Professor Johann Sienz

Professor Johann Sienz

Johann Sienz

 

Deputy Head of College of Engineering

Director of Innovation and Engagement

Director of ASTUTE/ASTUTE 2020

Director of IMPACT

Overview

Specialist Subjects:

  • High Value Manufacturing including Additive Manufacture and Manufacturing Systems Engineering
  • Analysis and Optimization for Engineering Design
  • Simulation Driven Process Improvement

Find out more

Overview

Professor Johann Sienz received the Diplom-Ingenieur (FH) in Mechanical Engineering with specialisation in Aerospace Engineering from the University of Applied Sciences Augsburg, Germany, in 1989, the BEng (Hons) from the University of Central Lancashire, UK, in 1989, the MSc in 1990 and the Ph.D. in 1994, both from Swansea University, UK.

He holds a Personal Chair in the College of Engineering, Swansea University, where he is the Deputy Head of College and the Director of Innovation and Engagement.

He directs the £14.3 Mio ASTUTE 2020 (Advanced Sustainable Manufacturing Technologies; www.astutewales.com), part-funded Welsh Government, five year, four university partnership operation. This is a follow-on operation to the original £26.7 Mio pan-Wales, eight university partnership, five year ASTUTE project that brought together academics and manufacturing companies to collaboratively work on advanced topics in manufacturing in sectors such as aerospace, automotive and medical engineering. This project generated over £200 Mio economic impact for the region. He also directs the EPSRC part-funded, £2.2 Mio industrial doctoral training centre MATTER (Manufacturing Advances Through Training Engineering Researchers), in which future engineering leaders will carry out collaborative research work with industry and will graduate with a doctorate. All his projects involve extensive collaboration with industry in the face of a rapidly changing technology base.

He is a Fellow of the Institution of Mechanical Engineers (FIMechE) and of the Royal Aeronautical Society (FRAeS), and a Member of the Institute of Mathematics and its Applications (MIMA). He is a Chartered Engineer (CEng) and a Chartered Mathematician (CMath).
He is Editor-in-Chief of the International Journal “Applied Mathematical Modelling” as well as being on the editorial board of several other international journals.

Research

Professor Johann Sienz as Principal Investigator or a Co-Investigator has a total grant portfolio in excess of £50 Mio project value, obtaining over £30 Mio in funding from EPSRC, HEFCW and ERDF/ESF funding from the Welsh Government and approximately £20 Mio in-kind and match funding contributions from industry and partners. His main research area is the development and use of advanced computational techniques for structural simulation, process simulation and optimization.

  • Analysis and Optimization for Engineering Design
  • Simulation Driven Product and Process Improvement
  • High Value Manufacturing including Additive Manufacture and Manufacturing Systems Engineering

Major Research Projects

  • Co-Investigator   
    1997 – 2000: ‘Fully Integrated Design Optimization For Engineering Structures’, EPSRC GR/L41516/01, £250k.
  • Co-Investigator                 
    1999 – 2002: ‘Advanced Injection Moulding Technologies for Plastics, Simulation and Validation’, EPSRC GR/M39510, £350k.
  • Principal Investigator      
    2000-2004: ‘Computer Aided Optimisation of Extrusion Die Design’, EPSRC GR/M 95820, £300k.
  • Principal Investigator      
    2006 – 2008: ‘Development of 3D simulation of water assisted injection moulding of polymers guided and validated by experimentation using an instrumented process’, EPSRC EP/D039002/1, £ 448k.
  • Principal Investigator      
    2009 – 2011: ‘Rapid Temperature Cycling Injection Moulding; development and applications’, A4B (WAG), £300k.
  • Principal Investigator
    2008 – 2009:  ‘Composite Wing Bonded Repair: Phase 1’, £ 141k, Airbus.
  • Co-Investigator                 
    2009 – 2012: ‘Welsh Composites Centre KTC’, A4B (WAG), £ 655k.
  • Principal Investigator      
    2010 – 2012: ‘Composite Wing Bonded Repair: Phase 2’, A4B (WAG), £300k.
  • Principal Investigator      
    2010 – 2015: ‘ASTUTE – Advanced Sustainable Manufacturing Technologies’, WEFO (WG), £ 26.7 Mio.
  • Principal Investigator      
    2011 – 2018: ‘MATTER – Manufacturing Advances Through Training Engineering Researchers’, EPSRC part-funded. £3.05 Mio. £1.25 Mio EPSRC. plus £1.8 Mio from industry.
  • Co-Investigator
    2013 – 2014: ‘Materials Advanced Characterisation Centre (MACH1)’, A4B, HE09161002, WEFO (WG), £ 707k.
  • Principal Investigator
    2015 – 2020: ‘ASTUTE 2020 – Advanced Sustainable Manufacturing Technologies’, WEFO (WG), £ 14.3 Mio

Third Mission Projects

  • Principal Investigator      
    2006 – 2008: ‘KEF CIT WECOTAC – Welsh Composites Training Consortium’,   £ 225.5k.
  • Principal Investigator      
    2006 – 2008: ‘KEF TTN WECON – Welsh Composites Network’, £158k.
  • Principal Investigator      
    2015 – 2015: “Airbus and Aerospace Training Facility, WG, £2.7 Mio.

Selected publications

  • Innocente, Silvana Maria Bastos Afonso, Johann Sienz, Helen Margaret Davies, Particle swarm algorithm with adaptive constraint handling and integrated surrogate model for the management of petroleum fields, Applied Soft Computing, 2015, 34, [ISSN:15684946], [DOI: 10.1016/j.asoc.2015.05.032]
  • Lintao Zhang, Fawzi Belblidia, Ian Cameron, Johann Sienz, Matthew Boat, Neil Pearson, Influence of Specimen Velocity on the Leakage Signal in Magnetic Flux Leakage Type Nondestructive Testing, Journal of Nondestructive Evaluation, 2015, 34, 2, [ISSN:0195-9298], [DOI: 10.1007/s10921-015-0280-1]
  • J. A. Cherry, H. M. Davies, S. Mehmood, N. P. Lavery, S. G. R. Brown, J. Sienz, Investigation into the effect of process parameters on microstructural and physical properties of 316L stainless steel parts by selective laser melting, The International Journal of Advanced Manufacturing Technology, 2015, 76, 5-8, [ISSN:0268-3768], [DOI: 10.1007/s00170-014-6297-2]
  • Will Newton, Mel Lewis, David Carswell, Nicholas P. Lavery, Benjamin Evans, David Bould, Johann Sienz, Investigating the thermal profile of a marine vessel engine room through simulation with field measurements, Applied Thermal Engineering, 2014, 73, 1, [ISSN:13594311], [DOI: 10.1016/j.applthermaleng.2014.09.019]
  • J. Eckermann, S. Mehmood, H.M. Davies, N.P. Lavery, S.G.R. Brown, J. Sienz, A. Jones, P. Sommerfeld, Computational modeling of creep-based fatigue as a means of selecting lead-free solder alloys, Microelectronics Reliability, 2014, 54, 6-7, [ISSN:00262714], [DOI: 10.1016/j.microrel.2014.02.017]
  • C. Giannetti, R.S. Ransing, M.R. Ransing, D.C. Bould, D.T. Gethin, J. Sienz, A novel variable selection approach based on co-linearity index to discover optimal process settings by analysing mixed data, Computers & Industrial Engineering, 2014, 72, [ISSN:03608352], [DOI: 10.1016/j.cie.2014.03.017]
  • T Murmu, J Sienz, S Adhikari, C Arnold, Nonlocal buckling of double-nanoplate-systems under biaxial compression, Composites Part B: Engineering, 2013, 44, 1, pp.84, [ISSN:13598368], [DOI: 10.1016/j.compositesb.2012.07.053]
  • Y Chandra, F Scarpa, R Chowdhury, S Adhikari, J Sienz, Multiscale hybrid atomistic-FE approach for the nonlinear tensile behaviour of graphene nanocomposites, Composites Part A: Applied Science and Manufacturing, 2013, 46, pp.147, [ISSN:1359835X], [DOI: 10.1016/j.compositesa.2012.11.006]
  • Fabian Fuerle, Johann Sienz, Decomposed surrogate based optimization of carbon-fiber bicycle frames using Optimum Latin Hypercubes for constrained design spaces, Computers & Structures, 2013, 119, pp.48, [ISSN:00457949], [DOI: 10.1016/j.compstruc.2012.11.014]
  • Mariela Luege, Antonio Orlando, Johann Sienz, A finite strain contact model for mixed lubricated surfaces in forming processes, Applied Mathematical Modelling, 2013, 37, 24, [ISSN:0307904X], [DOI: 10.1016/j.apm.2013.06.003]
  • E.I. Saavedra Flores, F.A DiazDelaO, M.I Friswell, J Sienz, A computational multi-scale approach for the stochastic mechanical response of foam-filled honeycomb cores, Composite Structures, 2012, 94, 5, [ISSN:02638223], [DOI: 10.1016/j.compstruct.2011.11.001]
  • Johann Sienz, Vibration frequency of graphene based composites: A multiscale approach, Materials Science and Engineering: B, 2012, 177, 3, [DOI: 10.1016/j.mseb.2011.12.024]
  • Johann Sienz, Optimization-driven design of dies for profile extrusion: Parameterization, strategy, and performance, Polymer Engineering & Science, 2012, [DOI: 10.1002/pen.23228]
  • Johann Sienz, Quantified Surface Improvement Using Temperature Cycle Injection Moulding, International Polymer Processing The Journal of the Polymer Processing Society, 2011, [DOI: 10.3139/217.2454]
  • T Murmu, J Sienz, S Adhikari, C Arnold, Nonlocal buckling behavior of bonded double-nanoplate-systems, Journal of Applied Physics, 2011, 110, 8, [ISSN:00218979], [DOI: 10.1063/1.3644908]
  • J Sienz, A Goublomme, M Luege, Sensitivity analysis for the design of profile extrusion dies, Computers & Structures, 2010, 88, 9-10, [ISSN:00457949], [DOI: 10.1016/j.compstruc.2010.02.003]
  • Johann Sienz, Finite element analysis of the middle ear transfer functions and related pathologies, Medical Engineering & Physics, 2009, [DOI: 10.1016/j.medengphy.2009.06.009]
  • Johann Sienz, Converging flow inline rheometry for engineering extensional viscosity of uPVC, Plastics, Rubber and Composites, 2009, [DOI: 10.1179/174328909X387739]
  • Johann Sienz, Water assisted injection moulding: development of insights and predictive capabilities through experiments on instrumented process in parallel with computer simulations, Plastics, Rubber and Composites, 2008, [DOI: 10.1179/174328908X283438]
  • A Polynkin, Pittman, J.F.T., J Sienz, Gas Assisted Injection Molding of an Industrial Part: 3D Simulation Provides Virtual Molding Trials, International Polymer Processing, 2007, 2007, 02, pp.173-178, [ISSN:0930-777X], [DOI: 10.3139/217.0996]
  • H.J Ettinger, J Sienz, J.F.T Pittman, A Polynkin, Parameterization and optimization strategies for the automated design of uPVC profile extrusion dies, 2004, pp.180-194, [ISBN:1615-147X], [DOI: 10.1007/s00158-004-0440-x]
  • A Polynkin, J.F.T Pittman, J Sienz, Gas displacing liquids from tubes: high capillary number flow of a power law liquid including inertia effects, 2004, pp.2969-2982, [ISBN:0009-2509], [DOI: 10.1016/j.ces.2004.04.029]
  • S.J Bates, J Sienz, D.S Langley, Formulation of the Audze-Eglais Uniform Latin Hypercube design of experiments, 2003, pp.493-506, [ISBN:0965-9978], [DOI: 10.1016/S0965-9978(03)00042-5]

Research theses supervised

PhD

  • 2015 - 'Experimental material characterisation and testing procedures for complex computational modelling' (2nd Supervisor: Professor John Arnold)
  • 2015 - Methodologies for the design of support structures for metal based additive layer manufacturing (2nd Supervisor: Dr Fawzi Belblidia)
  • 2012 - 'Development of Evolutionary based Techniques with Applications to Engineering ' (2nd Supervisor: Dr Antonio Orlando)
  • 2010 - 'Experimentation and Simulation for Additive Layer Manufacturing and Design' (2nd Supervisor: Professor Stephen Brown)
  • 2010 - 'Relating the NDT signature to performance loss in damaged composites' (1st Supervisor: Professor John Arnold)
  • 2009 - 'Temperature Cycle Injection Moulding of Mirco Channels' (2nd Supervisor: Dr John Pittman)
  • 2009 - '''Seat shape acquisition, analysis and optimisation for pressure ulcer prevention''' (1st Supervisor: Dr Paul Holland)
  • 2009 - Optimization of tall structured buildings with multi-uncertainties (1st Supervisor: Dr Chenfeng Li)
  • 2007 - Structural Optimization in Engineering design with a focus on process automation (2nd Supervisor: Dr John Pittman)
  • 2006 - Development and testing of a particle swarm optimizer to handle hard unconstrained and constrained problems (2nd Supervisor: Dr John Pittman)
  • 2006 - The development of coupled acoustic and structural topology and shape optimization for aplication in internal aviation panel design. (2nd Supervisor: Dr John Pittman)
  • 2002 - The Calibration Process in Thermoplastics Extrusion (2nd Supervisor: Dr John Pittman)
  • 2000 - Development and Application of Flexible Optimization and Robust Design Methods (2nd Supervisor: Dr John Pittman)
  • 2000 - Computational Three dimensional rubber probile die optimisation on the basis of accurate experimental material parameter determination (2nd Supervisor: Dr John Pittman)
  • 2000 - Computational Three dimensional uPVC profie die optimisation with experimental material parameter determination (2nd Supervisor: Dr John Pittman)
  • 1997 - To be defined
  • 1997 - To be defined
  • 1994 - Automatic CAD Model Based Simulation of PVC Extrusion and Calibration (2nd Supervisor: Dr John Pittman)

EngD

  • 2015 - 'Experimental material characterisation and testing procedures for complex computational modelling' (2nd Supervisor: Professor John Arnold)
  • 2013 - Thermal imaging based melt pool depth prediction system (1st Supervisor: Dr Nicholas Lavery)
  • 2013 - Aligning energy storage solutions for wind energy convertors with locality (1st Supervisor: Dr Thomas Croft)
  • 2012 - Intelligent Beams for Concept Vehicle Design (2nd Supervisor: Dr Wulf Dettmer)
  • 2012 - Simulation of Titanium Alloy Impact Behaviour (1st Supervisor: Professor Eduardo De Souza Neto)
  • 2012 - Multi-scale Flow Modelling of Medical Devices for Improved Design and Manufacture (1st Supervisor: Dr Raoul Van Loon)
  • 2011 - 'Controlling and modelling the structure of multi-phase polymeric materials during injection moulding and the effects on properties' (1st Supervisor: Professor John Arnold)
  • 2011 - 'Novel Design and Manufacturing approaches in the context of the land speed record vehicle, BLOODHOUND SCC' (1st Supervisor: Dr Benjamin Evans)
  • 2010 - 'Industrial case study driven innovative optimised engineering design' (2nd Supervisor: Dr Antonio Gil)
  • 2010 - Numerical analysis of new age composite materials and evaluating their suitability for various applications (2nd Supervisor: Dr David Bould)
  • 2010 - 'Development of heat transfer modelling techniques for solving complex industrial problems supported with experimentation' (2nd Supervisor: Dr Benjamin Evans)
  • 2009 - 'The analysis of bonded repair solutions for primary composite aircraft structures' (2nd Supervisor: Professor Stephen Brown)
  • 2008 - 'Experimental investigations into the behaviour of composite aircraft wing repairs' (1st Supervisor: Professor John Arnold)

MPhil

  • 2012 - 'Development of Evolutionary based Techniques with Applications to Engineering ' (2nd Supervisor: Dr Antonio Orlando)
  • 2008 - The Performance Analysis of Large, Structured-Wall HDPE Pipes (2nd Supervisor: Dr John Pittman)
  • 2004 - Computational Investigation of Human Body Movement and Associated Muscle Activity (2nd Supervisor: Dr John Pittman)
  • 2003 - An experimental study of heat transfer int he cooling channel of gas turbine rotor blads (1st Supervisor: Professor Arthur Lees)

MRes

  • 2009 - 'The analysis of bonded repair solutions for primary composite aircraft structures' (2nd Supervisor: Professor Stephen Brown)
  • 2009 - The Characterisation of the Structural Performance of Thermal Insulation Panels (1st Supervisor: Professor John Arnold)
  • 2008 - 'Finite Element based Analysis and Optimization of Composite Materials with Racing Car seat Investigations' (2nd Supervisor: Professor John Arnold)
  • 2008 - Design and Optimization of Joints in a Carbon Fibre Bicycle Frame (2nd Supervisor: Professor Stephen Brown)
  • 2003 - To be defined

MSc

  • 2008 - Aether's 100X Range Optimization using particle swarm optimization

Additional information

Teaching

  • EG-M33 - Computational Case Study for Research Engineers (15/16)
  • EG-700 - MRes Engineering Research Thesis (15/16)

Awards and invited lectures

Prize winning applications and awards

Publications

  • Best Paper Presentation Prize in the design engineering section of the 45th AIAA/ASME/ASCE/ AHS/ASC, 2004.
  • Best Poster Prize in the category: ‘Best Materials and Design Innovation’ awarded by Materials KTN: ‘3D simulation of water assisted injection Moulding’, 2007
  • Alan Glanvill Award for published work of particular merit in the field of polymers as awarded by the Institute of Materials, Minerals and Mining, 2007.

Academic

  • 4 year academic scholarship, Government of Federal State Bavaria, 1984
  • 2 year academic scholarship, DAAD (German Academic Exchange Service), 1990

Invited Lectures

  • ‘Fluid Assisted Injection Moulding Simulation: Virtual Prototyping for Complex Parts’, 8th CST/5th ECT International Conference, Las Palmas de Gran Canaria, Spain. 2006.
  • ‘Gas Assisted Injection Moulding: 3-D Simulation and Industrial Case Studies’, PPE 05 International Conference, Bradford, 2005.
  • ‘Simulation and Optimization for Polymer Processing’, 7th CST/4th ECT International Conference, Lisbon, Portugal, 2004.
  • ‘Gas assisted injection moulding of a handle: three dimensional simulation and comparison with moulding trials and moldflow simulation’, 6th ESAFORM International Conference, Italy, 2003.
  • ‘Automated Optimization of Extrusion Die Design for PVC Profiles’, 6th ESAFORM International Conference, Italy, 2003.
  • ‘Parameterization techniques for two- and three-dimensional automated optimisation of PVC extrusion dies’, 18th Annual Polymer Processing Society Meeting, Guimarães, Portugal, 2002.
  • ‘Optimization of thermoplastics extrusion die design: parameterization, algorithms and strategies’, 5th ESAFORM 2002 International Conference, Cracow, Poland, 2002.
  • ‘Optimisation strategies for extrusion die design’, 4th ESAFORM 2001 International Conference, Liege, Belgium, 2001.
  • ‘3-D Simulation of Advanced Injection Moulding Technologies’, 4th ESAFORM 2001 International Conference, Liege, Belgium, 2001.
  • ‘Engineering design optimization within the FIDO environment’, 1º Workshop em Mecânica Computacional, UFPE, Recife, Brazil, 2000.

Publications

Research Monograph

  • E. Hinton, J. Sienz and M. Özakça, ‘Analysis and Optimization of Prismatic and Axisymmetric Shell Structures: Theory, Practice and Software’, Springer Verlag, 2003, ISBN: 1852334215. 528 pages, 247 illustrations, CD-Rom with ~ 60,000 lines of source code.

Refereed Journal Papers (IF = impact factor)

  • E. Hinton, N.V.R. Rao and J. Sienz, ‘Finite element structural shape and thickness optimisation of axisymmetric shells’, Engineering Computations (IF 0.54), Pineridge Press, Swansea, UK, 9, 499-527, 1992.
  • E. Hinton, M. Özakça and J. Sienz, ‘Optimum shapes of vibrating axisymmetric plates and shells’, Journal of Sound and Vibration (IF 0.83), Academic Press Ltd, UK, 167, 511-528, 1993.
  • E. Hinton and J. Sienz, ‘Fully stressed topological design of structures using an evolutionary procedure’, Engineering Computations (IF 0.54), Pineridge Press, Swansea, UK, 12, 229-244, 1995.
  • M. Papadrakakis, Y. Tsompanakis, E. Hinton and J. Sienz, ‘Advanced solution methods in topology optimisation and shape sensitivity analysis’, Engineering Computations (IF 0.54), MCB University Press, UK, 13(5), 57 - 90, 1996.
  • J. Sienz and E. Hinton, ‘Reliable structural optimisation with error estimation, adaptivity and robust sensitivity analysis’, Computers and Structures (IF 0.74), 64(1-4), 31-63, 1997.
  • J. Sienz, I. Szarvasy, E. Hinton and M.L. Andrade, ‘Computational modelling of 3D objects by using fitting techniques and subsequent mesh generation’, Computers and Structures (IF 0.74), 78(1-3), 397-413, 2000.
  • I. Szarvasy, J. Sienz, J.F.T. Pittman and E. Hinton, ‘Computer aided optimisation of profile extrusion dies: definition and assessment of the objective function’, International Polymer Processing (IF 0.69), XV (2000) 1, 28 – 39, 2000.
  • S. Bulman, J. Sienz and E. Hinton, ‘Comparisons between algorithms for structural topology optimization using a series of benchmark studies’, Computers and Structures (IF 0.74), 79, 1203-1218, 2001.
  • J. Sienz and S. Bulman, ‘Adaptivity and optimisation – ADOPT’, Engineering Computations (IF 0.54), 18 (1/2), pp 10 – 47, 2001. ISSN 0264-4401.
  • S.J. Bates, J.F.T. Pittman, J. Sienz and D.S. Langley, ‘Enhancing Slit Die Performance by Optimization of Restrictor Profiles’, Polymer Engineering & Science (IF 1.22), 43(8), 1500-1511, 2003.
  • S.J. Bates, J. Sienz and D.S. Langley, ‘Formulation of the Audze-Eglais Design of Experiments using a Genetic Algorithm’, Advances in Engineering Software (IF 0.37), 34(8), 493-506, 2003, 2003.
  • A. Polynkin, J.F.T. Pittman and J. Sienz, ‘Gas displacing liquids from tubes: high capillary number power law flow including inertia effects’, Chemical Engineering Science (IF 1.66), 59(14), pp 2969-2982, 2004.
  • H. Ettinger, J. Sienz, J.F.T. Pittman and A. Polynkin, ‘Parameterization and optimization strategies for the automated design of uPVC profile extrusion dies’, Structural and Multidisciplinary Optimization (IF 0.81), 28(2-3), pp 180 - 194, 2004.
  • A. Polynkin, J.F.T. Pittman and J. Sienz, ‘Modelling of cyclic 3-dimensional heat transfer in injection moulding’, International Polymer Processing (IF 0.69), XIX (2004) 4, 408 - 418, 2004.
  • A. Polynkin, J.F.T. Pittman and J. Sienz, ‘Gas displacing liquids from non-axisymmetric tubes: high capillary number shear thinning fluids’, Chemical Engineering Science (IF 1.66), 60, 1591 – 1602, 2005.
  • A. Polynkin, J.F.T. Pittman and J. Sienz, ‘3D-simulation of primary and secondary gas penetration in injection moulding: comparison with experimental results’, International Polymer Processing (IF 0.69), XX (2005) 2, 191 – 201, 2005.
  • F. Belblidia, J.F.T. Pittman, A. Polynkin and J. Sienz, ‘Gas displacing viscous shear thinning liquids from tubes: effects of cooling before gas injection’, Chemical Engineering Science (IF 1.66), 60 (2005), 4953 – 4956, 2005.
  • S.M.B. Afonso, J. Sienz and F. Belblidia, ‘Structural optimisation strategies for simple and integrally stiffened plates and shells’, Engineering Computations (IF 0.54), 22(4), 429 – 452, 2005.
  • A. Polynkin, J.F.T. Pittman and J. Sienz, ‘Gas assisted injection molding of a handle: three dimensional simulation and experimental verification’, Polymer Engineering & Science (IF 1.22), 45(8), 1049 – 1058, 2005.
  • A. Polynkin, J.F.T. Pittman and J. Sienz, ‘Industrial application of gas assisted moulding: numerical predictions and experimental trials’, Plastics, Rubbers & Composites (IF 0.41), 34(5/6), 236 – 246, 2005.
  • J. Sienz, S.J. Bates and J.F.T. Pittman, ‘Flow restrictor design for extrusion slit dies for a range of materials: simulation and comparison of optimization techniques’, Finite Elements in Analysis and Design (IF 0.84), 42, 430 - 453, 2006.
  • A. Polynkin, J.F.T. Pittman and J. Sienz, ‘prediction of gas core geometry in gas assisted injection molding using a short cut method', Polymer Engineering & Science (IF 1.22), 42(5), 713 – 720, 2007.
  • [AR = PhD, JFTP, AP = co-workers. JS: 15% contribution to all aspects of the work, including leadership of the project.]
  • A. Polynkin, J.F.T. Pittman and J. Sienz, ‘Gas assisted injection molding of an industrial part: 3-d simulation provides virtual molding trials’, International Polymer Processing (IF 0.69), XXII (2007) 2, 173 - 178, 2007.
  • A. Rippl, J.F.T. Pittman, A. Polynkin and J. Sienz, ‘Simultaneous determination of shear and extensional viscosities and wall slip by on-line rheometry with parameter fitting: an application to EPDM rubber’, Rheologica Acta (IF=1.43), 46, 847 – 860, 2007.

Chapters in Books

  • J. Sienz and E. Hinton, ‘Chapter 13: Integrated design and analysis modelling in structural shape optimisation’, in M. Papadrakakis and G. Bugeda, (eds), Advanced computational methods in structural mechanics, pp 235 - 265, CIMNE, Barcelona, 1996. ISBN 84-87867-75-8.
  • J. Sienz and E. Hinton, ‘Chapter 12: Sensitivity analysis for shape optimisation’, in M. Papadrakakis and G. Bugeda, (eds), Advanced computational methods in structural mechanics, pp 216 - 234, CIMNE, Barcelona, 1996. ISBN 84-87867-75-8.
  • J. Sienz, B. Hassani and E. Hinton, ‘Chapter 11: Structural optimisation’, in M. Papadrakakis and G. Bugeda, (eds), Advanced computational methods in structural mechanics, pp 185 - 215, CIMNE, Barcelona, 1996. ISBN 84-87867-75-8.
  • J. Sienz, C. Silva, E. Hinton and I. Szarvasy, ‘Chapter 13: Computer aided design of extrusion dies’, in M. Papadrakakis and B.H.V. Topping (eds), Innovative computational methods for structural mechanics, Saxe-Coburg Publications, pp 271 - 303, Edinburgh, 1999. ISBN 1-874672-05-9.
  • J. Sienz, E. Hinton, G. Bugeda, and S. Bulman, ‘Chapter 11: Some studies on integrating topology and shape optimization’, in M. Papadrakakis and B.H.V. Topping (eds), Innovative computational methods for structural mechanics, Saxe-Coburg Publications, pp 223 - 256, Edinburgh, 1999. ISBN 1-874672-05-9.
  • M. Papadrakakis, Y. Tsompanakis, N.D. Lagaros, E. Hinton, J. Sienz, G. Thierauf and J. Cai, ‘Chapter 10: Innovative computational methods for structural optimization’, in M. Papadrakakis and B.H.V. Topping (eds), Innovative computational methods for structural mechanics, Saxe-Coburg Publications, pp 195 - 222, Edinburgh, 1999. ISBN 1-874672-05-9.
  • J. Sienz, J.F.T. Pittman and A. Polynkin, ‘Simulation and Optimization for Polymer Processing’, Invited Lecture, in B.H.V. Topping and C.A. Moares (eds), Progress in Engineering Computational Technology, Saxe-Coburg Publications, pp 189 – 218, Edinburgh, UK. 2004. ISBN 1-874672-22-9.
  • A. Polynkin, J.F.T. Pittman and J. Sienz, ‘Gas Assisted Injection Moulding: 3D Simulation and Industrial Case Studies’, Invited Lecture, in P.D. Coates (ed), Polymer Process Engineering 05: Enhanced Polymer Processing, pp 288 – 325, Bradford, UK, 2005.
  • J. Sienz, J.F.T. Pittman and A. Polynkin, ‘Fluid Assisted Injection Moulding Simulation: Virtual Prototyping for Complex Parts’, Invited Lecture, in B.H.V. Topping, G. Montero and R. Montenegro (eds), Innovation in Engineering Computational Technology, pp 287 - 308, Saxe-Coburg Publications, Edinburgh, UK. 2006.
  • J.F.T. Pittman, A. Polynkin, J. Sienz, L. Mulvaney-Johnson, E. Brown, A. Dawson, P.D. Coates, K. Vinning, J. Butler, ‘Water assisted injection moulding: development of insights and predictive capabilities though experiments on an instrumented process in parallel with computer simulations’, in P.D. Coates (ed), Polymer Process Engineering 05: Enhanced Polymer Processing, pp 323 – 358, Bradford, UK, 2007. ISBN 13-978-1-85143-248-6.

Edited Works

  • J. Sienz (ed), Proceedings of the 2nd ASMO UK / ISSMO Conference on Engineering Design Optimization, University of Wales Swansea, Swansea, SA2 8PP, UK, July 2000, ISBN: 0-86076-168-1.

  • O.M. Querin, J. Sienz, V.V. Toropov and P.D. Gosling (eds), Proceedings of the 5th ASMO UK / ISSMO Conference on Engineering Design Optimization, Stratford-upon-Avon, July 2004, CD-ROM, ISBN: 0-85316-246-8.

  • J. Sienz, V.V. Toropov and O.M. Querin (eds), Proceedings of the 6th ASMO UK / ISSMO Conference on Engineering Design Optimization, Oxford, July 2006, CD-ROM.

Funding awards

  • Advanced Injection Moulding Technologies for Plastics, Simulation and Validation’, 1999 – 2002 (EPSRC).
  • ‘Computer Aided Optimisation of Extrusion Die Design’, 2000 – 2004 (EPSRC).
  • ‘Central Parallel Computing Facility For the Department of Mechanical Engineering’, 2001 – 2004 (EPSRC).
  • ‘The Calibration Process In Thermoplastics Extrusion: Computer Simulation And Optimisation With Experimental Trials’, 2002 – 2005 (EPRSC).
  • ‘Injection Moulding Process Intensification’, 2004 – 2005 (Carbontrust).
  • ’Development of 3D simulation of water assisted injection moulding of polymers guided and validated by experimentation using an instrumented process’, 2006 – 2008 (EPRSC).