How to Calculate and Solve for Maximum Allowable Flow Length | Fracture

Last Updated on December 14, 2022

The image above represents maximum allowable flow length.

To compute for maximum allowable flow length, three essential parameters are needed and these parameters are Fracture Toughness (KIC), Applied Load Constant (Y) and Stress (σ).

The formula for calculating maximum allowable flow length:

ac = 1/π(KIC/σY


ac = Maximum Allowable Flow Length
KIC = Fracture Toughness
σ = Stress
Y = Applied Load Constant

Let’s solve an example;
Find the maximum allowable flow length when the fracture toughness is 10, the stress is 2 and the applied load constant is 5.

This implies that;

KIC = Fracture Toughness = 10
σ = Stress = 2
Y = Applied Load Constant = 5

ac = 1/π(KIC/σY
ac = 1/π(10/(5)(2)
ac = 1/π(10/(10)
ac = 1/π(1)²
ac = 1/π(1)
ac = (0.318)(1)
ac = 0.318

Therefore, the maximum allowable flow length is 0.318 m.

Nickzom Calculator – The Calculator Encyclopedia is capable of calculating the maximum allowable flow length.

To get the answer and workings of the maximum allowable flow length 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 –

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

Android (Paid) –
Android (Free) –

Apple (Paid) –
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 Maximum Allowable Flow Length under Fracture

The screenshot below displays the page or activity to enter your values, to get the answer for the maximum allowable flow length according to the respective parameter which is the Fracture Toughness (KIC), Applied Load Constant (Y) and Stress (σ).

Now, enter the values appropriately and accordingly for the parameters as required by the Fracture Toughness (KIC) is 10, Applied Load Constant (Y) is 5 and Stress (σ) is 2.

Finally, Click on Calculate

As you can see from the screenshot above, Nickzom Calculator– The Calculator Encyclopedia solves for the maximum allowable flow length and presents the formula, workings and steps too.

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