Published on November 24, 2008
Design and development of test rig of axle and suspension for fatigue test.
Product definition : Test rig to test fatigue strength of front axle and suspension system. This test gives effect of given types of fatigue stresses : Completely reversed stresses. Alternating stresses Fluctuating reversed stresses Repeated reversed stresses.
Test rig to test fatigue strength of front axle and suspension system. This test gives effect of given types of fatigue stresses :
Completely reversed stresses.
Fluctuating reversed stresses
Repeated reversed stresses.
Clarification and elaboration : Test rig: Test rig assembly consist of mechanical type fatigue test fixture having bell crank mechanism which is attached to flywheel driven by an electric motor through a suitable that provides the desired oscillating or cycle speed.
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)
List of components: Mechanical test rig fixture. Electric motor Flywheel Strain gages Amplifier Gear reduction drive
Mechanical test rig fixture.
Gear reduction drive
Schedule: Jan Feb March April Phase 0 Phase 1and 2 Phase 3
PHASE 0: (1) Overall function of project (2)Clarification and elaboration. (3)Product research. (4)Presentation . phase0 Overall function Clarification and elaboration Product research requirements schedule
(1) Overall function of project
(2)Clarification and elaboration.
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
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:
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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