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Structural and residual strength analysis of metal-to-metal adhesively bonded joints. (2019)
Thesis
PRATHURU, A. 2019. Structural and residual strength analysis of metal-to-metal adhesively bonded joints. Robert Gordon University [online], PhD thesis. Available from: https://openair.rgu.ac.uk

The aim of this study is to propose a new simulation/experimental methodology to assess the residual strength of defective adhesive bonds. This incorporates defect detection in adhesive bonds and quantification of the effect of these defects on the a... Read More about Structural and residual strength analysis of metal-to-metal adhesively bonded joints..

Optimization of indentification of particle impacts using acoustic emission. (2018)
Thesis
HEDAYETULLAH, A.M. 2018. Optimization of indentification of particle impacts using acoustic emission. Robert Gordon University, PhD thesis.

Air-borne or liquid-laden solid particle transport is a common phenomenon in various industrial applications. Solid particles transported at severe operating conditions such as high-flow velocity can cause concerns for structural integrity, through w... Read More about Optimization of indentification of particle impacts using acoustic emission..

Flow noise identification using acoustic emission (AE) energy decomposition for sand monitoring in flow pipeline. (2017)
Journal Article
DROUBI, M.G., REUBEN, R.L. and STEEL, J.I. 2018. Flow noise identification using acoustic emission (AE) energy decomposition for sand monitoring in flow pipeline. Applied acoustics [online], 131, pages 5-15. Available from: https://doi.org/10.1016/j.apacoust.2017.10.016

In pipelines used for petroleum production and transportation, sand particles may be present in the multi-phase flow of oil and gas and water. The Acoustic Emission (AE) measurement technique is used in the field of sand monitoring and detection in t... Read More about Flow noise identification using acoustic emission (AE) energy decomposition for sand monitoring in flow pipeline..

Acoustic emission method for defect detection and identification in carbon steel welded joints. (2017)
Journal Article
DROUBI, M.G., FAISAL, N.H., ORR, F., STEEL, J.A. and EL-SHAIB, M. 2017. Acoustic emission method for defect detection and identification in carbon steel welded joints. Journal of constructional steel research [online], 134, pages 28-37. Available from: https://doi.org/10.1016/j.jcsr.2017.03.012

Detecting welding defects in industrial equipment (welded joints and built-up structures) is a key aspect in evaluating the probability of failure in different situations. Acoustic emission (AE) is an effective non-destructive detecting technique, an... Read More about Acoustic emission method for defect detection and identification in carbon steel welded joints..

Stress analysis at the interface of metal-to-metal adhesively bonded joints subjected to 4-point bending: finite element method. (2016)
Journal Article
PRATHURU, A.K., FAISAL, N.H., JIHAN, S., STEEL, J.A. and NJUGUNA, J. 2017. Stress analysis at the interface of metal-to-metal adhesively bonded joints subjected to 4-point bending: finite element method. Journal of adhesion [online], 93(11), pages 855-878. Available from: https://doi.org/10.1080/00218464.2016.1172309

This paper presents a study of stress states in two-dimensional models of metal-to-metal adhesively bonded joints subjected to 4-point flexural loading using finite element (FE) method. The FE simulations were carried out on adhesive bonded joints of... Read More about Stress analysis at the interface of metal-to-metal adhesively bonded joints subjected to 4-point bending: finite element method..

A resilience engineering approach to safety excellence in the maintenance of oil and gas assets. (2016)
Thesis
AMEZIANE, S. 2016. A resilience engineering approach to safety excellence in the maintenance of oil and gas assets. Robert Gordon University, PhD thesis.

The established approach to safety management has failed to handle socio-technical systems that have become more complex. The main argument is this approach is based on assumptions that systems are protected against accidents by barriers (well-traine... Read More about A resilience engineering approach to safety excellence in the maintenance of oil and gas assets..

A novel method of producing microbubbles for targeted drug delivery. (2016)
Thesis
FIABANE, J. 2016. A novel method of producing microbubbles for targeted drug delivery. Robert Gordon University, PhD thesis.

Microbubbles, currently employed in diagnostic ultrasound as a contrast agent, have a potential new application as vehicles for targeted drug delivery, which could revolutionise medicine by eliminating side-effects. A new device is developed which ou... Read More about A novel method of producing microbubbles for targeted drug delivery..

A prognostic decision model for offshore wind turbines maintenance. (2015)
Journal Article
SINHA, Y. and STEEL, J.A. 2015. A prognostic decision model for offshore wind turbines maintenance. Wind engineering [online], 39(5), pages 569-578. Available from: https://doi.org/10.1260/0309-524X.39.5.569

Frequent unscheduled random maintenance activities have significantly increased the operating cost of Offshore Wind Turbines (OWT). These activities account for ?65% of the overall OWT maintenance costs or 23% of the lifetime costs of OWT, equivalent... Read More about A prognostic decision model for offshore wind turbines maintenance..

Failure prognostic schemes and database design of a software tool for efficient management of wind turbine maintenance. (2015)
Journal Article
SINHA, Y. and STEEL, J.A. 2015. Failure prognostic schemes and database design of a software tool for efficient management of wind turbine maintenance. Wind engineering [online], 39(4), pages 453-477. Available from: https://doi.org/10.1260/0309-524X.39.4.453

Wind Turbines require numerous and varied types of maintenance activities throughout their lifespan, the frequency of which increases with years in operation. At present the proportion of maintenance cost to the total cost for wind turbines is signif... Read More about Failure prognostic schemes and database design of a software tool for efficient management of wind turbine maintenance..

Structure, strength and defect characterisation of cement based materials. (2014)
Thesis
CHOUDHURY, A.H. 2014. Structure, strength and defect characterisation of cement based materials. Robert Gordon University, PhD thesis.

In cement based systems, the residual stresses are created by internal expansion. This provides toughening by the release of the residual stresses as the macro-crack propagates. While circumstantial evidence of the residual stresses exist (e.g. micro... Read More about Structure, strength and defect characterisation of cement based materials..

A progressive study into offshore wind farm maintenance optimisation using risk based failure analysis. (2014)
Journal Article
SINHA, Y. and STEEL, J.A. 2015. A progressive study into offshore wind farm maintenance optimisation using risk based failure analysis. Renewable and sustainable energy reviews [online], 42, pages 735-742. Available from: https://doi.org/10.1016/j.rser.2014.10.087

Offshore Wind Farm consists of an array of Wind Turbines electrical, communication, command and control systems. At present the cost of maintaining Wind Turbines in the offshore locations is very high (about 35% of lifetime costs). This work puts emp... Read More about A progressive study into offshore wind farm maintenance optimisation using risk based failure analysis..

Significance of effective lubrication in mitigating system failures: a wind turbine gearbox case study. (2014)
Journal Article
SINHA, Y., STEEL, J.A., ANDRAWUS, J.A. and GIBSON, K. 2014. Significance of effective lubrication in mitigating system failures: a wind turbine gearbox case study. Wind engineering [online], 38(4), pages 441-449. Available from: https://doi.org/10.1260/0309-524x.38.4.441

The effectiveness of lubrication in machines mainly depends on the physical and chemical properties of lubricating oil, like quantity, level of suspended particles, effect of external load/shear forces, temperature amongst others. Periodic inspection... Read More about Significance of effective lubrication in mitigating system failures: a wind turbine gearbox case study..

An improved Vickers indentation fracture toughness model to assess the quality of thermally sprayed coatings. (2014)
Journal Article
FAISAL, N.H., AHMED, R., PRATHURU, A.K., SPENCE, S., HOSSAIN, M. and STEEL, J.A. 2014. An improved Vickers indentation fracture toughness model to assess the quality of thermally sprayed coatings. Engineering fracture mechanics [online], 128, pages 189-204. Available from: https://doi.org/10.1016/j.engfracmech.2014.07.015

This study presents an improved approach to the quality assessment of thermally sprayed coatings. Measurements were carried out on five different coatings. Since it is the overall extent of surface cracking during Vickers indentation that is indicati... Read More about An improved Vickers indentation fracture toughness model to assess the quality of thermally sprayed coatings..

A SMART software package for maintenace optimisation of offshore wind turbines. (2013)
Journal Article
SINHA, Y., STEEL, J.A., ANDRAWUS, J.A. and GIBSON, K. 2013. A SMART software package for maintenace optimisation of offshore wind turbines. Wind engineering [online], 37(6), pages 569-577. Available from: https://doi.org/10.1260/0309-524X.37.6.569

Offshore Wind Turbine (OWT) maintenance costs in between 20 - 35% of the lifetime power generation cost. Many techniques and tools that are being developed to curtail this cost are challenged by the stochastic climatic conditions of offshore location... Read More about A SMART software package for maintenace optimisation of offshore wind turbines..

Modeling multiphase solid transport velocity in long subsea tiebacks: numerical and experimental methods. (2013)
Thesis
BELLO, K.O. 2013. Modeling multiphase solid transport velocity in long subsea tiebacks: numerical and experimental methods. Robert Gordon University, PhD thesis.

Transportation of unprocessed multiphase reservoir fluids from deep/ultra-deep offshore through a long subsea tieback/pipeline is inevitable. This form of transportation is complex and requires accurate knowledge of critical transport velocity, flow... Read More about Modeling multiphase solid transport velocity in long subsea tiebacks: numerical and experimental methods..

A laboratory study of rail-wheel interaction monitoring using acoustic emission: effect of rolling conditions with and without lateral rattling. (2012)
Journal Article
THAKKAR, N.A., STEEL, J.A. and REUBEN, R.L. 2012. A laboratory study of rail-wheel interaction monitoring using acoustic emission: effect of rolling conditions with and without lateral rattling. Proceedings of the Institution of Mechanical Engineers, part F: journal of rail and rapid transit [online], 227(2), pages 161-175. Available from: https://doi.org/10.1177/0954409712458497

This paper presents part of an extended laboratory study on the potential to apply the acoustic emission (AE) technique for in-situ rail-wheel interaction monitoring using rail-mounted sensors. The essential monitoring principle is that the intensity... Read More about A laboratory study of rail-wheel interaction monitoring using acoustic emission: effect of rolling conditions with and without lateral rattling..


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