Calculate din 743 esaslı shaft birleşik stress and yorulma Ön tasarımı using engineering units and the defined formula.
DIN 743 Shaft Combined Stress and Fatigue Preliminary Design
Calculate din 743 shaft combined stress and fatigue preliminary design using engineering units and the defined formula.
Result chart
Formula and calculation steps
Note: Results are for preliminary engineering evaluation. Verify assumptions, material data, safety factors, applicable standards, and manufacturer limits before final design. Tool version 2.7.1
How to use this calculator
- Enter the measurements and operating values.
- Select the correct engineering unit for each value.
- Press Calculate to view the result and intermediate values.
- Review the equation steps and download a PDF report if needed.
Equation used
σb=32M/(πd³); τt=16T/(πd³); σv=√(σ²+3τ²); U=σa,v/σD+σm,v/Rm
How to evaluate the result
Results are for preliminary engineering evaluation. Verify assumptions, material data, safety factors, applicable standards, and manufacturer limits before final design.
Technical references
Input guide for DIN 743 Shaft Combined Stress and Fatigue Preliminary Design
Calculate din 743 shaft combined stress and fatigue preliminary design using engineering units and the defined formula. The table below summarises the inputs and example starting values.
| Parameter | Example value | Units and description |
|---|---|---|
| Critical mil çapı | 45 | mm |
| Mean eğilme momenti | 0 | N·m |
| Bending momenti genliği | 1200 | N·m |
| Mean tork | 900 | N·m |
| Torque genliği | 300 | N·m |
| Mean eksenel kuvandt | 10 | kN |
| Eksenel kuvandt genliği | 5 | kN |
| Bending çentik katsayısı Kf | 1.8 | Dimensionless or selection value |
| Torsion çentik katsayısı Kfs | 1.5 | Dimensionless or selection value |
| Surface faktörü | 0.85 | Dimensionless or selection value |
| Boyut faktörü | 0.90 | Dimensionless or selection value |
| Çekme dayanımı Rm | 800 | MPa |
| Akma dayanımı Re | 600 | MPa |
| Numune eğilme yorulma sınırı | 360 | MPa |
| Numune burulma yorulma sınırı | 210 | MPa |
Example calculation scenario
For an initial check, enter the example values from the table, select the required units, and choose Calculate. Review the main result and equation, then replace the examples with measured or design data from your system.
Common mistakes when using DIN 743 Shaft Combined Stress and Fatigue Preliminary Design
- Ignoring transmission efficiency, service factor, or transient operating conditions.
- Mixing unit systems without checking the selected units.
- Using example values instead of measured or design data from the actual system.
- Accepting the result without checking safety factors, duty cycle, and manufacturer limits.
Fundamental equation: σb=32M/(πd³); τt=16T/(πd³); σv=√(σ²+3τ²); U=σa,v/σD+σm,v/Rm
Frequently asked questions
What is DIN 743 Shaft Combined Stress and Fatigue Preliminary Design used for?
Calculate din 743 shaft combined stress and fatigue preliminary design using engineering units and the defined formula. Use it for preliminary engineering sizing and independent result checks.
Which equation does this calculator use?
The calculation is based on σb=32M/(πd³); τt=16T/(πd³); σv=√(σ²+3τ²); U=σa,v/σD+σm,v/Rm. Inputs are converted according to the selected units.
Can the result be used as a final design value?
Results are for preliminary engineering evaluation. Verify assumptions, material data, safety factors, applicable standards, and manufacturer limits before final design. Confirm the result against the current standard, project specification, and manufacturer data.
