Browsing Research publications by Author "Lewis, Andrew"

Now showing items 1-14 of 14

    • Approximations to limit cycles for a nonlinear multi-degree-of-freedom system with a cubic nonlinearity through combining the harmonic balance method with perturbation techniques 

      Lewis, Andrew (2020-11)
      This paper presents an approach to obtaining higher order approximations to limit cycles of an autonomous multi-degree-of-freedom system with a single cubic nonlinearity based on a first approximation involving first and ...

    • Effect of Electromagnetic Treatment on Fatigue Resistance of 2011 Aluminium Alloy 

      Lewis, Andrew; Mohin, Muhodin; Toofanny, Hasif; Babutskyi, Anatolii; Xu, Yigeng (2016-08-08)
      Beneficial effects of the electromagnetic treatment on fatigue resistance were reported on several engineering alloys. These could be linked to the dislocation activity and the rearrangement of the crystal structure of the ...

    • Effect of electropulsing on the fatigue resistance of aluminium alloy 2014-T6 

      Babutskyi, Anatolii; Mohin, Ma; Chrysanthou, Andreas; Xu, Yigeng; Lewis, Andrew (2020-01-20)
      The effects of electropulsing on the fatigue resistance of aluminium alloy 2014-T6 were studied in relation to electric current amplitude, pulse duration, and number of repetitions. Utilising the Taguchi method, the present ...

    • Effect of Plastic Deformation on Compliance Curve Based Crack Closure Measurement 

      Lewis, Andrew; Mohin, Muhodin; Chrysanthou, Andreas; Xu, Yigeng (2016-09-01)
      Fatigue crack growth depends heavily on near tip stress-strain behavior controlled by many micromechanical and microstructural factors. Crack closure is widely used to rationalize crack growth behaviour under complex loading ...

    • Fluid–Structure Interaction of Symmetrical and Cambered Spring-Mounted Wings Using Various Spring Preloads and Pivot Point Locations 

      Lewis, Andrew; Knight, Jason; Haritos, George; Beazley, Benjamin; Fels, Simon (2021-08-27)
      The fluid–structure interaction of a pivoting rigid wing connected to a spring and subjected to freestream airflow in a wind tunnel is presented. Fluid–structure interactions can, on the one hand, lead to undesirable ...

    • In-Service Performance of Emergency Shutdown Valves and Dependent Operational Relationships in the Offshore Oil and Gas Industry 

      Cameron, Keith; Lewis, Andrew; Montalvão, Diogo; Herfatmanesh, Mohammad Reza (2023-12-21)
      Industrial process plants use emergency shutdown valves (ESDVs) as safety barriers to protect against hazardous events, bringing the plant to a safe state when potential danger is detected. These ESDVs are used extensively ...

    • An investigation of stability of a control surface with structural nonlinearities in supersonic flow using Zubov's method 

      Lewis, Andrew (2009-08-07)
      It is well known that the presence of nonlinearities may significantly affect the aeroelastic response of an aerospace vehicle structure. In this paper, the aeroelastic behaviour at high Mach numbers of an all-moving control ...

    • A methodology using health and usage monitoring system data for payload life prediction 

      Lewis, Andrew; Nalliah, Philip; Lomax, Colin; Hawkins, Chris (KU Leuven, 2018-09-17)
      This paper presents a methodology to monitor the fatigue life of aerospace structures and hence the remaining allowable fatigue life. In fatigue clearance, conservative load assumptions are made. However, in reality, a ...

    • Numerical and Experimental Investigation on Single-Point Thermal Contact Resistance 

      Wang, Anliang; Liu, Zhenyu; Wu, Hongwei; Lewis, Andrew; Loulou, Tahar (Springer Nature, 2021-06-02)
      In the engineering applications, the thermal contact resistance has an important effect of heat transfer design and operation of systems and devices. For general contact heat transfer, as long as the geometry, mechanics ...

    • A PERSPECTIVE ON STRUCTURAL HEALTH AND USAGE MONITORING IN AEROSPACE APPLICATIONS 

      Lewis, Andrew (2019-05-08)
      There is great interest in the benefits of Structural Health and Usage Monitoring in the Aerospace Industry both from a safety point of view and because of the possibility of extending the life of aerospace structural ...

    • Proceedings of Abstracts, School of Physics, Engineering and Computer Science Research Conference 2022 

      Amafabia, Daerefa-a; Asimea, Laurel; Bally, John; Baran, Anthony; Boies, Adam; Borjali, Amirhossein; Bosomworth, Chloe; Burningham, Ben; Chaliasou, Napoleana-Anna; CHEN, Yong Kang; Cheong, Yuen Ki; Chizari, Mahmoud; Chung, Etelka; Coppin, Kristen; David-West, Opukuro; Dennler, Nik; Dhakal, Hom; Dimov, Nikolay; Dmitruk, Emil; Donald, Allen; Drix, Damien; Dzib, Sergio A.; Eltaweel, Mahmoud; Fadlelseed, Sajid; Farahani, Atena; Felix, Adrian; Foat, Tim; Forbrich, Jan; Franco, Maximilien; Gaarn, Joesphine; Garratt, Tracy; Geach, Jim; Ghias, Narges; Ghita, Adrian; Giannetti, Niccolo; Vargas-Gonzalez, Jaime; Greenaway, Richard; Haritos, George; Hatami, Sara; Haydock, David; Helian, Na; Herfatmanesh, Mohammad Reza; Herve, Jean-Baptiste; Hesse, Evelyn; Korani, Hossein; Hosseini, Vahid; Hu, Wei; Hubbard, Thomas; Inal, Jameel; Irigo, Patrick; Ismail, Sikiru O.; Jepleting, Fiona; Ji, Wei; Johnston, Ian; Jombo, Gbanaibolou; Kadir, Shabnam; Kalyvas, Christos; Kamran, Syed Muhammad; Kanellopoulos, Antonios; Kiflay, Aklil Zenebe; Kirner, Raimund; Knox, Kerry; Kobayashi, Chiaki; Kumar, Dhirendra; Kumar, Ritesh; Lane, Peter; Lekkala, Himayasri; Lewis, Andrew; Li, Liang; Luo, Qi; Madani, Hossein; Mallet, Colin; Maruthupandian, Surya; Mathen, Elizabeth Reeja; Matousek, Pavel; McCool, Simon; McGarry, James C.; Menon, Catherine; Metzner, Christoph; Miles, Rachael E. H.; Moeinnia, Hadi; Moggridge, Paul; Mohseni, Mahdi; Montalvão, Diogo; Moraby, Mohammad Najeeb; Murnane, Darragh; Norgate, Marc; Nourani, Amir; Prasad, Kumar Shantanu; Ramalingam, Soodamani; Rastogi, Shavika; Reid, Jonathan P.; Ren, Guogang; Rivilla, Victor M.; Saidpour, Hossein; Saito, Kiyoshi; Sajedi, Seyed Amir Hossein; Salge, Christoph; Samararatne, Samadhi; Schmuker, Michael; Sensoy, Elif; Shriram, Ajay; Singh, Harpreet; Sorouraddin, Yasser; Steuber, Volker; Stone, Nicholas; Sun, Yi; Sureddi, Roopesh; Sutton, Samuel; Thomas, Peter; Timms, Andrew R; Tiwari, P. R.; Tsokanos, Athanasios; Vadalia, Mansukhlal; Yaqoob, Muhammad; Yulianto, Muhamad; Zheng, Minghua (University of Hertfordshire, 2022-11-04)
      The present proceedings record the abstracts submitted and accepted for presentation at SPECS 2022, the second edition of the School of Physics, Engineering and Computer Science Research Conference that took place online, ...

    • Refined Analytical Approximations to Limit Cycles for Non-Linear Multi-Degree-of-Freedom Systems 

      Lewis, Andrew (2019-04-01)
      This paper presents analytical higher order approximations to limit cycles of an autonomous multi-degree-of-freedom system based on an integro-differential equation method for obtaining periodic solutions to nonlinear ...

    • Three-Dimensional Modelling and Simulation of the Ice Accretion Process on Aircraft Wings 

      Chang, S; Tang, H; Wu, Hongwei; Su, X; Lewis, Andrew; Ji, Chaoyue (2018-11-28)
      In this article, a new computational method for the three-dimensional (3D) ice accretion analysis on an aircraft wing is formulated and validated. The two-phase flow field is calculated based on Eulerian-Eulerian approach ...

    • The Use of Pseudo-Inverse Methods in Reconstructing Loads on a Missile Structure 

      Vishwakarma, R.; Turner, Denis; Lewis, Andrew; Chen, Yong; Xu, Yigeng (2012)
      A missile during air carriage is subjected to high vibratory forces. These forces consequently impose high levels of stress on the attachment points to the aircraft. A repetitive application of stress causes fatigue. ...