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Dr Carol Johnston CEng MWeldI

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Back to Who We Are Alan Taylor Dr Channa Nageswaran Dr Carol Johnston CEng MWeldI
 

Dr Carol Johnston gained her degree and PhD in Materials Science from Cambridge University. She joined the Fatigue Section at TWI in 2009, developing her knowledge of resonance testing from Graham Slater and gradually taking over the leadership of the TWI’s resonance testing business stream. In addition to her expertise in the fatigue performance of girth welds, mechanically lined pipe and subsea connectors, and resonance fatigue testing, Carol has run projects on many other topics related to the structural integrity and fatigue performance of welds and bolted connections.

In all, Carol has managed over 150 projects since 2010, which were mainly for individual clients but included core research projects (CRP) and joint industry projects (JIP). Carol launched TWI’s first JIP on mechanically lined pipe (MLP) in 2011, which was followed by two other JIPs on MLP. Topics of current JIPs include investigating the suitability of electron beam welding for the offshore wind industry, and working jointly with DNV to unify the recommendations in the key fatigue design documents.

As Technology Fellow for Large Scale Testing, Carol is the focal point for TWI’s large scale testing offering; tests that generate data to provide an understanding of the performance of components, as opposed to tests on specimens that have been extracted from a component and machined to dimensions prescribed in a test standard. These test methods include resonance fatigue testing (currently applied to full scale girth welds, mechanically lined pipes and subsea connectors) and full scale bend testing of pipes. In addition, TWI can offer fatigue testing of full scale mooring chain in seawater, full scale pipes containing a sour environment, and more.

In addition to working directly with TWI Members, Carol promotes the progression of research in engineering by assisting with various conferences and other organisations. She has been a topic organiser at the ASME OMAE conference since 2016, where she is a regular session chair. She is also organising the ‘codes and standards’ topic at the 2026 Engineering Integrity Society (EIS) conference.

Connect with Carol on LinkedIn

TWI Publications

  1. L Wei, C Johnston and M Gallegillo, 2010: ‘Fabrication Technologies, Residual Stresses and  Structural Integrity in Clad Components’ TWI Member Report 970/2010
  2. Maddox S J and Johnston C F, 2011: ‘Review of Fatigue Results from Girth Welds in Risers’  TWI Member Report 1006/2011
  3. Maddox S J and Johnston C, ‘Confirming the Validity of the BS7608 Fatigue Design Curves’  TWI Member Report 1100/2018
  4. Johnston C, 2021: ‘Fatigue Strength of Large Bolts: Results of Tests in Air and Artificial  Seawater Spray’ TWI Member Report 1155/2021
  5. Johnston C, 2022: ‘Investigating the Influence of Pre-tension on Fatigue Performance of  Large Bolts’ TWI Member Report 1158/2022
  6. Johnston C, 2023: ‘Industry Guidelines on the Fatigue Performance of Large Bolts’ TWI  Member Report 1173/2023
  7. Carol Johnston, 2023: ‘Cracking in Welded Aluminium Structures – How and Why it Differs  from Steel’ Welding and Joining Matters, Issue 4, March 2023
  8. Carol Johnston, Emre Akgun and Eduardo Hippert, 2024: ‘Fatigue Performance of Carbon  Steels in the Presence of Corrosion Pits’ TWI Member Report 1185/2024

External Publications

https://orcid.org/0000-0002-9123-9169

  1. J V Sharp, J B Wintle, C Johnston, A Stacey: ‘Industry Practices for the Management of  Ageing Assets Relevant to Offshore Installations’ OMAE2011-49264, 30th International  Conference on Ocean, Offshore and Arctic Engineering 19-24 June 2011
  2. S J Maddox, C Johnston: ‘Factors Affecting the Fatigue Strength of Girth Welds: An Evaluation of TWI’s Resonance Fatigue Test Database’ c 30th International Conference on Ocean, Offshore and Arctic Engineering 19-24 June 2011
  3. J Wintle, C Johnston, J Miles and B McGrath: ‘Management of Ageing: A Framework for Nuclear Chemical Facilities’, HSE research report RR912, 2012
  4. C Johnston, C Nageswaran and T London: ‘Investigations into the Fatigue Strength of CRA Lined Pipe’ OTC 27141-MS, Offshore Technology Conference, Houston Texas 2-5 May 2016
  5. C Johnston: ‘Full Scale Fatigue Testing using the Resonance Method (Job Knowledge article)’ Welding World Magazine, October 2016 Edition
  6. C Johnston: ‘Statistical Analysis of Fatigue Test Data’ ASME 2017 36th International  Conference on Ocean, Offshore and Arctic Engineering, June 25–30, 2017, Trondheim,  Norway OMAE2017-62212
  7. Yoshinori Ando, Yosuke Oku, Masaaki Sugino, Carol Johnston: ‘Evaluation of Fatigue Performance of the Premium Threaded Connection with Different Mean Stress Levels’ OMAE2017-62418
  8. Siak Manteghi, Dave Gibson, Carol Johnston: ‘Fatigue Performance of Friction Welds Manufactured both in Air and Underwater’ OMAE2017-62495
  9. Mohd Fairuz Shamsudin, Cristinel Mares, Carol Johnston, Graham Edwards and Tat-hean Gan: ‘Vibration and acoustic emission monitoring of a girth weld during a resonance fatigue test’ 24th international congress on sound and vibration, 23-27 July 2017, London
  10. Carol Johnston, Jenny Crump: ‘Review of the In-air Fatigue Behaviour or CRA Clad and Lined  Pipe’ ASME 2019 38th International Conference on Ocean, Offshore and Arctic Engineering, June 9–14, 2019, Glasgow, Scotland, UKOMAE2019-96233
  11. Gabriel Rombado, David A. Baker, Lars M. Haldorsen, Kenneth Macdonald, Heath Walker, Chris Caldwell, Binyan He, Carol Johnston: ‘Fatigue Performance of Thick Section Titanium Grade 29 Girth Welds’ Proc. ASME. OMAE2020, Volume 3: Materials Technology, V003T03A013, August 3–7, 2020 Paper No: OMAE2020-18071
  12. Rombado, G.; Baker, D.A.; Haldorsen, L.M.; Macdonald, K.; Walker, H.; Caldwell, C.; He,  B.; Johnston, C., 2020: ‘Fatigue Performance of Thick Section Titanium Grade 29 Girth  Welds’ Proceedings of the International Conference on Offshore Mechanics and Arctic  Engineering – OMAE 2020 DOI: 10.1115/OMAE2020-18071 EID: 2-s2.0-851091745172
  13. Gowtham Soundarapandiyan, Carol Johnston, Raja Khan, Bo Chen, Michael Fitzpatrick: ‘A Technical Review of the Challenges in Powder Recycling in the Laser Powder Bed Fusion Additive Manufacturing Process’ The Journal of Engineering, Jan 2021
  14.  Gowtham Soundarapandiyan, Raja Khan, Carol Johnston, Bo Chen, Michael Fitzpatrick: ‘Effect of Post-processing Thermal Treatments on Electron-beam Powder Bed–fused Ti6Al4V’ First published: 26 February 2020, Material Design and Processing Communications, Volume 3, Issue 3, June 2021
  15. Carol Johnston, Matthew Dore: ‘Comparison of the Fatigue Performance of Galvanised M72  Bolts with Design Standard Recommendations’ OMAE2021- 62758, Proceedings of the ASME  2021 40th International Conference on Ocean, Offshore and Arctic Engineering OMAE2021 June 21-30, 2021, Virtual, Online
  16. Gowtham Soundarapandiyana, Carol Johnston, Raja H. U. Khan, Chu Lun Alex Leung, Peter  D. Lee, Everth Hernández-Nava, Bo Chen, Michael E. Fitzpatrick: ‘The Effects of Powder  Reuse on the Mechanical Response of Electron Beam Additively Manufactured Ti6Al4V Parts’ Additive Manufacturing Volume 46, October 2021, 102101
  17. Carol Johnston, Tyler London: ‘Development of a Stress Intensity Factor Solution for Mechanically Lined Pipe’ OMAE2022-78559 Proceedings of the ASME 2022 4 1st International Conference on Ocean, Offshore and Arctic Engineering  OMAE2022 June 5-10, 2022, Hamburg, Germany
  18. Carol Johnston: ‘Fatigue Performance of Longitudinal Seam Welds made by Rapidweld Electron Beam Welding for use in Monopiles’ Paper and poster reference P068, WindEurope Annual Event 2022, Bilbao, 5-7 April 2022
  19. Carol Johnston: ‘Effect of Low Pretension on the Fatigue Performance of Large Bolts’ OMAE2022-78556 Proceedings of the ASME 202 2 4 1st International Conference on Ocean, Offshore and Arctic Engineering OMAE2022 June 5-10, 2022, Hamburg, Germany
  20. Glienke, R., Schwarz, M., Johnston, C., Meyer, M. und Seidel, M.: ‘Update on the Fatigue  Strength of Large-size Bolt-assemblies in Steel Constructions under Consideration of  Manufacturing and Surface Condition Related Impacts’ International Journal of Offshore and  Polar Engineering (IJOPE) Vol. 33, No. 1, March 2023, pp. 81–89
  21. Gowtham Soundarapandiyan, Chu Lun Alex Leung, Carol Johnston, Bo Chen, Raja H.U.  Khan, Phil McNutt, Alisha Bhatt, Robert C. Atwood, Peter D. Lee, Michael E. Fitzpatrick: ‘In-situ Monitoring the Effects of Ti6Al4V Powder Oxidation during Laser Powder Bed Fusion Additive Manufacturing’ International Journal of Machine Tools and Manufacture, 104049 2023
  22.  Carol Johnston, Emre Akgun, Eduardo Hippert: ‘Fatigue Performance of Carbon Steels in the Presence of Corrosion Pits’ International Journal of Pressure Vessels and Piping, Submitted 2023
  23. Carol Johnston: ‘Fatigue Performance of Modern Submerged Arc Welds in 85mm  Grade S355 Steel’ Fatigue 2024, 9th Engineering Integrity Society International  Conference on Durability and Fatigue, 19-21 June 2024, Jesus College, Cambridge, UK
  24. Agnes Marie Horn, Carol Johnston: ‘Fatigue Performance of Riser Quality Girth Welds:  Fracture Mechanics Study of the Slope Transition Point using DNV’s Girth Weld Database’  OMAE2024-127315 Proceedings of the ASME 2024 43nd International Conference on  Ocean, Offshore and Arctic Engineering OMAE2024 June 9-14, 2024, Singapore EXPO,  Singapore
  25. Carol Johnston, Agnes Marie Horn: ‘Fatigue Performance of Riser Quality Girth Welds:  Analysis of TWI and DNV's Databases’ Fatigue Fract Eng Mater Struct. 2024;1–11
  26. Carol Johnston: ‘Fatigue Performance of Modern SAW in 85mm Grade S355 Steel’ Fatigue 2024 Conference, Cambridge, 19-21 June 2024 

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