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Direct Pointwise Comparison of FE Predictions to StereoDIC Measurements: Developments and Validation Using Double Edge-Notched Tensile Specimen

Troy Myers1, Michael A. Sutton1,*, Hubert Schreier2, Alistair Tofts2, Sreehari Rajan Kattil1

1 Department of Mechanical Engineering, University of South Carolina, Columbia, SC, 29208, USA
2 Correlated Solutions Incorporated, 121 Dutchman Blvd, Columbia, SC, 29063, USA

* Corresponding Author: Michael A. Sutton. Email: email

Computer Modeling in Engineering & Sciences 2024, 140(2), 1263-1298. https://doi.org/10.32604/cmes.2024.048743

Abstract

To compare finite element analysis (FEA) predictions and stereovision digital image correlation (StereoDIC) strain measurements at the same spatial positions throughout a region of interest, a field comparison procedure is developed. The procedure includes (a) conversion of the finite element data into a triangular mesh, (b) selection of a common coordinate system, (c) determination of the rigid body transformation to place both measurements and FEA data in the same system and (d) interpolation of the FEA nodal information to the same spatial locations as the StereoDIC measurements using barycentric coordinates. For an aluminum Al-6061 double edge notched tensile specimen, FEA results are obtained using both the von Mises isotropic yield criterion and Hill’s quadratic anisotropic yield criterion, with the unknown Hill model parameters determined using full-field specimen strain measurements for the nominally plane stress specimen. Using Hill’s quadratic anisotropic yield criterion, the point-by-point comparison of experimentally based full-field strains and stresses to finite element predictions are shown to be in excellent agreement, confirming the effectiveness of the field comparison process.

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APA Style
Myers, T., Sutton, M.A., Schreier, H., Tofts, A., Kattil, S.R. (2024). Direct pointwise comparison of FE predictions to stereodic measurements: developments and validation using double edge-notched tensile specimen. Computer Modeling in Engineering & Sciences, 140(2), 1263-1298. https://doi.org/10.32604/cmes.2024.048743
Vancouver Style
Myers T, Sutton MA, Schreier H, Tofts A, Kattil SR. Direct pointwise comparison of FE predictions to stereodic measurements: developments and validation using double edge-notched tensile specimen. Comput Model Eng Sci. 2024;140(2):1263-1298 https://doi.org/10.32604/cmes.2024.048743
IEEE Style
T. Myers, M.A. Sutton, H. Schreier, A. Tofts, and S.R. Kattil "Direct Pointwise Comparison of FE Predictions to StereoDIC Measurements: Developments and Validation Using Double Edge-Notched Tensile Specimen," Comput. Model. Eng. Sci., vol. 140, no. 2, pp. 1263-1298. 2024. https://doi.org/10.32604/cmes.2024.048743



cc This work is licensed under a Creative Commons Attribution 4.0 International License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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