A Regularized Inverse Framework for Stress and Strain Analysis of Viscoelastic Bodies via DIC–FEA Integration

Authors

DOI:

https://doi.org/10.31265/xqvwvr33

Abstract

A method for obtaining the strain and stress distributions in a viscoelastic body is proposed by combining digital image correlation with finite element analysis based on the principle of superposition. In this method, the boundary conditions within the measurement region are determined via inverse analysis so that the computed displacement fields match those obtained experimentally. A regularization scheme is introduced to mitigate the influence of measurement errors near the boundaries. The strain distributions are obtained simultaneously with the displacement fields. Meanwhile, the stress distributions are evaluated from the temporal evolution of the strain components, taking into account the time-dependent mechanical properties of the viscoelastic material. The effectiveness of the proposed method is demonstrated through a numerical simulation. Furthermore, as an application example, stress analyses around contact interfaces are presented. The proposed method alleviates difficulties in data processing during measurement and provides an effective approach for stress and strain analysis of viscoelastic bodies.

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Published

2026-08-26

Issue

Vol. 34 (2026): Papers presented at the Joint Conference of the 35th Nordic Rheology Society and the 14th International Conference on Mechanics of Time-Dependent Materials

Section

Polymeric Materials and Composites

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Copyright (c) 2026 Satoru Yoneyama, Yurie Rai, Keisuke Iizuka

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This work is licensed under a Creative Commons Attribution 4.0 International License.

How to Cite

[1]
S. Yoneyama, Y. Rai, and K. Iizuka, “A Regularized Inverse Framework for Stress and Strain Analysis of Viscoelastic Bodies via DIC–FEA Integration”, ATNRS, vol. 34, pp. 13–21, Aug. 2026, doi: 10.31265/xqvwvr33.