Engineering

How to Calculate and Solve for Fracture Toughness Design Stress | Fracture

Last Updated on June 4, 2024

The image of fracture toughness design stress is represented below. Four essential parameters are needed to calculate fracture toughness design stress: the Factor of Safety (N), the Applied Load Constant (Y), the Critical Wall Stress (σy), and the Maximum Allowable Flow Length (ac).

The formula for calculating fracture toughness design stress:

KIC = Y(σy/N)√(πac)

KIC = Fracture Toughness Design Stress
Y = Applied Load Constant
N = Factor of Safety
σy = Critical Wall Stress
ac = Maximum Allowable Flow Length

Given an example;
Find the fracture toughness design stress when the applied load constant is 7, the factor of safety is 4, the critical wall stress is 2 and the maximum allowable flow length is 8.

This implies that;

Y = Applied Load Constant = 7
N = Factor of Safety = 4
σy = Critical Wall Stress = 2
ac = Maximum Allowable Flow Length = 8

KIC = Y(σy/N)√(πac)
KIC = 4(2/7)√(π(8))
That is, KIC = 4(0.285)√(25.132)
KIC = 4(0.28)(5.013)
KIC = 5.729

Therefore, the fracture toughness design stress is 5.729 J/cm².

Read more: How to Calculate and Solve for Fracture Toughness | Fracture

How to Calculate Fracture Toughness Design Stress With Nickzom Calculator

Nickzom Calculator – The Calculator Encyclopedia is capable of calculating the fracture toughness design stress.

To get the answer and workings of the fracture toughness design stress using the Nickzom Calculator – The Calculator Encyclopedia. First, you need to obtain the app.

You can get this app via any of these means:

Web – https://www.nickzom.org/calculator-plus

To get access to the professional version via web, you need to register and subscribe to have utter access to all functionalities.
You can also try the demo version via https://www.nickzom.org/calculator

Android (Paid) – https://play.google.com/store/apps/details?id=org.nickzom.nickzomcalculator
Android (Free) – https://play.google.com/store/apps/details?id=com.nickzom.nickzomcalculator

Apple (Paid) – https://itunes.apple.com/us/app/nickzom-calculator/id1331162702?mt=8
Once, you have obtained the calculator encyclopedia app, proceed to the Calculator Map, then click on Materials and Metallurgical under Engineering.

Now, Click on Fracture under Materials and Metallurgical

Now, Click on Fracture Toughness Design Stress under Fracture

The screenshot below displays the page or activity to enter your values, to get the answer for the fracture toughness design stress according to the respective parameter which is the Factor of Safety (N), Applied Load Constant (Y), Critical Wall Stress (σyand Maximum Allowable Flow Length (ac).

Now, enter the values appropriately and accordingly for the parameters as required by the Factor of Safety (N) is 7, Applied Load Constant (Y) is 4, Critical Wall Stress (σy) is 2 and Maximum Allowable Flow Length (ac) is 8.

How to Calculate and Solve for Fracture Toughness Design Stress | Fracture

Finally, Click on Calculate

How to Calculate and Solve for Fracture Toughness Design Stress | Fracture
How to Calculate and Solve for Fracture Toughness Design Stress | Fracture

As you can see from the screenshot above, Nickzom Calculator– The Calculator Encyclopedia solves for the fracture toughness design stress and presents the formula, workings and steps too.

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