Experimental and numerical damage evaluation of a lift safety gear Online publication date: Sun, 12-Oct-2008
by Marco Giglio, Andrea Manes
International Journal of Materials and Structural Integrity (IJMSI), Vol. 2, No. 3, 2008
Abstract: The aim of this paper is the experimental and numerical evaluation of the accumulated damage in a progressive lift safety gear, during its life cycle. In particular this evaluation has been carried out by means of experimental tests that reproduce exactly the emergency condition which activates the safety gear and with a detailed FE model of the component. Another purpose of these tests is to verify that the average deceleration (retardation) during gripping action lies between 0.2g and 1g (permissible limits) according to European Standard UNI EN 81-1 (1999). In particular the experimental tests, consisting in free falls of a test lift car with full load, and the following gripping phase caused by the safety gear activation, have been carried out evaluating the strains in the component and the car frame acceleration. The double approach, by test and with a numerical model, allows a better knowledge of this critical phenomenon.
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