Define Dynamic Force Transfer Test of Shock Transmission Unit?
This test mainly prove the lock up capability of the device. The STU shall be loaded in tension from zero to the full design load in less than 0.50 seconds and the force sustained for 5 seconds. Then the load shall be reversed to the full design load in less than 0.50 seconds and held again for 5 seconds. The acceptance criteria for the above test shall be that the deflection during the loading of the positive force and the negative force shall be no greater than 6 mm and the deflection during sustained load portion shall not exceed 3 mm.