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Fatigue testing machine. Fatigue Group :- Abed Al Sala m Hammouz Ahmad Abaza Ala ’ Mustafa Mohammad Bahish. Supervised by :- Dr. Ahmad Al Ramahi. Outline . Part one Review. Design stage. Manufacturing and Assembly Testing and documentation Cost analysis and further work.

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Fatigue testing machine

Fatigue testing machine

Fatigue Group :-

Abed Al Salam Hammouz

Ahmad Abaza

Ala’ Mustafa

Mohammad Bahish

Supervised by :-

Dr. Ahmad Al Ramahi


  • Part one Review.

  • Design stage.

  • Manufacturing and Assembly

  • Testing and documentation

  • Cost analysis and further work

Part one review
Part One Review

  • Literature review about fatigue

  • Preliminary design

Preliminary design specimens
Preliminary Design - Specimens

  • Four point clamping test specimen .

  • Three point clamping test specimen .

Preliminary design life estimation
Preliminary Design – Life Estimation

Stress based approach :

Design stage
Design stage

  • Machine Functions and Layout.

  • Design Calculation.

Machine functions and layout
Machine Functions and Layout

Rotating bending test
Rotating bending test

  • Put the specimen under pure bending moment

Rotating bending test1
Rotating bending test



Forcing method using dead weights.

Manufacturing and assembly
Manufacturing and Assembly

Used Manufacturing processes




Machine features
Machine Features

  • Ease of use.

Machine features1
Machine Features

  • It has a good flexibility.

Electrical circuit
Electrical Circuit

  • Ease of operate machine.

  • Control the time of experiment .

  • Give accurate results for number of cycles to failure .

  • Support safety for both user and machine .

Electrical circuit2
Electrical Circuit

Safety mode

  • The motor does not work until:

  • The main switch is ON.

  • Emergency switch and (ON/OFF switch) are ON.

  • Cover of the motor is completely closed.

Electrical circuit3
Electrical Circuit

Accuracy in reading results

  • To get the accuracy in results.

  • The normally open limit switches are ON.

  • The normally closed limit switches are ON.

  • Then sensor feeds signals.

Electrical circuit4
Electrical Circuit

  • Open limit switches are ON means the cover of the motor is closed, the house is not aligned, does not happen any failure in the specimen.

  • Closed limit switches are ON means, the contactor start connecting, and there is a load affecting on the specimen.

Electrical circuit5
Electrical Circuit

  • When start getting signals from the sensor,

  • counter counting until the specimen fails,then:-

  • The motor stop rotating,

  • Sensor stop feeding with signals,

  • And the counter holds the values on.

Testing and documentation
Testing and Documentation

  • Testing operation