Estimate elastic deflection of a round beam under the support and loading assumptions used by the page.
Round tube beam deflection Calculator
Form
Results
Deflection (Inches)
0
Bending Stress (PSI)
0
Table of Contents
1
What is Round tube beam deflection?
2
How to Use This Calculator
- Enter or select Length (Inches), Diameter (Inches), Wall Thickness (Inches), Force (Pounds), Material.
- Check the unit beside each measurement. For a percentage or rate, use the scale and time period stated in the form.
- Choose Calculate, then compare the output with the formula and example below. If you change a value or option, calculate again to update the result.
3
Formula Used
End-loaded cantilever: Di=Do−2t; I=π(Do⁴−Di⁴)/64; physical tip deflection=PL³/(3EI).
4
Variables Explained
| Input | What it means |
|---|---|
| Length (Inches) | The measured end-to-end distance of the section being calculated. |
| Diameter (Inches) | Distance across a circle through its center; twice the radius. |
| Wall Thickness (Inches) | Distance through the layer or material, rather than its face width. |
| Force (Pounds) | Use the measured or stated value for this item, with the unit or category shown beside the field. |
| Material | Choose the applicable option; it determines which relationship or conversion the page applies. |
5
Worked Example
Holding everything else fixed, doubling the beam length multiplies an elastic bending deflection by eight.
6
Why Use This Calculator?
The result estimates deflection under a particular elastic model. It does not establish strength, stability or a safe structural design.
7
Common Mistakes
- The current page multiplies its calculated deflection by 100,000,000 before display. That displayed value is not the unscaled physical deflection; verify the calculation independently before using it.
8
Frequently Asked Questions
Why does diameter have such a strong effect?
The second moment of area depends on diameter to the fourth power. A small change in section size can therefore change elastic bending stiffness substantially.
When should I round a measurement?
Carry the measured values and conversion factors through the calculation first. Round the final result to a precision justified by the original measurements.
9
Sources & References
Mini Calculator provides online calculators for multiple niches including mathematical, financial, Health, informative, Chemistry, physics, statistics, and conversions. You can use any calculator for free without any limits.