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Coefficient of Internal Friction for Soil Formula

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Coefficient of Internal Friction is a measure of the ability of a unit of rock or soil to withstand shear stress. Check FAQs

tanφ = (\frac{F s}{P})

tanφ - Coefficient of Internal Friction?F_s - Shear Force on Soil?P - Total Normal Force?

Coefficient of Internal Friction for Soil Example

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Here is how the Coefficient of Internal Friction for Soil equation looks like with Values.

Here is how the Coefficient of Internal Friction for Soil equation looks like with Units.

Here is how the Coefficient of Internal Friction for Soil equation looks like.

0.3233 = (\frac{48.5}{150})

0.3233 = (\frac{48.5N}{150N})

0.3233 = (\frac{48.5}{150})

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Coefficient of Internal Friction for Soil Solution

Follow our step by step solution on how to calculate Coefficient of Internal Friction for Soil?

FIRST Step Consider the formula

tanφ = (\frac{F s}{P})

Next Step Substitute values of Variables

∴

tanφ = (\frac{48.5N}{150N})

Next Step Prepare to Evaluate

∴

tanφ = (\frac{48.5}{150})

Next Step Evaluate

∴

tanφ = 0.323333333333333

LAST Step Rounding Answer

∴

tanφ = 0.3233

Coefficient of Internal Friction for Soil Formula Elements

Variables

Coefficient of Internal Friction

Coefficient of Internal Friction is a measure of the ability of a unit of rock or soil to withstand shear stress.

Symbol: tanφ

Measurement: NAUnit: Unitless

Note: Value should be greater than 0.

Formulas to find Coefficient of Internal Friction

Shear Force on Soil

Shear Force on Soil is the force which causes shear deformation to occur in the shear plane in soil mechanics.

Symbol: F_s

Measurement: ForceUnit: N

Note: Value can be positive or negative.

Formulas to find Shear Force on Soil

Total Normal Force

Total normal force acting at the base of the slice.

Symbol: P

Measurement: ForceUnit: N

Note: Value should be greater than 0.

Formulas to find Total Normal Force

Other formulas in Atterberg Limits category

Go Plasticity Index of Soil

I p = W l - W p

Go Plastic Limit of Soil given Plasticity Index

W p = W l - I p

Go Liquid Limit of Soil given Plasticity Index

W l = I p + W p

Go Liquidity Index of Soil

I l = \frac{w - W p}{I p}

How to Evaluate Coefficient of Internal Friction for Soil?

Coefficient of Internal Friction for Soil evaluator uses Coefficient of Internal Friction = (Shear Force on Soil/Total Normal Force) to evaluate the Coefficient of Internal Friction, The Coefficient of Internal Friction for Soil is defined as the ratio of the shear stress to the normal stress at failure. Coefficient of Internal Friction is denoted by tanφ symbol.

How to evaluate Coefficient of Internal Friction for Soil using this online evaluator? To use this online evaluator for Coefficient of Internal Friction for Soil, enter Shear Force on Soil (F_s) & Total Normal Force (P) and hit the calculate button.

FAQs on Coefficient of Internal Friction for Soil

What is the formula to find Coefficient of Internal Friction for Soil?

The formula of Coefficient of Internal Friction for Soil is expressed as Coefficient of Internal Friction = (Shear Force on Soil/Total Normal Force). Here is an example- 0.323333 = (48.5/150).

How to calculate Coefficient of Internal Friction for Soil?

With Shear Force on Soil (F_s) & Total Normal Force (P) we can find Coefficient of Internal Friction for Soil using the formula - Coefficient of Internal Friction = (Shear Force on Soil/Total Normal Force).

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