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Simulation of proposed FMVSS 202 using LS-DYNA Implicit

Federal Motor Vehicle Safety Standard 202 applies to automotive seat head restraints, and their attachment assemblies. The regulation is aimed at reducing the frequency and severity of neck injuries due to huge forces resulting from vehicle crashes. The main objective of this paper is to discuss the LS-DYNA IMPLICIT code vis-à-vis the simulation of the proposed FMVSS 202 regulation. The proposed changes to the FMVSS 202 standard incorporates a permanent set requirement for the head restraints. Since a quasi-static FE simulation cannot do permanent set calculations, LS-DYNA IMPLICIT code was used for this purpose. The paper explains in detail about the setting up of a seat model for the test, the various modeling techniques used and the correlation of results for the seat model.