Podcasts

Validation of numerical simulations - a step forward

 Prof Eann Patterson from the University of Liverpool talks about validation of computational solid mechanics models using strain fields measured with camera-based systems. How much evidence do we need to accept a model as being an appropriate representation of reality? And how can we extract a meaningful quality measure from a comparison of millions of measurement and simulation data points?

 

Validation of numerical simulations - test cases from solid mechanics

 Prof. George Lampeas from the University of Patras presents a generic validation procedure and applies it to a diversity of problems from solid mechanics: thermo-mechanical verification of a space antenna reflector; indentation of soft non-linear material; bending of a structural beam. These test cases were part of the Validation Interlaboratory Study.

 

Calibration of camera-based instruments

 Dr Erwin Hack from Empa, Switzerland, introduces a procedure and reference materials appropriate for calibration of camera-based instruments to measure strain and deformation. Calibration is a pre-requisite for the traceability of measurement results, and for using them in a validation process for numerical simulations. More information on calibration is found here.

 

An image decomposition approach to validation

  Dr Erwin Hack from Empa addresses validation of the design of engineering structures by comparing FE results to camera-based measurement data. After decomposition of the full-field data sets data compatibility is quantified by the distance of the parameters. This generic methodology allows for quantifying model quality.

MOTIVATE Consortium

University of Liverpool / UK

Swiss Federal Labs for Mat. Science&Technology / CH

Dantec Dynamics GmbH / DE

Athena Research and Innovation Center / EL

Airbus Operation Ltd, Bristol / UK

Airbus Operations SAS, Toulouse / FR


Project Overview

Welcome to MOTIVATE
/documents/1583244/0/EC_flag/d19f0289-0c08-494c-9842-678172cf3050?t=1509629404583

MOTIVATE is an Innovation Action within the European Commission's Horizon 2020 Clean Sky 2 program under Grant Agreement No. 754660, supported by the Swiss State Secretariat for Education, Research and Innovation (SERI) under contract number 17.00064.

Our team involves Airbus Operations SAS as Topic Manager as well as University of Liverpool (the Coordinator), Empa, Dantec Dynamics GmbH and Athena Research and Innovation Center as Beneficiaries.

The goal of the project is to deploy a CEN validation method to numerical results from FE simulations of a subcomponent test based on measurements using Digital Image Correlation. Results of this test at Airbus UK as well as preliminary tests at Empa will be documented on this website. An introductory video is found on Empa TV.

From our research, we expect progress on methods for DIC calibration and model validation, notably on measuring the quality of data comparison. There is a Knowledge Exchange workshop planned for 2019 to present and discuss the latest relevant findings.

The work is based on a Support Action that was conducted in the FP7 project VANESSA.

Now if you are new to the field of validation or want to consult related documents, you will find relevant publications and presentations on this website.

Clean Sky 2 Joint Undertaking
/documents/1583244/1592646/CS2JU/5973e973-3cba-404e-8a78-b17138cf72e0?t=1511523236597

Clean Sky is the largest European research programme developing innovative, cutting-edge technology aimed at reducing CO2, gas emissions and noise levels produced by aircraft. Funded by the EU’s Horizon 2020 programme, Clean Sky contributes to strengthening European aero-industry collaboration, global leadership and competitiveness.

News

The MOTIVATE project team held its midterm Review Meeting in Zurich, Switzerland, on 6-8 November 2018. The partners demonstrated DIC calibration procedures and started deploying the draft validation protocols during a static test of the Airbus panel.


Contacts

Prof Dr Eann Patterson
Project Coordinator
University of Liverpool

Eszter

Dr Eszter Szigeti
Topic Manager
Airbus UK

 

 


Publications Overview

Dissemination and Communication
The focus is on communicating the outcomes of the project to both stake-holders in the project, the Clean Sky Joint Undertaking, the aerospace industry in general and the wider engineering and industrial community. We use a variety of media including this website, webinars, a workshop, journal papers, digital shorts and a blog. You will also find background papers on validation and calibration on this site.

Background Publications on Validation

Selected publications related to validation and image decomposition
Journal Papers and Proceedings

 

  • Patterson,E.A., Whelan, M.P., On the validation of variable fidelity multi-physics simulations, J. Sound and Vibration 448 (2019) 247-258
  • Dvurecenska, K., Graham,S., Patelli, E., Patterson,E.A., A probabilistic metric for the validation of computational models, R. Soc. open sci. 5 (2018) 180687
  • Hack, E., Lampeas, G., Patterson,E.A., An evaluation of a protocol for the validation of computational solid mechanics models, J. Strain Analysis for Engineering Design, 51 (2016) 5-13
  • Dvurecenska, K., Patterson, E.A., Patelli, E. Graham, S.J., Preliminary evaluation of validation metrics for computational mechanics models, Proc. 10th Int. Conf. on Advances in Exptl. Mech., September 1-3, 2015.
  • Sebastian, C.M., Hack, E., Patterson, E.A., An approach to the validation of computational solid mechanics models for strain analysis, J. Strain Analysis for Engineering Design 48 (2013) 36-47
  • Patterson, E.A., Feligiotti, M., Hack, E., On the Integration of Validation, Quality Assurance and Non-Destructive Evaluation, J. Strain Analysis for Engineering Design 48 (2013) 48-58
  • Wang, W., Mottershead, J.E., Siebert, Th., Pipino, A., Frequency responses of shape features from full-field vibration measurements using digital image correlation, Mechanical Systems and Signal Processing 28 (2012) 333-347
  • Wang, W., Mottershead, J.E., Sebastian, C.M., Patterson, E.A., Shape features and finite element model updating from full-field strain data, Int. J. of Solids and Structures 48 (2011) 1644-1657
  • Wang, W.; Mottershead, J. E.; Sebastian; C.; Patterson, E. A., Image processing of full-field strain data and its use in model updating, Journal of Physics: Conference Series 305 (2011) 012011
  • Feligiotti, M.; Hack, E.; Lampeas, G.; Wang, W.; Mottershead, J. E.; Burguete. R., Use of integrated simulation and experimentation to quantify impact damage, Applied Mechanics and Materials 70 (2011) 51-56
  • Wang, W.; Mottershead, J. E.; Sebastian, C.; Patterson, E. A.; Siebert, Th.; Ihle; A.; Pipino, A., Image Analysis for Full-Field Displacement / Strain Data: Method and Applications, Applied Mechanics and Materials 70 (2011) 39-44
  • Lampeas, G., Pasialis, V., Siebert, Th., Feligiotti, M., Pipino, A., Validation of impact simulations of a car bonnet by full-field optical measurements, Applied Mechanics and Materials 70 (2011) 51-56
  • Wang, W., Mottershead, J.E., Ihle, A., Siebert, T., Schubach, R., Finite Element Model Updating From Full-Field Vibration Measurement Using Digital Image Correlation, J. of Sound and Vibration 330 (2011) 1599-1620
  • Wang, W., Mottershead, J.E., and Mares, C., Vibration Mode Shape Recognition using Image Processing, J. of Sound and Vibration 326 (2009) 909-938
  • Mottershead, J.E., Wang, W., Patki, A., Patterson, E.A., Construction of shape features for the representation of full-field displacement/strain data, 7th BSSM Int. Conf. on Advances in Experimental Mechanics, Liverpool (UK), 7-9 September 2010, In: R.A.W. Mines and J.M. Dulieu-Barton, Eds. Applied Mechanics and Materials 24-25 (2010) 365-370.
  • Hack, E., Feligiotti, M., Lampeas, G., Siebert, T., Pipino, A., Ihle, A., Assessment of impact damage in CFRP by combined thermal and speckle methods, in: Speckle 2010, Florianopolis (BR), 13-15 September 2010, Armando Albertazzi Goncalves, Jr., Guillermo H. Kaufmann, Eds., Proc SPIE 7387 (2010) 73870H
  • Hack, E.; Lampeas; G.; Mottershead, J. E.; Patterson, E.; Siebert, Th.; Whelan, M., Standards for Validating Stress Analyses by Integrating Simulation and Experimentation, Proc. SEM, Indianapolis 2010, USA, 7-10 June 2010, 100-106
  • Hack, E., and Patterson, E.A., Experimental Validation of Simulations Using Full-field Measurement Techniques, AIVELA 9th International Conference on Vibration Measurements by Laser and Noncontact Techniques, Ancona (IT), 23-25 June 2010, AIP Conf. Proc, 1253 (2010) 405-409
  • Wang, W., Mottershead, J.E., and Mares, C., Statistical Mode-Shape Identification Using Image Processing and Pattern Recognition, Proc. 2nd Int. Conf. Uncertainty in Structural Dynamics, Sheffield, 15-17 June 2009, 291-300
  • Wang, W., Mottershead, J.E., and Mares, C., Shape descriptors for mode-shape recognition and model updating, Modern Practice in Stress and Vibration Analysis, Cambridge, 8-10 September 2009, J. of Physics: Conference Series 181 (2009) 01200
Special Sessions and Conference Contributions
  • Hack, E., Patterson, E.A., An image decomposition approach to validation, 11th World Congress on Computational Mechanics (WCCM XI), 5th. European Conference on Computational Mechanics (ECCM V), July 20-25, 2014, Barcelona, Spain
  • T. Siebert, V. Wang, J. Mottershead, A. Pipino (CRF), Validation of mode shapes of car bonnet by high speed Digital Image Correlation, 11th World Congress on Computational Mechanics (WCCM XI), 5th. European Conference on Computational Mechanics (ECCM V), July 20-25, 2014, Barcelona, Spain
  • A. Ihle, O. Reichmann, Correlation and validation of numerical simulation and test in the space industry , 11th World Congress on Computational Mechanics (WCCM XI), 5th. European Conference on Computational Mechanics (ECCM V), July 20-25, 2014, Barcelona, Spain
  • N. Perogamvros, T. Siebert, G. Lampeas, Validation of composite joint coupon models using full-field optical measurement techniques, 11th World Congress on Computational Mechanics (WCCM XI), 5th. European Conference on Computational Mechanics (ECCM V), July 20-25, 2014, Barcelona, Spain
  • L. Felipe-Sese, W. Gong, X. Lin, and E. A. Patterson, Validation of a non-linear contact mechanics problem, 11th World Congress on Computational Mechanics (WCCM XI), 5th. European Conference on Computational Mechanics (ECCM V), July 20-25, 2014, Barcelona, Spain
  • G. Lampeas, T. Siebert, E. Hack, E.A. Patterson, Credibility of Computational Solid Mechanics Models, 11th World Congress on Computational Mechanics (WCCM XI), 5th. European Conference on Computational Mechanics (ECCM V), July 20-25, 2014, Barcelona, Spain
     
  • A. Ihle, O. Reichmann, E.A. Patterson, VANESSA - Validation of Numerical Engineering Simulations: Standardisation Actions, European Conference on Spacecraft Structures, Materials & Environmental Testing, Braunschweig, Germany, 1-4 April 2014
  • A. Ihle, O. Reichmann, VANESSA - Validation of Numerical Engineering Simulations-Standardisation Action, Seminar Hochleistungsstrukturen im Leichtbau "Effiziente Korrelationsmethoden von Simulationen und Tests", Munich, Germany, 27 Nov 2013
     
  • L. Felipe-Sese and E.A. Patterson, A novel low-cost approach for 3D displacement measurement using fringe projection and DIC, BSSM International Conference on Experimental Mechanics, 3-5 September 2013, Cardiff, UK
  • E. Hack, Calibration ILS, BSSM International Conference on Experimental Mechanics, 3-5 September 2013, Cardiff, UK
  • G. Lampeas, Validation ILS, BSSM International Conference on Experimental Mechanics, 3-5 September 2013, Cardiff, UK
  • W. Gong and E.A. Patterson, Delamination-driven buckling in delaminated composite laminates under pure bending, BSSM International Conference on Experimental Mechanics, 3-5 September 2013, Cardiff, UK
  • D. Lowe, R. Hope and E.A. Patterson, Experimental validation of finite element analysis of chemical pipe-work, BSSM International Conference on Experimental Mechanics, 3-5 September 2013, Cardiff, UK
  • E.A. Patterson, Overview of CEN WS71, BSSM International Conference on Experimental Mechanics, 3-5 September 2013, Cardiff, UK
     
  • E.A. Patterson, Validation of Solid Mechanics Models, AIAS Summer School, 17-18 June 2013, Ferrara, Italy
  • E.A. Patterson, The VANESSA project, iCAIM  International Conference on Applications for Image based Measurements, 19-20 March 2013, Ulm, Germany
  • Hack, E., Patterson, E.A.,  Lampeas, G., Mottershead, J., Siebert, T.,  Whelan, M., Using full-field measurement techniques to validate simulations of dynamic events, Photomechanics 2011 conference, Brussels, BE, 07-09 Feb 2011
  • Hack, E., Patterson, E.A.,  Lampeas, G., Mottershead, J., Siebert, T.,  Whelan, M.,  Using full-field measurement techniques to validate simulations of dynamic events, ICAIM 2011, Int. Conf. on Applications for Image based Measurements, Grosslaupheim, DE, 22 – 23 March 2011
  • Siebert, T., Schubach, H.-R., Standardization activities on full field optical deformation measurements, Poster at the Aerospace 11, Testing - Design  –  Manufacturing, Hamburg, DE, 04-08 April 2011
     
  • Patterson, EA, The role of experimental mechanics in validation, The International Workshop on Validation of Computational Solid Mechanics Models, Shanghai Jiao Tong University, Shanghai, PR China, 18-20 October 2011, Program and Abstract Booklet
  • Hack, E., Standards and Traceability to International Standards, The International Workshop on Validation of Computational Solid Mechanics Models, Shanghai Jiao Tong University, Shanghai, PR China, 18-20 October 2011, Program and Abstract Booklet
  • Mottershead, J., Image decomposition as a tool for validating stress analysis models, The International Workshop on Validation of Computational Solid Mechanics Models, Shanghai Jiao Tong University, Shanghai, PR China, 18-20 October 2011, Program and Abstract Booklet
  • Patterson, EA, Progress towards calibration and validation methodologies for dynamic analysis, The International Workshop on Validation of Computational Solid Mechanics Models, Shanghai Jiao Tong University, Shanghai, PR China, 18-20 October 2011, Program and Abstract Booklet
  • Lampeas, G., Validation of non-linear dynamic simulations through full field optical methods, The International Workshop on Validation of Computational Solid Mechanics Models, Shanghai Jiao Tong University, Shanghai, PR China, 18-20 October 2011, Program and Abstract Booklet
  • Hack, E., Uncertainty and its role in Calibration and Validation, The International Workshop on Validation of Computational Solid Mechanics Models, Shanghai Jiao Tong University, Shanghai, PR China, 18-20 October 2011, Program and Abstract Booklet
     
  • Hack, E., Patterson, E.A., Siebert, T., and Thalmann, R., Calibration and validation of full-field techniques,  ICEM 14, Poitiers (FR), 4-9 July 2010, EPJ Web of Conferences 6 (2010) 46003
  • Hack, E., Burguete, R.L., Siebert, T., Davighi, A., Mottershead, J., Lampeas, G., Ihle, A., Pipino, A., and Patterson, E.A., Validation of full-field techniques: discussion of experiences,  ICEM 14, Poitiers (FR), 4-9 July 2010, EPJ Web of Conferences 6 (2010)46004
  • Patki, A., Wang, V., Mottershead, J., and Patterson, E.A., Image decomposition as a tool for validating stress analysis models, ICEM 14, Poitiers (FR), 4-9 July 2010, EPJ Web of Conferences 6 (2010)46005
  • Davighi, A., Hack, E., Patterson, E.A., and Whelan, M., A reference material for dynamic displacement calibration, ICEM 14, Poitiers (FR), 4-9 July 2010, EPJ Web of Conferences 6 (2010)46006
  • Lampeas, G.,  and Siebert, T., Validation of non-linear dynamic simulations through full field optical methods, ICEM 14, Poitiers (FR), 4-9 July 2010, EPJ Web of Conferences 6 (2010) 46007
  • Feligiotti, M., Hack, E., and Lampeas, G., Methodology for assessing impact damage using integrated simulation and experimentation, ICEM 14, Poitiers (FR), 4-9 July 2010, EPJ Web of Conferences 6 (2010)46008