The image above represents linear shrinkage. To calculate the linear shrinkage, two essential parameters are needed and these parameters are Linear Dimension of the Mould (lm) and Size of the Casting at 20°C (lo).
The formula for calculating linear shrinkage:
εL = lm – lo / lo x 100%
Where:
εL = Linear Shrinkage
lm = Linear Dimension of the Mould
lo = Size of Casting at 20°C
Let’s solve an example;
Find the Linear shrinkage where the linear dimension of the mould is 20 and the size of casting is 10.
This implies that;
lm = Linear Dimension of the Mould = 20
lo = Size of Casting at 20°C = 10
εL = lm – lo / lo x 100%
εL = 20 – 10 / 10 x 100%
Then, εL = 10 / 10 x 100%
εL = 1 x 100%
εL = 100%
Therefore, the linear shrinkage is 100%.
Read more: How to Calculate and Solve for Fired Linear Shrinkage | Refractories
How to Calculate Linear Shrinkage Using Nickzom Calculator
Nickzom Calculator – The Calculator Encyclopedia is capable of calculating the linear shrinkage.
To get the answer and workings of the linear shrinkage 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
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To get access to the professional version via web, you need to register and subscribe for NGN 2,000 per annum 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 Solidification of Metal under Materials and Metallurgical
Now, Click on Linear Shrinkage under Solidification of Metal
The screenshot below displays the page or activity to enter your values, to get the answer for the linear shrinkage according to the respective parameter which is the Linear Dimension of the Mould (lm) and Size of the Casting at 20°C (lo).
Now, enter the values appropriately and accordingly for the parameters as required by the Linear Dimension of the Mould (lm) is 20 and Size of the Casting at 20°C (lo) is 10.
Finally, Click on Calculate
As you can see from the screenshot above, Nickzom Calculator– The Calculator Encyclopedia solves for the linear shrinkage and presents the formula, workings and steps too.
