Compressive Stress In Key Equation:
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Compressive Stress in Key is the force per unit area of a key cross-section that is responsible for the deformation of the material such that the volume of the material reduces. It is a critical parameter in mechanical design to ensure proper transmission of torque between shafts and connected components.
The calculator uses the Compressive Stress in Key equation:
Where:
Explanation: The equation calculates the compressive stress experienced by a key when transmitting torque from a shaft to a connected component, considering the geometric parameters of the key and shaft.
Details: Accurate calculation of compressive stress in keys is crucial for ensuring the structural integrity of mechanical connections, preventing key failure, and maintaining efficient power transmission in machinery.
Tips: Enter transmitted torque in N·m, diameter of shaft in meters, length of key in meters, and height of key in meters. All values must be positive and non-zero.
Q1: What is the typical range for compressive stress in keys?
A: The acceptable compressive stress varies by material, but typically ranges from 50-200 MPa for steel keys, depending on the application and safety factors.
Q2: How does key material affect compressive stress?
A: Different materials have different yield strengths. The key material must be selected to withstand the calculated compressive stress without permanent deformation.
Q3: What happens if compressive stress exceeds material limits?
A: Excessive compressive stress can cause key deformation, crushing, or failure, leading to loss of torque transmission and potential equipment damage.
Q4: Are there standard key sizes for different shaft diameters?
A: Yes, mechanical standards (such as ANSI, ISO) provide recommended key dimensions for various shaft diameters to ensure proper fit and stress distribution.
Q5: Can this formula be used for woodruff keys?
A: This specific formula is designed for rectangular/square keys. Woodruff keys have different geometry and require modified stress calculations.