Abstract
In this work, a barrier type vehicle-collision test rig that incorporates in its structure a colloidal damper was designed and manufactured. Instead of a real vehicle, a radio-controlled car with a mass of 5.8 kg was equipped with a gasoline-type engine that allows fast acceleration-deceleration and a maximum travel speed of 60 km/h. Such mini-vehicle was guided toward the spherical head of the collision test rig by using a piano-wire. Collision measurement equipment was installed to record the colloidal damper's impact hysteresis versus the vehicle's collision speed. Accuracy of the testing method was estimated by comparing the colloidal damper's dissipated energy relative to the kinetic energy of the car. Influence of the piston working speed on the hysteresis shape and the colloidal absorber's damping ability was estimated by comparing the results obtained during quasi-static and dynamic (sinusoidal excitation at different frequencies and impact) tests. Based on such results, one confirmed the ability of colloidal damper to work enclosed in the structure of a car bumper and it became possible to calculate the safety factor of the tested vehicle at frontal collision.
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