Dr Keith Tarnowski
MEng, CEng, PhD
Department of Mechanical Engineering,
RC02e Mappin Mining Block,
Tel: +44 (0)114 222 7721
I am a lecturer in the Design, Manufacturing & Management group in the Department of Mechanical Engineering and a Chartered Mechanical Engineer. I obtained my first degree in Mechanical Engineering from the University of Sheffield, graduating in 2004, before working for Atkins Engineering Consultants for 8 years on a variety of projects which incorporated structural integrity, design and finite element analysis. I subsequently returned to academia to undertake a PhD in fracture mechanics at Imperial College London which I completed in 2016. I was awarded an EPSRC Doctor Prize Fellowship at the University of Sheffield in the same year.
During my time in industry I worked as a lead engineer and project manager responsible for a wide variety of projects including: finite element analysis of nuclear submarine impacts using DYNA; design, manufacture and installation of linear friction welding tooling for aerospace gas turbines; fatigue and damage tolerance assessments of civil aircraft using NASTRAN and PATRAN; probabilistic fatigue crack growth and fracture assessment of wind turbine structures to BS 7910; development of an Incredibility of Failure safety justification for nuclear pressure vessel components including ASME III design assessments and R6 failure analyses.
I am module leader for Machine Element Design and Failure Analysis (AMR333) and Finite Element Analysis of Machines (AMR338). Both of these 20 credit, Level 3 modules are taught at the AMRC Training Centre as part of a degree apprenticeship course. I am also module leader for Engineering Techniques and Manufacturing Technology (MEC130). This is a 10 credit, Level 1 module on the Mechanical Engineering undergraduate course.
My research focuses on fracture mechanics aspects of structural integrity, encompassing crack growth mechanisms such as fatigue and creep, as well as brittle and ductile fracture. My research combines experimental techniques with numerical modelling and I have experience of a wide variety of finite element analysis software packages including, ABAQUS, DYNA, NASTAN and PATRAN.
I have developed improved methods of accurately measuring crack initiation and growth in ductile materials and in hostile environments. These methods, based on the electrical potential drop technique, facilitate improved material models that enable the continued safe operation of cracked structures and avoid the premature introduction of unnecessary inspection and maintenance programmes. This provides potentially huge social, environmental and economic benefits to variety of industries, e.g. power generation. As part of an ASTM task group I am revising the standards on fracture toughness testing (E1820) and creep crack growth testing (E1457) to incorporate this research.
- EPSRC Doctoral Prize Fellowship, 2016-17, £53k (PI)
- Tarnowski KM, Nikbin KM, Dean DW & Davies CM (2018) A Unified Potential Drop Calibration Function for Common Crack Growth Specimens. Experimental Mechanics. View this article in WRRO
- Tarnowski KM, Nikbin KM, Dean DW & Davies CM (2017) Improvements in the Measurement of Creep Crack Initiation and Growth Using Potential Drop. International Journal of Solids and Structures. View this article in WRRO
- Tarnowski K, Dean DW, Nikbin KM & Davies CM (2017) Predicting the influence of strain on crack length measurements performed using the potential drop method. Engineering Fracture Mechanics, 182, 635-657. View this article in WRRO
- Tarnowski K, Davies CM, Dean DW & Nikbin KM (2015) The Influence of Plasticity on Crack Length Measurements Using the Potential Drop Technique In Kang J, Jablonski D & Dudzinski D (Ed.), Evaluation of Existing and New Sensor Technologies for Fatigue, Fracture and Mechanical Testing (pp. 73-96). View this article in WRRO
Conference proceedings papers
- Tarnowski K, Davies CM, Dean DW & Nikbin KM (2017) Re-Evaluation of the Potential Drop Technique for Measuring Creep Crack Initiation and Growth. Transactions, SMiRT 23, 10 August 2015 - 14 August 2015. View this article in WRRO
- Tarnowski KM, Davies CM, Nikbin KM & Dean DW (2017) Experimental determination of elastic and plastic LLD rates during creep crack growth testing. American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP, Vol. 6A-2017 View this article in WRRO
- Tarnowski K, Davies CM, Nikbin KM & Dean DW (2015) The Influence of Creep Strain on Crack Length Measurements Using the Potential Drop. ASME 2015 Pressure Vessels and Piping Conference, Vol. 6A: Materials and Fabrication, 19 July 2015 - 23 July 2015. View this article in WRRO
- Tarnowski K, Davies CM, Webster GA & Dean DW (2013) Predictions of Creep Crack Initiation Periods in Pre-Compressed 316H Stainless Steel. ASME 2013 Pressure Vessels and Piping Conference, Vol. Volume 6A: Materials and Fabrication, 14 July 2013 - 18 July 2013. View this article in WRRO