How to Calculate and Solve for Risk of Rupture | Polymer Deformation
Last Updated on December 11, 2021
The image above represents risk of rupture.
To compute for risk of rupture, four essential parameters are needed and these parameters are Applied Stress (σ), Stress below Zero Probability of Failure (σu), Characteristic Strength (σo) and Weibull Modulus (m).
The formula for calculating risk of rupture:
R = (σ – σu / σo)m
Where:
R = Risk of Rupture
σ = Applied Stress
σu = Stress below Zero Probability of Failure
σo = Characteristic Strength
m = Weibull Modulus
Let’s solve an example;
Find the risk of rupture when the applied stress is 14, the stress below zero proability of failure is 7, the characteristic strength is 18 and the weibull modulus is 2.
This implies that;
σ = Applied Stress = 14
σu = Stress below Zero Probability of Failure = 7
σo = Characteristic Strength = 18
m = Weibull Modulus = 2
R = (σ – σu / σo)m
R = (14 – 7 / 18)2
R = (7 / 18)2
R = (0.388)2
R = 0.151
Therefore, the risk of rupture is 0.151.
Nickzom Calculator – The Calculator Encyclopedia is capable of calculating the risk of rupture.
To get the answer and workings of the risk of rupture 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 Risk of Rupture under Polymer Deformation
The screenshot below displays the page or activity to enter your values, to get the answer for the risk of rupture according to the respective parameter which is the Applied Stress (σ), Stress below Zero Probability of Failure (σu), Characteristic Strength (σo) and Weibull Modulus (m).
Now, enter the values appropriately and accordingly for the parameters as required by the Applied Stress (σ) is 14, Stress below Zero Probability of Failure (σu) is 7, Characteristic Strength (σo) is 18 and Weibull Modulus (m) is 2.
Finally, Click on Calculate
As you can see from the screenshot above, Nickzom Calculator– The Calculator Encyclopedia solves for the risk of rupture and presents the formula, workings and steps too.
