Resultant Bending Moment In Centre Crankshaft At TDC Position Below Flywheel Calculator

Formula Used:

\[ M_{br} = \sqrt{(R_{v3} \times c_2)^2 + (R_{h3} \times c_2)^2} \]

Vertical Reaction at Bearing 3 due to Flywheel (R_v3):

Centre Crankshaft Bearing3 Gap from Flywheel (c₂):

Horizontal Reaction at Bearing 3 due to Belt (R_h3):

Total Bending Moment in Crankshaft under Flywheel (M_br):

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1. What is the Resultant Bending Moment in Centre Crankshaft?

The resultant bending moment in the centre crankshaft at TDC position below flywheel represents the combined effect of vertical and horizontal bending moments acting on the crankshaft due to flywheel weight and belt tensions.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ M_{br} = \sqrt{(R_{v3} \times c_2)^2 + (R_{h3} \times c_2)^2} \]

Where:

\( M_{br} \) — Total bending moment in crankshaft under flywheel (N·m)
\( R_{v3} \) — Vertical reaction at bearing 3 due to flywheel (N)
\( c_2 \) — Centre crankshaft bearing 3 gap from flywheel (m)
\( R_{h3} \) — Horizontal reaction at bearing 3 due to belt (N)

Explanation: The formula calculates the resultant bending moment by combining the effects of both vertical and horizontal forces acting on the crankshaft.

3. Importance of Bending Moment Calculation

Details: Accurate bending moment calculation is crucial for crankshaft design, ensuring structural integrity, preventing fatigue failure, and optimizing material selection for engine components.

4. Using the Calculator

Tips: Enter all values in appropriate units (N for forces, m for distance). Ensure all inputs are non-negative values for valid calculations.

5. Frequently Asked Questions (FAQ)

Q1: Why is the bending moment calculation important in crankshaft design?
A: It helps determine the stress distribution and ensures the crankshaft can withstand operational loads without failure.

Q2: What factors influence the bending moment in a crankshaft?
A: Flywheel weight, belt tensions, bearing positions, and engine operational conditions all contribute to the bending moment.

Q3: How does the TDC position affect the bending moment?
A: At TDC position, certain forces are maximized, making this a critical position for stress analysis in crankshaft design.

Q4: Are there limitations to this calculation method?
A: This calculation provides a simplified approach; actual conditions may require more complex finite element analysis for precise results.

Q5: What safety factors should be considered?
A: Typical safety factors range from 2-4 depending on application, material properties, and operating conditions.