PHYIC CALCULATOR
Fatigue Strength Calculator
A precise tool.
What is the Fatigue Strength Calculator & How does it work?
Fatigue strength is the ability of a material to withstand repeated cycles of stress without failing. The S-N relation, also known as the WΓΆhler curve, describes the relationship between the cyclic stress amplitude and the number of cycles to failure.
sigma_a = left(frac{S_{ut}}{N_f}right)^{1/n}
sigma_a = stress amplitude, S_{ut} = ultimate tensile strength, N_f = number of cycles to failure, n = fatigue exponent
This calculator estimates the fatigue strength or the number of cycles to failure based on the given stress amplitude and material fatigue constants.
Parameters
Result
β
Frequently Asked Questions
What is fatigue strength?
Fatigue strength is a material’s ability to withstand repeated stress cycles without failing.
How does the S-N curve relate to fatigue strength?
The S-N curve, or WΓΆhler curve, shows how cyclic stress amplitude affects the number of cycles to failure for a material.
What do I need to input into this calculator?
You need to enter the ultimate tensile strength (Sut), number of cycles to failure (Nf), and fatigue exponent (n) to calculate stress amplitude (Οa).
Can this calculator predict material failure under cyclic loading?
Yes, by estimating the number of cycles to failure or the fatigue strength, it helps predict when a material might fail under repeated stress.
What is the significance of the fatigue exponent (n) in the S-N relation?
The fatigue exponent (n) indicates the rate at which the number of cycles to failure decreases as the cyclic stress amplitude increases.
How accurate is this calculator for real-world applications?
Accuracy depends on the material properties and assumptions used; it provides a good estimate but may need adjustments for specific conditions.
Can I use this calculator for different materials?
Yes, as long as you have the relevant material properties like ultimate tensile strength and fatigue exponent.
Results are for informational purposes only and do not constitute professional advice.