## < ⎙ 6 Other formulas that you can solve using the same Inputs

Velocity ratio of belt in terms of creep of belt
Velocity ratio=(Diameter of the driver*(Young's Modulus+sqrt(Stress in the belt on the slack side of belt)))/(Diameter of the follower*(Young's Modulus+sqrt(Stress in the belt on the tight side of belt))) GO
Thermal stress of a material
Thermal stress=(Young's Modulus*Coefficient of Linear Thermal expansion*Temperature Difference)/(Initial length) GO
Fracture toughness
Fracture toughness=Dimensionless parameter in fracture toughness*Applied stress*sqrt(pi*Crack Length) GO
Stress concentration factor
Stress concentration factor=2*sqrt(Crack Length/Radius of curvature) GO
Modulus of resilience
Modulus of resilience=Yield Strength^2/(2*Young's Modulus) GO
Strain Energy if applied tension load is given
Strain Energy=Force^2*Length/(2*Area*Young's Modulus) GO

### Critical stress for crack propagation Formula

Critical stress=sqrt(2*Young's Modulus*Specific surface energy/(pi*Crack Length))
More formulas
Engineering stress GO
Engineering strain GO
ASTM grain size number to Number of grains GO
Percent elongation GO
Percent reduction in area GO
True strain GO
Modulus of resilience GO
True stress GO
True strain from Engineering strain GO
Strain hardening exponent GO
Tensile strength from Brinell hardness GO
Brinell hardness GO
Vickers hardness GO
Knoop hardness GO
Resolved shear stress GO
Safe stress GO
Percent cold work GO
Stress concentration factor GO
Maximum stress at crack tip GO
Mean stress of stress cycle (fatigue) GO
Range of stress (fatigue) GO
Stress amplitude (fatigue) GO
Stress ratio (fatigue) GO
Maximum shear stress from Tresca criterion GO
Maximum shear stress from von mises criterion GO
Hall - Petch Relation GO
Fracture toughness GO

## Cracks in brittle materials

All brittle materials contain a population of small cracks that have a range of sizes, geometries, and orientations. When the magnitude of a tensile stress at the tip of one of these flaws exceeds the value of this critical stress, a crack forms and then propagates, which results in fracture.

## How to Calculate Critical stress for crack propagation?

Critical stress for crack propagation calculator uses Critical stress=sqrt(2*Young's Modulus*Specific surface energy/(pi*Crack Length)) to calculate the Critical stress, Critical stress for crack propagation is the minimum stress required for propagation of crack in a brittle material. Critical stress and is denoted by σc symbol.

How to calculate Critical stress for crack propagation using this online calculator? To use this online calculator for Critical stress for crack propagation, enter Young's Modulus (E), Crack Length (a) and Specific surface energy s) and hit the calculate button. Here is how the Critical stress for crack propagation calculation can be explained with given input values -> 43.70194 = sqrt(2*100000000000*0.3/(pi*1E-05)).

### FAQ

What is Critical stress for crack propagation?
Critical stress for crack propagation is the minimum stress required for propagation of crack in a brittle material and is represented as σc=sqrt(2*E*γs/(pi*a)) or Critical stress=sqrt(2*Young's Modulus*Specific surface energy/(pi*Crack Length)). Young's Modulus which can also be called elastic modulus is a mechanical property of linear elastic solid substances. It describes the relationship between stress (force per unit area) and strain (proportional deformation in an object), Crack length represents the length of a surface crack, or half of the length of an internal crack and Specific surface energy is the surface energy needed for creation of new surface during crack propagation in a brittle material.
How to calculate Critical stress for crack propagation?
Critical stress for crack propagation is the minimum stress required for propagation of crack in a brittle material is calculated using Critical stress=sqrt(2*Young's Modulus*Specific surface energy/(pi*Crack Length)). To calculate Critical stress for crack propagation, you need Young's Modulus (E), Crack Length (a) and Specific surface energy s). With our tool, you need to enter the respective value for Young's Modulus, Crack Length and Specific surface energy and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.
Let Others Know