID)
Note

Validerad;2024;Nivå 1;2024-10-11 (joosat);

Full text license: CC BY

Available from: 2024-08-12 Created: 2024-08-12 Last updated: 2025-10-21Bibliographically approved
Jena, J. K., Verma, A. K., Kumar, U. & Ajit, S. (2024). A Statistical Approach to Estimate Severe Accident Vehicle Collision Probability Inside a Multi-lane Road Tunnel with Unidirectional Traffic Flow. In: P. K. Kapur; Hoang Pham; Gurinder Singh; Vivek Kumar (Ed.), Reliability Engineering for Industrial Processes: (pp. 381-397). Springer Nature, Part F2569
Open this publication in new window or tab >>A Statistical Approach to Estimate Severe Accident Vehicle Collision Probability Inside a Multi-lane Road Tunnel with Unidirectional Traffic Flow
2024 (English)In: Reliability Engineering for Industrial Processes / [ed] P. K. Kapur; Hoang Pham; Gurinder Singh; Vivek Kumar, Springer Nature, 2024, Vol. Part F2569, p. 381-397Chapter in book (Other academic)
Place, publisher, year, edition, pages
Springer Nature, 2024
Series
Springer Series in Reliability Engingeering, ISSN 1614-7839, E-ISSN 2196-999X
National Category
Vehicle and Aerospace Engineering Probability Theory and Statistics Transport Systems and Logistics
Research subject
Operation and Maintenance Engineering
Identifiers
urn:nbn:se:ltu:diva-105439 (URN)10.1007/978-3-031-55048-5_23 (DOI)2-s2.0-85191750532 (Scopus ID)
Note

ISBN for host publication: 978-3-031-55048-5; 

Available from: 2024-05-13 Created: 2024-05-13 Last updated: 2025-11-20Bibliographically approved
Kasraei, A., Garmabaki, A. H., Odelius, J., Famurewa, S. M. & Kumar, U. (2024). Climate Zone Reliability Analysis of Railway Assets. In: International Congress and Workshop on Industrial AI and eMaintenance 2023: . Paper presented at 7th International Congress and Workshop on Industrial AI and eMaintenance, IAI 2023, Luleå, Sweden, June 13-15, 2023 (pp. 221-235). Springer Science and Business Media Deutschland GmbH
Open this publication in new window or tab >>Climate Zone Reliability Analysis of Railway Assets
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2024 (English)In: International Congress and Workshop on Industrial AI and eMaintenance 2023, Springer Science and Business Media Deutschland GmbH , 2024, p. 221-235Conference paper, Published paper (Other academic)
Place, publisher, year, edition, pages
Springer Science and Business Media Deutschland GmbH, 2024
Series
Lecture Notes in Mechanical Engineering, ISSN 2195-4356, E-ISSN 2195-4364
National Category
Infrastructure Engineering Reliability and Maintenance
Research subject
Operation and Maintenance Engineering
Identifiers
urn:nbn:se:ltu:diva-103882 (URN)10.1007/978-3-031-39619-9_16 (DOI)2-s2.0-85181981181 (Scopus ID)
Conference
7th International Congress and Workshop on Industrial AI and eMaintenance, IAI 2023, Luleå, Sweden, June 13-15, 2023
Funder
VinnovaThe Kempe Foundations
Available from: 2024-01-23 Created: 2024-01-23 Last updated: 2025-10-21Bibliographically approved
Galar, D. & Kumar, U. (2024). Digital Twins: Definition, Implementation and Applications. In: Prabhakar V. Varde; Manoj Kumar; Mayank Agarwal (Ed.), Advances in Risk-Informed Technologies: Keynote Volume (ICRESH 2024) (pp. 79-106). Springer Nature
Open this publication in new window or tab >>Digital Twins: Definition, Implementation and Applications
2024 (English)In: Advances in Risk-Informed Technologies: Keynote Volume (ICRESH 2024) / [ed] Prabhakar V. Varde; Manoj Kumar; Mayank Agarwal, Springer Nature, 2024, p. 79-106Chapter in book (Other academic)
Abstract [en]

The digital technologies accompanying Industry 4.0 have ushered in a new era in the management of industrial economic systems. The concept of the digital twin is at the heart of this transformation. Stemming from the convergence of advanced data analytics, Internet of Things (IoT) technologies, and virtual modelling and domain knowledge, digital twins were conceptualized to create virtual replicas of physical assets and systems. 

Place, publisher, year, edition, pages
Springer Nature, 2024
Series
Risk, Reliability and Safety Engineering, ISSN 2731-7811, E-ISSN 2731-782X
National Category
Information Systems
Research subject
Operation and Maintenance Engineering
Identifiers
urn:nbn:se:ltu:diva-108679 (URN)10.1007/978-981-99-9122-8_7 (DOI)
Note

ISBN for host publication: 978-981-99-9121-1, 978-981-99-9124-2, 978-981-99-9122-8

Available from: 2024-08-21 Created: 2024-08-21 Last updated: 2025-10-21Bibliographically approved
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Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0001-8111-6918

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