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Mohr-Coulomb Failure Criterion for Shear Strength Video Lecture | Soil Mechanics - Civil Engineering (CE)

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1. What is the Mohr-Coulomb failure criterion for shear strength in civil engineering?

Ans. The Mohr-Coulomb failure criterion is a mathematical equation used to determine the shear strength of materials in civil engineering. It relates the shear stress and normal stress on a plane to the cohesion and angle of internal friction of the material.

2. How is the Mohr-Coulomb failure criterion used in civil engineering?

Ans. In civil engineering, the Mohr-Coulomb failure criterion is used to analyze and design structures and foundations. It helps determine the stability and strength of soils and rocks under various loading conditions, such as during the construction of buildings, dams, or slopes.

3. What are the parameters involved in the Mohr-Coulomb failure criterion?

Ans. The parameters involved in the Mohr-Coulomb failure criterion are cohesion (c) and angle of internal friction (φ). Cohesion represents the shear strength of the material in the absence of normal stress, while the angle of internal friction determines the material's response to shearing under normal stress.

4. How is the Mohr-Coulomb failure criterion equation derived?

Ans. The Mohr-Coulomb failure criterion equation is derived based on the assumption that failure occurs when the shear stress on a plane reaches the maximum shear strength. It is mathematically obtained by considering the equilibrium of forces and moments acting on an element of soil or rock.

5. What are the limitations of the Mohr-Coulomb failure criterion in civil engineering?

Ans. The Mohr-Coulomb failure criterion has some limitations in civil engineering. It assumes that the failure envelope is linear and does not account for strain rate effects, pore water pressure, and other factors that can influence shear strength. Additionally, it may not accurately represent the behavior of all types of soils and rocks, requiring other failure criteria for certain materials.

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Sep 08, 2025 Last updated

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	Soil Mechanics 30 videos\|126 docs\|74 tests

Soil Mechanics

30 videos|126 docs|74 tests

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