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Evaluation on Tensile Behavior Characteristics of Undisturbed Loess

Evaluation on Tensile Behavior Characteristics of Undisturbed Loess

Authors :
Shixin He
Haibo Bai
Zhiwei Xu
Source :
Energies, Vol 11, Iss 8, p 1974 (2018)
Publication Year :
2018
Publisher :
MDPI AG, 2018.

Abstract

Tensile strength is one significant parameter involved in tensile fracture in soil mechanics. In this paper, a stress-controlled, uniaxial, direct-tension test apparatus was developed to investigate the tensile properties of soils. A limited number of investigations have examined the impact of anisotropy and loading interval on the tensile strength of undisturbed loess. The deformation and strains generated were also examined during the tests. It was revealed that anisotropy was an important factor affecting tensile strength of undisturbed loess, and the effect of loading interval on tensile strength significantly depended on water content. It was negligible while the water content was below the plastic limit. However, when the water content was above the plastic limit, the loading interval not only affected the tensile strength, but also the failure displacement and stiffness response of the soil. Two patterns of tensile fracture were summarized and discussed. Moreover, an empirical constitutive relation was proposed to describe the stress-strain relationship of undisturbed loess and its robustness was validated by the experimental data.

Details

Language :
English
ISSN :
19961073
Volume :
11
Issue :
8
Database :
Directory of Open Access Journals
Journal :
Energies
Publication Type :
Academic Journal
Accession number :
edsdoj.84d33e55db8046fcbd9c1cbbe76daf03
Document Type :
article
Full Text :
https://doi.org/10.3390/en11081974