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Contact Stresses (Contact Stresses (Contact Stresses are associated with:,…
Contact Stresses
Contact Stresses
Contact Stresses are associated with:
Rolling Elements like:
Wheels on Rails
Rolling Bearings
Sliding Elements like:
Cams
Gears
Cause Hertzian Stresses
Failure Modes include:
Pits
Pits
Cracks
Consider two special Cases of Hertzian Stresses
Spherical Contact
Cylindrical Contact
Loading normally Cyclic: Fatigue
Cylindrical Contact
Formula
Shear Stress needs to be considered when present
Image
Surface Hardening Heat Treatment
Nitriding
Flame and Induction Hardening
Carburization
Why are Contact Stresses important in
Machine Design?
Machine
Structure
Load Path Efficiency
Energy System
Energy Efficiency
Design Objective:
Safety (& Health)
Efficiency
Achieve the Function
Spherical Contact
Images
Formula
General Case