Structural mechanics and materials
Abstract
Abstract
A theoretical analysis of hollow-cylinder stability on the basis of the bifurcation theory is presented and the predicted scale effect with respect to the hollow cylinder inner-hole diameter is compared with experimental data of initial failure of Berea and Castlegate sandstone hollow cylinders. The two-dimensional analysis employs a Cosserat-Mohr-Coulomb flow theory of elastoplasticity model with friction hardening/cohesion softening calibrated on conventional triaxial compression test data for the two sandstones. The sensitivity of the stability predictions is evaluated by considering: (a) variations in the rate of cohesion softening, (b) two hollow cylinder outer-to-inner diameter ratios, and (c) loading configuration effects, that is external radial stress increase versus internal radial stress decrease under constant external radial stress.
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@article{Ppamichos2026Size,
title = {Size dependency of Castlegate and Berea sandstone hollow-cylinder strength on the basis of bifurcation theory},
author = {E. Päpamichos and P. J. van den Hoek},
year = {2026},
doi = {10.1201/9781003761365-52},
url = {https://doi.org/10.1201/9781003761365-52}
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