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18 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Shear stress of soil |
Is the capacity of soil to resist shearing stresses.
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Shear strength |
The maximum value of shear stress that can be mobilised within a soil mass. |
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The component which acts along plane ( concept of stress) |
Tangential stress |
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The normal component that acts normal to sectional plane is (concept of stress ) |
Direct stress |
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Which stress is responsible for shearing of the material and hence Referred as Shearing stress. |
Tangential stress |
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Shear resistance /shear strength of a soil is |
The property of soil that enables the soil mass to keep it's equilibrium when it's surface is not level or under any loading situation that is producing shearing stress |
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Soil derives it's shearing strength from |
1. Resistance due to interlocking of the particles. 2. Frictional resistance between the individual grains, which may be sliding friction, rolling friction or both 3. Adhesion between soil particles or cohesion. |
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Granular soil may derive their shear strength from |
Interlocking and friction |
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Cohesive soils may derive their shear strength from |
Friction and cohesion |
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Highly plastic clays as their source of shear strength is |
Cohesion only. |
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In a stressed soil mass shear failure can occur |
Along any plane |
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At any stressed point, there exist |
Three mutually perpendicular planes |
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When three mutually perpendicular planes on which there are no shearing stresses acting is called |
Principal planes. |
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The normal stresses acting on these mutually perpendicular planes are called as |
Principal stresses |
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In two dimensional stress system the major and minor principle planes occur on |
Horizontal and vertical direction. |
Diagram |
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The locus of stress coordinates ( normal and shear) for all planes through a point is |
Circle, called the Mohr circle of stress. |
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When principle stresses are equal to each other, the radius of the mohr circle becomes |
Zero, which means that shear stresses vanish on all planes. Such a point is called ISOTROPIC point. |
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Important |
Diagram |
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