The image above represents the linear roughness parameter. To calculate the linear roughness parameter, two essential parameters are needed and these parameters are True Crack Length (Lt) and Projected Crack Length (Lp).
The formula for calculating the linear roughness parameter:
RL = Lt / Lp
Where:
RL = Linear Roughness Parameter
Lt = True Crack Length
Lp = Projected Crack Length
Let’s solve an example;
Find the linear roughness parameter when the true crack length is 5 and the projected crack length is 8.
This implies that;
Lt = True Crack Length = 5
Lp = Projected Crack Length = 8
RL = Lt / Lp
So, RL = 5 / 8
RL = 0.625
Therefore, the linear roughness parameter is 0.625.
Calculating the True Crack Length when the Linear Roughness Parameter and the Projected Crack Length are Given
Lt = RL x Lp
Where:
Lt = True Crack Length
RL = Linear Roughness Parameter
Lp = Projected Crack Length
Let’s solve an example;
Find the true crack length when the linear roughness parameter is 8 and the projected crack length is 2.
This implies that;
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RL = Linear Roughness Parameter = 8
Lp = Projected Crack Length = 2
Lt = RL x Lp
Then, Lt = 8 x 2
Lt = 16
Therefore, the true crack length is 16.
Read more:Â How to Calculate and Solve for Surface Roughness Parameter I Polymer Deformation
Calculating the Projected Crack Length when the Linear Roughness Parameter and the True Crack Length are Given
Lp = Lt / RL
Where:
Lp = Projected Crack Length
RL = Linear Roughness Parameter
Lt = True Crack Length
Let’s solve an example;
Find the projected crack length when the linear roughness parameter is 12 and the true crack length is 36.
This implies that;
RL = Linear Roughness Parameter = 12
Lt = True Crack Length = 36
That is, Lp = Lt / RL
Lp = 36 / 12
Lp = 3
Therefore, the projected crack length is 3.
Read more:Â How to Calculate and Solve for Risk of Rupture | Polymer Deformation
How to Calculate the Linear Roughness Parameter Using Nickzom Calculator
Nickzom Calculator – The Calculator Encyclopedia is capable of calculating the linear roughness parameter.
To get the answer and workings of the linear roughness parameter 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 Polymer Deformation under Materials and Metallurgical
Now, Click on Linear Roughness Parameter under Polymer Deformation
The screenshot below displays the page or activity to enter your values, to get the answer for the linear roughness parameter according to the respective parameter which is the True Crack Length (Lt) and Projected Crack Length (Lp).
Now, enter the values appropriately and accordingly for the parameters as required by the True Crack Length (Lt) and Projected Crack Length (Lp).
Finally, Click on Calculate
As you can see from the screenshot above, Nickzom Calculator– The Calculator Encyclopedia solves for the linear roughness parameter and presents the formula, workings and steps too.
