Improving the validation of finite element models with quantitative full-field strain comparisons

2012 ◽  
Vol 45 (8) ◽  
pp. 1498-1506 ◽  
Author(s):  
F. Gröning ◽  
J.A. Bright ◽  
M.J. Fagan ◽  
P. O'Higgins
Keyword(s):  
Finite Element ◽  
Field Strain ◽  
Finite Element Models ◽  
Full Field

scholarly journals The Application of Digital Volume Correlation (DVC) to Evaluate Strain Predictions Generated by Finite Element Models of the Osteoarthritic Humeral Head

2020 ◽  
Vol 48 (12) ◽  
pp. 2859-2869 ◽  
Author(s):  
Jonathan Kusins ◽  
Nikolas Knowles ◽  
Melanie Columbus ◽  
Sara Oliviero ◽  
Enrico Dall’Ara ◽  
...  
Keyword(s):  
Finite Element ◽  
Humeral Head ◽  
Total Shoulder Arthroplasty ◽  
Mechanical Strain ◽  
Digital Volume Correlation ◽  
Finite Element Models ◽  
Full Field ◽  
Loaded State ◽  
Microct Imaging ◽  
Experimental Strains

AbstractContinuum-level finite element models (FEMs) of the humerus offer the ability to evaluate joint replacement designs preclinically; however, experimental validation of these models is critical to ensure accuracy. The objective of the current study was to quantify experimental full-field strain magnitudes within osteoarthritic (OA) humeral heads by combining mechanical loading with volumetric microCT imaging and digital volume correlation (DVC). The experimental data was used to evaluate the accuracy of corresponding FEMs. Six OA humeral head osteotomies were harvested from patients being treated with total shoulder arthroplasty and mechanical testing was performed within a microCT scanner. MicroCT images (33.5 µm isotropic voxels) were obtained in a pre- and post-loaded state and BoneDVC was used to quantify full-field experimental strains (≈ 1 mm nodal spacing, accuracy = 351 µstrain, precision = 518 µstrain). Continuum-level FEMs with two types of boundary conditions (BCs) were simulated: DVC-driven and force-driven. Accuracy of the FEMs was found to be sensitive to the BC simulated with better agreement found with the use of DVC-driven BCs (slope = 0.83, r2 = 0.80) compared to force-driven BCs (slope = 0.22, r2 = 0.12). This study quantified mechanical strain distributions within OA trabecular bone and demonstrated the importance of BCs to ensure the accuracy of predictions generated by corresponding FEMs.

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

2020 ◽  
Vol 77 ◽  
pp. 125-129
Author(s):  
Alexander Abel ◽  
Stephanie L. Kahmann ◽  
Stephen Mellon ◽  
Manfred Staat ◽  
Alexander Jung
Keyword(s):  
Finite Element ◽  
Open Source ◽  
Three Dimensional ◽  
Field Measurements ◽  
Finite Element Models ◽  
Full Field ◽  
Open Source Tool

scholarly journals Shape features and finite element model updating from full-field strain data

2011 ◽  
Vol 48 (11-12) ◽  
pp. 1644-1657 ◽  
Author(s):  
Weizhuo Wang ◽  
John E. Mottershead ◽  
Christopher M. Sebastian ◽  
Eann A. Patterson
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Model Updating ◽  
Element Model ◽  
Field Strain ◽  
Finite Element Model Updating ◽  
Shape Features ◽  
Full Field ◽  
Strain Data

Mapping 3D breast lesions from full-field digital mammograms using subject-specific finite element models

2017 ◽  
Author(s):  
E. García ◽  
A. Oliver ◽  
O. Diaz ◽  
Y. Diez ◽  
A. Gubern-Mérida ◽  
...  
Keyword(s):  
Finite Element ◽  
Breast Lesions ◽  
Finite Element Models ◽  
Full Field ◽  
Subject Specific

scholarly journals How accurately can subject-specific finite element models predict strains and strength of human femora? Investigation using full-field measurements

2016 ◽  
Vol 49 (5) ◽  
pp. 802-806 ◽  
Author(s):  
Lorenzo Grassi ◽  
Sami P. Väänänen ◽  
Matti Ristinmaa ◽  
Jukka S. Jurvelin ◽  
Hanna Isaksson
Keyword(s):  
Finite Element ◽  
Field Measurements ◽  
Finite Element Models ◽  
Full Field ◽  
Subject Specific

Integrating thermoelastic and numerical stress methods for reliable analysis

2003 ◽  
Vol 38 (4) ◽  
pp. 303-312 ◽  
Author(s):  
R. J Greene ◽  
E. A Patterson
Keyword(s):  
Finite Element ◽  
Focal Plane ◽  
Thermoelastic Stress ◽  
Finite Element Simulations ◽  
Finite Element Models ◽  
Thermoelastic Stress Analysis ◽  
Full Field ◽  
Valuable Method ◽  
Selection Of ◽  
Good Agreement

Two case studies are presented which employ the experimental technique of thermoelastic stress analysis in order to verify finite element models of components from an off-road bicycle. The design of the finite element simulations is detailed and selection of elements and loading conditions justified. The use of a thermoelastic detector with a focal plane array allows full-field maps of surface stress to be determined, which are subsequently used in an evaluation of the finite element simulations. Good agreement is shown between the simulations and the experimental data, and the paper concludes that this current generation of thermoelastic detectors provides a valuable method of validation for complex finite element models.

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