Direct Compressive Stress In Central Plane Of Crank Web Of Centre Crankshaft At TDC Position Calculator

Formula Used:

\[ \sigma_c = \frac{R_{v1}}{w \times t} \]

Compressive Stress in Crank Web Central Plane (σ_c):

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1. What is Direct Compressive Stress in Crank Web?

Direct compressive stress in crank web central plane is the magnitude of force applied onto the crank web, divided by cross-sectional area of crank web in a direction perpendicular to the applied force. It's a critical parameter in crankshaft design and analysis.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ \sigma_c = \frac{R_{v1}}{w \times t} \]

Where:

\( \sigma_c \) — Compressive stress in crank web central plane (Pa)
\( R_{v1} \) — Vertical reaction at bearing 1 due to crankpin force (N)
\( w \) — Width of crank web (m)
\( t \) — Thickness of crank web (m)

Explanation: The formula calculates the compressive stress by dividing the vertical reaction force by the cross-sectional area of the crank web.

3. Importance of Compressive Stress Calculation

Details: Accurate compressive stress calculation is crucial for ensuring crankshaft structural integrity, preventing failure under load, and optimizing design for weight and performance.

4. Using the Calculator

Tips: Enter vertical reaction force in Newtons, width and thickness in meters. All values must be positive and non-zero for accurate calculation.

5. Frequently Asked Questions (FAQ)

Q1: What is the significance of TDC position in this calculation?
A: At Top Dead Center position, the crankshaft experiences maximum compressive forces, making this the critical position for stress analysis.

Q2: What are typical values for crank web dimensions?
A: Crank web dimensions vary significantly based on engine size and application, but typical values range from 20-100mm for width and 10-50mm for thickness.

Q3: How does this stress affect crankshaft design?
A: Compressive stress values help determine if the crank web dimensions are adequate or need reinforcement to prevent failure under operating conditions.

Q4: What safety factors are typically used?
A: Safety factors of 2-4 are commonly used in crankshaft design, depending on the application and material properties.

Q5: Can this calculator be used for other crankshaft positions?
A: While specifically designed for TDC position, the same formula applies to other positions, though the vertical reaction force values will differ.