# How to Calculate and Solve for Design Stress due to Fracture | Fracture

The image of design stress due to fracture is represented below. To calculate design stress due to fracture, three essential parameters are needed and these parameters are Fracture Toughness (KIC), Applied Load Constant (Y)Â and Length of Crack on Surface (a).

### The formula for calculating design stress due to fracture:

ÏƒcÂ =Â KIC/Yâˆš(Ï€a)

ÏƒcÂ = Design Stress due to Fracture
KICÂ = Fracture Toughness
a = Length of Crack on Surface

Given an example;
Find the design stress due to fracture when the fracture toughness is 12, the applied load constant is 6 and length of crack on surface is 2.

This implies that;

KIC = Fracture Toughness = 12
Y = Applied Load Constant = 6
a = Length of Crack on Surface = 2

ÏƒcÂ =Â KIC/Yâˆš(Ï€a)
That is, ÏƒcÂ =Â 12/(6)âˆš(Ï€(2))
ÏƒcÂ =Â 12/(6)âˆš(6.28)
ÏƒcÂ =Â 12/(6)(2.50)
Then, ÏƒcÂ =Â 12/(15.039)
Ïƒc = 0.797

Therefore, theÂ design stress due to fractureÂ isÂ 0.797 Pa.

### How to Calculate Design Stress due to Fracture Using Nickzom Calculator

Nickzom Calculator â€“Â The Calculator Encyclopedia is capable of calculating the design stress due to fracture.

To get the answer and workings of the design stress due to fracture using the Nickzom Calculator â€“ The Calculator Encyclopedia.Â First, you need to obtain the app.

You can get this app via any of these means:

You can also try theÂ demoÂ version viaÂ https://www.nickzom.org/calculator

Apple (Paid)Â â€“Â https://itunes.apple.com/us/app/nickzom-calculator/id1331162702?mt=8
Once, you have obtained the calculator encyclopedia app, proceed to theÂ Calculator Map,Â then click onÂ Materials and MetallurgicalÂ underÂ Engineering.

Now, Click onÂ FractureÂ underÂ Materials and Metallurgical

Now, Click on Design Stress due to FractureÂ underÂ Fracture

The screenshot below displays the page or activity to enter your values, to get the answer for the design stress due to fracture according to the respective parameter which is the Fracture Toughness (KIC), Applied Load Constant (Y)Â and Length of Crack on Surface (a).

Now, enter the values appropriately and accordingly for the parameters as required by the Fracture Toughness (KIC) is 12, Applied Load Constant (Y) is 6 and Length of Crack on Surface (a) is 2.

Finally, Click on Calculate

As you can see fromÂ the screenshot above,Â Nickzom Calculatorâ€“ The Calculator Encyclopedia solves for the design stress due to fracture and presents the formula, workings and steps too.