1. What is Torsional Moment in Crankweb?

Torsional Moment in Crankweb is the torsional reaction induced in the crankweb when an external twisting force is applied to the crankweb causing it to twist. It's a critical parameter in crankshaft design and analysis.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( Mt \) — Torsional Moment in Crankweb (Newton Meter)
• \( T \) — Shear Stress in Crankweb (Pascal)
• \( Zp \) — Polar Section Modulus of Crankweb (Cubic Meter)

Explanation: The torsional moment is calculated by multiplying the shear stress in the crankweb by the polar section modulus of the crankweb.

3. Importance of Torsional Moment Calculation

Details: Accurate calculation of torsional moment is crucial for crankshaft design, ensuring structural integrity, preventing failure under torque loads, and optimizing performance in internal combustion engines.

4. Using the Calculator

Tips: Enter shear stress in Pascal and polar section modulus in Cubic Meter. Both values must be positive numbers for valid calculation.

5. Frequently Asked Questions (FAQ)

Q1: What is polar section modulus?
A: Polar Section Modulus is the ratio of polar moment of inertia about the neutral axis to the distance of extreme fiber from the neutral axis.

Q2: Why is torsional moment important in crankshaft design?
A: Torsional moment helps determine the stress distribution and ensures the crankshaft can withstand the twisting forces encountered during operation.

Q3: What units should be used for input values?
A: Shear stress should be in Pascal (Pa) and polar section modulus should be in Cubic Meter (m³).

Q4: Can this calculator be used for other shaft components?
A: While the formula is general, this calculator is specifically designed for crankweb calculations in centre crankshafts.

Q5: What are typical values for these parameters?
A: Values vary significantly based on engine size and design. Consult engineering specifications for your particular application.