Diameter Of Side-Crankshaft Under Flywheel At Max Torque Calculator

Formula Used:

\[ Ds = \left( \frac{16}{\pi \cdot \tau} \cdot \sqrt{Mbh^2 + Mbv^2 + Mt^2} \right)^{1/3} \]

Shear Stress in Crankshaft Under Flywheel (τ):

Horizontal Bending Moment in Shaft Under Flywheel (Mbh):

N·m

Vertical Bending Moment in Shaft Under Flywheel (Mbv):

N·m

Torsional Moment at Crankshaft Under Flywheel (Mt):

N·m

Diameter of Shaft Under Flywheel (Ds):

Unit Converter ▲

Unit Converter ▼

From:	To:

1. What is the Diameter of Side-Crankshaft Under Flywheel Calculation?

The diameter calculation determines the appropriate shaft size below the flywheel that can withstand combined bending and torsional moments while maintaining acceptable shear stress levels. This ensures structural integrity and proper functioning of the crankshaft assembly.

2. How Does the Calculator Work?

The calculator uses the mechanical engineering formula:

\[ Ds = \left( \frac{16}{\pi \cdot \tau} \cdot \sqrt{Mbh^2 + Mbv^2 + Mt^2} \right)^{1/3} \]

Where:

\( Ds \) — Diameter of shaft under flywheel (m)
\( \tau \) — Shear stress in crankshaft under flywheel (Pa)
\( Mbh \) — Horizontal bending moment in shaft under flywheel (N·m)
\( Mbv \) — Vertical bending moment in shaft under flywheel (N·m)
\( Mt \) — Torsional moment at crankshaft under flywheel (N·m)
\( \pi \) — Mathematical constant pi (approximately 3.1416)

Explanation: The formula combines the effects of horizontal and vertical bending moments with torsional moment to determine the minimum shaft diameter that can safely handle the combined loading.

3. Importance of Shaft Diameter Calculation

Details: Accurate shaft diameter calculation is crucial for preventing mechanical failure, ensuring proper power transmission, maintaining structural stability, and optimizing material usage in crankshaft design.

4. Using the Calculator

Tips: Enter all values in appropriate units (Pa for shear stress, N·m for moments). Ensure all values are positive and within reasonable engineering limits for accurate results.

5. Frequently Asked Questions (FAQ)

Q1: Why is shear stress important in shaft design?
A: Shear stress determines the shaft's ability to resist twisting and bending forces without permanent deformation or failure.

Q2: What are typical shear stress values for crankshaft materials?
A: Typical values range from 40-150 MPa for steel crankshafts, depending on the material grade and heat treatment.

Q3: How do bending moments affect shaft diameter?
A: Higher bending moments require larger shaft diameters to maintain structural integrity and prevent excessive deflection.

Q4: What safety factors should be considered?
A: Engineering practice typically applies safety factors of 1.5-3.0 depending on application criticality and loading conditions.

Q5: Can this calculator be used for other shaft types?
A: While specifically designed for crankshafts under flywheels, the principle can be applied to other shaft designs with combined loading.