2024 Volume 24 Issue 3 Pages 105-111
In this study, we propose a method to obtain the strain and stress distributions of a viscoelastic body by combining digital image correlation and finite element analysis, based on the principle of superposition. In this method, the boundary conditions of the measurement area are determined by inverse analysis so that the displacement distributions as those obtained by measurements are obtained. A regularization scheme is introduced to reduce the influence of measurement errors near boundaries. The strain distributions are simultaneously obtained with the displacements. Meanwhile, the stress distributions are obtained from the variation of the strain components by taking into account the time-dependent mechanical properties of the viscoelastic body. The effectiveness of the proposed stress analysis method for viscoelastic bodies is demonstrated through simulation. Furthermore, as an example of the application of the proposed method, the stress analyses around the contact surfaces are shown. The proposed method can overcome difficulties of data processing in measurement and is effective for stress and strain analysis of viscoelastic bodies.
