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Primary Shear Load on Bolt is defined as the force acting in a direction parallel to a surface or to a planar cross-section of the bolt. It represents the direct shear force that each bolt must resist in a jointed assembly.
The calculator uses the formula:
Where:
Explanation: The formula calculates the shear force distributed equally among all bolts in the joint, assuming uniform load distribution.
Details: Accurate calculation of primary shear load is crucial for proper bolt selection, ensuring structural integrity, and preventing joint failure in mechanical assemblies.
Tips: Enter the total external force acting on the joint and the number of bolts sharing the load. Both values must be positive numbers (external force > 0, number of bolts ≥ 1).
Q1: What is the difference between primary and secondary shear loads?
A: Primary shear load is the direct shear force distributed among bolts, while secondary shear load results from moment or eccentric loading in the joint.
Q2: Does this formula assume equal load distribution?
A: Yes, this formula assumes that the external force is equally distributed among all bolts in the joint.
Q3: When is this formula not applicable?
A: This formula may not be accurate for joints with eccentric loading, uneven bolt spacing, or when bolts have different stiffness properties.
Q4: How does bolt preload affect shear load calculation?
A: While this formula calculates the theoretical shear load, actual bolt performance also depends on preload, which creates friction that resists shear forces.
Q5: What safety factors should be considered?
A: Appropriate safety factors should be applied based on the application, loading conditions, and material properties to ensure reliable joint performance.