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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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Presentation Transcript
Fatigue testing machine

Fatigue testing machine

Fatigue Group :-

Abed Al Salam Hammouz

Ahmad Abaza

Ala’ Mustafa

Mohammad Bahish

Supervised by :-

Dr. Ahmad Al Ramahi


Outline
Outline

  • 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

F/2

F/2

Forcing method using dead weights.






Manufacturing and assembly
Manufacturing and Assembly

Used Manufacturing processes

Turning

Welding

Milling




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




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