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Updated: Aug 26, 2025

Intermediate Strain Rate Material Characterization with Digital Image Correlation
Published on: March 1, 2019
Comparison of two small-strain concepts: ISA and intergranular strain applied to barodesy
Merita Tafili1, Gertraud Medicus2, Manuel Bode2
1Ruhr-University Bochum, Chair of Soil Mechanics, Foundation Engineering and Environmental Geotechnics, Universitätsstr. 150, 44801 Bochum, Germany.
Abstract:
The intergranular strain concept (IGS) and intergranular strain anisotropy formulation (ISA) are state of the art extensions to describe small-strain effects. The main conceptional difference between ISA and IGS is the purely elastic strain range introduced by ISA. In addition, the ISA formulation used in this article includes an additional state variable in order to reduce accumulation effects for cyclic loading with a larger number of repetitive cycles. Barodesy is enhanced here with ISA to improve its small-strain predictions. The performance of this new model is compared with barodesy enhanced with IGS. It turned out that the small-strain extensions do not negatively influence predictions under monotonic loading. Differences between ISA and ISG are only remarkable for very small-strain cycles and even there they are negligible for certain parameter values.
Supplementary Information:
The online version contains supplementary material available at 10.1007/s11440-022-01454-3.
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