Code: MOT-MCL-0016
Rotating Fatigue Machine.
Demonstrates the failure of materials when subjected to a cyclic stress
Experiments
Low and high cycle fatigue
How to create and use Wohler (Sâ€N) curves for various materials
Comparison of fatigue properties of various materials
Specifications
Works with a Versatile Data Acquisition System to allow monitoring of the experiment while
unattended
A precision engineered base supports a motor that rotates a drive shaft and collet type
chuck for gripping the specimen with uniform pressure around it’s circumference
An adjustable deadâ€weight loading device fitted into a loading arm mechanism applies a vertical load on the specimen using a selfâ€aligning bearing inside a gimbal
A sensor counts the number of rotations of the specimen, maximum cycle count 9.99 x 108,
with a resolution of one cycle
Standard cycle rate is 60 Hz
Variable speed drive 0â€3600 rpm
Recommended typical test times from 17 seconds to 46 hours 18 minutes
A load cell measures the force applied to the specimen.
Maximum stress: 350 MPa
Motor to automatically shut down after specimen breaks
To include a separate control box containing a motor drive and digital display showing load,
cycle rate and the number of rotations
To be supplied with 10x Steel and 10x Aluminium specimens; each specimen to be
nominally 64 mm long, between 8.96 and 8.99 mm diameter, with a neck diameter between
3.95 mm and x 4.05 mm