STR10 Fatigue Testing Machine
Environmental Science Business Unit (ENV)
Pressure Calibration Lab Business Unit (PRS)
Educational Engineering Business Unit (ENG)
Materials Science Business Unit (MAT)
Educational Engineering Business Unit (ENG)
 

STR10 Fatigue Testing Machine

Using this unit, the basic principles of fatigue testing can be studied. A rotating metal test bar,clamped at one end, is loaded using a spring balance with a point force. This results in a cyclic bending load on the cylindrical specimen. The amplitude of the cyclic loading can be continuously adjusted using a screw with hand wheel. After a certain number of load cycles, the specimen breaks as a result of material fatigue. In this case the machine is shut down automatically by the stop switch. The number of load cycles is counted by an electrical counter and displayed digitally. This can also be used for measuring the speed. Differentshape specimens enable the influence of notching and surface finish on fatigue strength to be studied.

Specifications

1. Desk top unit for fatigue strength testing

       a. The machine can test fatigue strength of material.

       b. The Wohler Diagram can be drawn from test results.

2. Specimens: 3 different materials (steel, aluminium, brass) of 10 pcs each, all diameter 8 mm.

3. Special shape specimens for demonstrating the influence of notching and surface finish

4. Recording of a stress-number (S-N) diagram

5. Motor speed 2800rpm, power output 0.37kW (1/2hp)

6. Single phase electric motor, 240V , 50Hz

7. Loading with spring balance 0...300N

8. Adjustment of loading amplitude using a screw with hand wheel

9. Automatic shut down on specimen fracture by stop switch

10. Load cycle counter with 8-digit display