Bending Stress In Crankweb Of Side Crankshaft Due To Radial Thrust For Max Torque Calculator

Formula Used:

\[ \sigma_{br} = \frac{6 \times P_r \times ((L_c \times 0.75) + (t \times 0.5))}{t^2 \times w} \]

Radial Force at Crank Pin (Pr):

Length of Crank Pin (Lc):

Thickness of Crank Web (t):

Width of Crank Web (w):

Bending Stress in Crankweb Due to Radial Force (σbr):

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1. What is Bending Stress in Crankweb Due to Radial Force?

Bending Stress in Crankweb Due to Radial Force is the bending stress in the crankweb caused by the radial component of force on the connecting rod at the crank pin. This stress is critical in determining the structural integrity of the crankshaft under maximum torque conditions.

2. How Does the Calculator Work?

The calculator uses the following formula:

\[ \sigma_{br} = \frac{6 \times P_r \times ((L_c \times 0.75) + (t \times 0.5))}{t^2 \times w} \]

Where:

\( \sigma_{br} \) — Bending Stress in Crankweb Due to Radial Force (Pa)
\( P_r \) — Radial Force at Crank Pin (N)
\( L_c \) — Length of Crank Pin (m)
\( t \) — Thickness of Crank Web (m)
\( w \) — Width of Crank Web (m)

Explanation: This formula calculates the bending stress in the crankweb by considering the radial force applied at the crank pin and the geometric dimensions of the crankweb.

3. Importance of Bending Stress Calculation

Details: Accurate calculation of bending stress is crucial for designing crankshafts that can withstand the maximum torque conditions without failure. It helps in determining the appropriate dimensions and material selection for the crankshaft.

4. Using the Calculator

Tips: Enter the radial force at the crank pin in Newtons (N), length of crank pin in meters (m), thickness of crank web in meters (m), and width of crank web in meters (m). All values must be positive and non-zero.

5. Frequently Asked Questions (FAQ)

Q1: What is the significance of the constants 0.75 and 0.5 in the formula?
A: These constants represent the effective lever arms for the radial force application points on the crankweb, derived from empirical studies and mechanical principles.

Q2: How does radial force affect the crankshaft?
A: Radial force creates bending moments in the crankweb, which can lead to fatigue failure if not properly accounted for in design.

Q3: What are typical values for crankweb dimensions?
A: Dimensions vary based on engine size and application, but typical thickness ranges from 0.02-0.1m and width from 0.03-0.15m for automotive applications.

Q4: How does this stress relate to overall crankshaft design?
A: This bending stress is one of several critical stresses that must be considered along with torsional stress, shear stress, and fatigue considerations.

Q5: 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.