An open-source tool for the validation of finite element models using three-dimensional full-field measurements

Medical Engineering & Physics, vol. 77, pp. 125–129

Abstract

Three-dimensional (3D) full-field measurements provide a comprehensive and accurate validation of finite element (FE) models. For the validation, the result of the model and measurements are compared based on two respective point-sets and this requires the point-sets to be registered in one coordinate system. Point-set registration is a non-convex optimization problem that has widely been solved by the ordinary iterative closest point algorithm. However, this approach necessitates a good initialization without which it easily returns a local optimum, i.e. an erroneous registration. The globally optimal iterative closest point (Go-ICP) algorithm has overcome this drawback and forms the basis for the presented open-source tool that can be used for the validation of FE models using 3D full-field measurements. The capability of the tool is demonstrated using an application example from the field of biomechanics. Methodological problems that arise in real-world data and the respective implemented solution approaches are discussed.

Authors 5

1. Alexander Abel Aachen Institute of Bioengineering

   FH Aachen

   Affiliation as printed

   Institute of Bioengineering, FH Aachen University of Applied Sciences, Heinrich-Mußmann Straße 1, 52428 Jülich, Germany

2. Stephanie Lucina Kahmann Aachen Institute of Bioengineering

   University of Oxford · FH Aachen

   Affiliation as printed

   Institute of Bioengineering, FH Aachen University of Applied Sciences, Heinrich-Mußmann Straße 1, 52428 Jülich, Germany; Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Windmill Road, Oxford OX3 7LD, United Kingdom

   Institute of Bioengineering, FH Aachen University of Applied Sciences, Heinrich-Mußmann Straße 1, 52428 Jülich, Germany

   Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Windmill Road, Oxford OX3 7LD, United Kingdom

3. Stephen Mellon

   University of Oxford

   Affiliation as printed

   Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Windmill Road, Oxford OX3 7LD, United Kingdom

4. Manfred Staat Aachen Institute of Bioengineering

   FH Aachen

   Affiliation as printed

   Institute of Bioengineering, FH Aachen University of Applied Sciences, Heinrich-Mußmann Straße 1, 52428 Jülich, Germany

5. Alexander Jung corresponding Aachen Institute of Bioengineering

   University of Oxford · FH Aachen

   Affiliation as printed

   Institute of Bioengineering, FH Aachen University of Applied Sciences, Heinrich-Mußmann Straße 1, 52428 Jülich, Germany; Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Windmill Road, Oxford OX3 7LD, United Kingdom. Electronic address: a.jung@fh-aachen.de

   Institute of Bioengineering, FH Aachen University of Applied Sciences, Heinrich-Mußmann Straße 1, 52428 Jülich, Germany

   Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Windmill Road, Oxford OX3 7LD, United Kingdom