Abstract
The new double-seated sled assembly is designed to be used for dynamic tests (crash/impact test) similarly to ECE R16 regulation (Safety of belts and restraint systems). The objective of this study is to perform a numerical simulation (using the Finite Element Method) of the impact study of this sled design, to verify the integrity of the sled structure during and after frontal impact.
The sled pulse (sled deceleration curve as a function of time, measured for single sled) was provided by Takata-Petri SRL and applied on the frontal profile of the sled. The Finite element model of the sled assembly include also the dummy, in the seating position. An initial velocity of 50 km/h was assumed for this study.
During the impact simulation of the sled, equivalent (Von Mises) stresses in the sled structure (longitudinal and transversal profiles) were captured and used to evaluate the strength of the structure at impact forces. This study concluded that the new sled design will sustain the impact loads.
Based on the results obtained on the virtual prototype, the double seated sled assembly was created and tests were performed. The tests show that the sled is functional.
Keywords: Sled prototype, ANSYS LS-DYNA, crash/impact simulation, automotive standards