Chapter
Apr 26, 2012
Study of Interparticle Ultimate Shear Stress in Soils
Authors: Jeffery C. Chang [email protected], Jason Y. Wu [email protected], and Mingshu Lee [email protected]Author Affiliations
Publication: Instrumentation, Testing, and Modeling of Soil and Rock Behavior
Abstract
The plus sign in the Mohr-Coulomb's equation conceals an inherent hypothesis. According to the principle of superposition of forces in physics, it expresses that the shear stresses contributed by the cohesions and the frictions are occurring on a shear plane simultaneously. However, such assumption has never been questioned since the application of this equation in 1776. This paper proposes that before the combination of any two types of shear stress, they shall be examined if they are identical physical events with the same spacetime coordinates. This research conducts a series of stress-controlled and strain-controlled direct shear tests to verify this assumption. Test results have shown that both cohesion and frictional resistance occurred neither simultaneously nor in the same space. In conclusion, for a given failure plane of a soil, it is likely to occur only one type of shear stress under a physical spacetime.
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Copyright
© 2011 American Society of Civil Engineers.
History
Published online: Apr 26, 2012
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ASCE Technical Topics:
- Continuum mechanics
- Dynamics (solid mechanics)
- Engineering fundamentals
- Engineering mechanics
- Forces (type)
- Friction
- Geomechanics
- Geotechnical engineering
- Laboratory tests
- Material mechanics
- Materials engineering
- Shear forces
- Shear stress
- Shear tests
- Soil mechanics
- Soil properties
- Soil stress
- Solid mechanics
- Strain
- Stress (by type)
- Stress analysis
- Stress strain relations
- Structural analysis
- Structural engineering
- Tests (by type)
Authors
Affiliations
General Manger, CUC Engineering Consultant Co., Ltd., 2B, No.11, Li-Ming Road, Hsin-Tien, Taipei County, Taiwan, ROC 23155.E-mail: [email protected]
Associate Professor, Department of Civil Engineering, Chung Hua University, 707 Wufu Road, Hsinchu, Taiwan, ROC 30012.E-mail: [email protected]
Manger, C & M Hi-Tech Engineering Co., Ltd., 2B, No.11, Li-Ming Road, 231 Hsin-Tien, Taipei County, Taiwan, ROC 23155.E-mail: [email protected]
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