Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
State-dependent behavior of weathered sands incorporating progressive particle breakage in drained triaxial tests
https://orcid.org/http://orcid.org/0000-0001-9616-7099
This paper presents an experimental study on state-dependent behavior of weathered sands incorporating progressive particle breakage by a number of drained triaxial tests to interpret the characteristics of particle breakage, the friction–dilatancy behavior, the critical-state behavior, and the state-dependent dilatancy. Weathered sands were pre-produced by temperature weathering under the weathering number N = 0, 20, and 40 within a designated range of temperatures (− 20 °C and + 110 °C). Particle breakage was quantified by Hardin’s relative breakage. Particle breakage increased with increasing axial strain, confining pressure, or weathering number. For a given initial confining pressure, a characteristic void ratio of sand existed to cause a maximum particle breakage in comparison with looser or denser void ratio for silica sand no. 3 N = 0. However, with increasing weathering number N, e.g., N = 20 and N = 40, particle breakage increased while decreasing void ratio. The characteristic void ratio of sand yielding the maximum particle breakage was also state dependent. A hyperbolic model was proposed to correlate relative breakage with plastic work per unit volume, showing more particle breakage in weathered sands with larger weathering number. Particle breakage impaired the peak-state friction resistance and dilatancy of weathered sands. For a given initial void ratio, particle breakage caused a v-shape change of peak-state basic friction angle. However, for a given initial confining pressure, the evolution of peak-state basic friction angle against particle breakage depended on the initial void ratio of sand. In the q-p′ plane, particle breakage rotated anticlockwise the dilatancy lines of weathered sands, but rotated clockwise the failure lines of weathered sands. In the e-p′α=0.7 plane, particle breakage resulted in downward translation and clockwise rotation of critical-state lines of weathered sands. In the q-p′ plane, particle breakage caused up-convex nonlinearity of critical-state lines of weathered sands that evolved diversely against weathering number. Particle breakage resulted in rotation and translation of the linear relation of peak-state dilatancy and peak-state stress ratio or peak-state state parameter. A friction–dilatancy relation was proposed to interpret the behavior of weathered sands incorporating progressive particle breakage.
State-dependent behavior of weathered sands incorporating progressive particle breakage in drained triaxial tests
https://orcid.org/http://orcid.org/0000-0001-9616-7099
This paper presents an experimental study on state-dependent behavior of weathered sands incorporating progressive particle breakage by a number of drained triaxial tests to interpret the characteristics of particle breakage, the friction–dilatancy behavior, the critical-state behavior, and the state-dependent dilatancy. Weathered sands were pre-produced by temperature weathering under the weathering number N = 0, 20, and 40 within a designated range of temperatures (− 20 °C and + 110 °C). Particle breakage was quantified by Hardin’s relative breakage. Particle breakage increased with increasing axial strain, confining pressure, or weathering number. For a given initial confining pressure, a characteristic void ratio of sand existed to cause a maximum particle breakage in comparison with looser or denser void ratio for silica sand no. 3 N = 0. However, with increasing weathering number N, e.g., N = 20 and N = 40, particle breakage increased while decreasing void ratio. The characteristic void ratio of sand yielding the maximum particle breakage was also state dependent. A hyperbolic model was proposed to correlate relative breakage with plastic work per unit volume, showing more particle breakage in weathered sands with larger weathering number. Particle breakage impaired the peak-state friction resistance and dilatancy of weathered sands. For a given initial void ratio, particle breakage caused a v-shape change of peak-state basic friction angle. However, for a given initial confining pressure, the evolution of peak-state basic friction angle against particle breakage depended on the initial void ratio of sand. In the q-p′ plane, particle breakage rotated anticlockwise the dilatancy lines of weathered sands, but rotated clockwise the failure lines of weathered sands. In the e-p′α=0.7 plane, particle breakage resulted in downward translation and clockwise rotation of critical-state lines of weathered sands. In the q-p′ plane, particle breakage caused up-convex nonlinearity of critical-state lines of weathered sands that evolved diversely against weathering number. Particle breakage resulted in rotation and translation of the linear relation of peak-state dilatancy and peak-state stress ratio or peak-state state parameter. A friction–dilatancy relation was proposed to interpret the behavior of weathered sands incorporating progressive particle breakage.
State-dependent behavior of weathered sands incorporating progressive particle breakage in drained triaxial tests
https://orcid.org/http://orcid.org/0000-0001-9616-7099
This paper presents an experimental study on state-dependent behavior of weathered sands incorporating progressive particle breakage by a number of drained triaxial tests to interpret the characteristics of particle breakage, the friction–dilatancy behavior, the critical-state behavior, and the state-dependent dilatancy. Weathered sands were pre-produced by temperature weathering under the weathering number N = 0, 20, and 40 within a designated range of temperatures (− 20 °C and + 110 °C). Particle breakage was quantified by Hardin’s relative breakage. Particle breakage increased with increasing axial strain, confining pressure, or weathering number. For a given initial confining pressure, a characteristic void ratio of sand existed to cause a maximum particle breakage in comparison with looser or denser void ratio for silica sand no. 3 N = 0. However, with increasing weathering number N, e.g., N = 20 and N = 40, particle breakage increased while decreasing void ratio. The characteristic void ratio of sand yielding the maximum particle breakage was also state dependent. A hyperbolic model was proposed to correlate relative breakage with plastic work per unit volume, showing more particle breakage in weathered sands with larger weathering number. Particle breakage impaired the peak-state friction resistance and dilatancy of weathered sands. For a given initial void ratio, particle breakage caused a v-shape change of peak-state basic friction angle. However, for a given initial confining pressure, the evolution of peak-state basic friction angle against particle breakage depended on the initial void ratio of sand. In the q-p′ plane, particle breakage rotated anticlockwise the dilatancy lines of weathered sands, but rotated clockwise the failure lines of weathered sands. In the e-p′α=0.7 plane, particle breakage resulted in downward translation and clockwise rotation of critical-state lines of weathered sands. In the q-p′ plane, particle breakage caused up-convex nonlinearity of critical-state lines of weathered sands that evolved diversely against weathering number. Particle breakage resulted in rotation and translation of the linear relation of peak-state dilatancy and peak-state stress ratio or peak-state state parameter. A friction–dilatancy relation was proposed to interpret the behavior of weathered sands incorporating progressive particle breakage.
State-dependent behavior of weathered sands incorporating progressive particle breakage in drained triaxial tests
Acta Geotech.
Yu, Fangwei (Autor:in)
Acta Geotechnica ; 18 ; 3955-3976
01.08.2023
22 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Dilatancy , Friction , Grain size , Particle breakage , Sands , State parameter , Triaxial tests Engineering , Geoengineering, Foundations, Hydraulics , Solid Mechanics , Geotechnical Engineering & Applied Earth Sciences , Soil Science & Conservation , Soft and Granular Matter, Complex Fluids and Microfluidics
Particle Breakage and the Drained Shear Behavior of Sands
| Online Contents | 2017
Strength of Weakly Cemented Sands from Drained Multistage Triaxial Tests
| British Library Online Contents | 2011