Pre-failure behaviour of reconstituted peats in triaxial compression

Muraro, S.; Jommi, C.

doi:10.1007/s11440-020-01019-2

Pre-failure behaviour of reconstituted peats in triaxial compression

Title

Pre-failure behaviour of reconstituted peats in triaxial compression

Author

Muraro, S. (TU Delft Geo-engineering)
Jommi, C. (TU Delft Geo-engineering; Politecnico di Milano)

Date

2020

Abstract

This paper discusses the results of an experimental programme designed to investigate the deviatoric behaviour of peats. The results are obtained from triaxial experiments carried out on reconstituted peat samples. The interpretation of the experimental results follows a hierarchical approach in an attempt to derive the ingredients that an elastic–plastic model for peats should contain, including the yield locus, the hardening mechanism and the flow rule. The results obtained from stress tests along different loading directions show that purely volumetric hardening is not adequate to describe the deviatoric response of peat and that a deviatoric strain-dependent component should be included. The plastic deformation mechanism also depends on the previous stress history experienced by the sample. Stress and strain path dependence of the interaction mechanisms between the peat matrix and the fibres is discussed as a possible physical reason for the observed behaviour. This work offers a relevant set of data and information to guide the rational development and the calibration of constitutive laws able to model the deviatoric behaviour of peats.

Subject

Constitutive modelling
Peat
Triaxial tests

To reference this document use:

http://resolver.tudelft.nl/uuid:2726b1da-850d-4738-a1bd-149e32ca42b3

DOI

https://doi.org/10.1007/s11440-020-01019-2

ISSN

1861-1125

Source

Acta Geotechnica, 16 (2021) (3), 789-805

Part of collection

Institutional Repository