4. Clarification and elaboration : (approximate estimates) Max length 1500. Max Diameter 250. Dimension of axle: (mm) 3 to 5. Test rig weight : (metric tones) 3000Wx2000Dx1000H Space availability: (mm)
8. Bell cranck mechanism attached to a flywheel driven by an electric motor . Energy requirement: Mechanical energy and electrical energy. Test rig should apply loads by combination of two or three basic means of energy available, (flexibility of energy resource). Wish: Loading frequency depends on type of fatigue load on axle to be applied during test. It also depends on design characteristics of axle. Technical requirement: fatigue test should be conducted in a reasonable loading frequency. Test rig should Produce Meaningful and reliable acclerated test results in a reasonable period of time. Demand: Details Requirements or means to satisfy demand/wish. Demand /wish
9. Strain gages : Load cells Torque cells Amplifier Oscilloscope. Equipment requirement: All measuring gages should be permanently attached to the test rig. Accurate measurement and calibration of load and uniform test results can be produced. Demand : Elctrohydraulic test systems. Equipment requirement: Specimens can be fatigue tested by such equipment which can be programmed or tape controlled. Actual service condition can be duplicated in the laboratory. Wish:
10. monitoring records. Recording device: Keep record of tests and prevent loss of test evidence in case of test failure. It should maintain history of previous test. Wish: Mechanically or by means of strain gages. Test must be terminated at required point of time. Test rig should be safe . Demand:
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