Model characteristics of a finite element deformable featureless headform with one to four layers of solid elements for the headform skin are studied using both the LS-DYNA3D and FCRASH codes. The models use a viscoelastic material law whose constitutive parameters are established through comparisons of drop test simulations at various impact velocities with the test data. Results indicate that the one-layer model has a significant distinct characteristic from the other (2-to-4-layer) models, thus requiring different parametric values. Similar observation is also noticed in simulating drop tests with one and two layers of solid elements for the headform skin using PAM-CRASH. When using the same parametric values for the viscoelastic material, both the LS-DYNA3D and FCRASH simulations yield the same results under identical impact conditions and, thereby, exhibit a “functional equivalency” between these two codes.In addition, the effects of viscoelastic parameters on the headform responses are studied. Further utilization of these models in upper vehicle interior structural simulations yields comparable results regardless of which deformable featureless headform (i.e. 1- to 4-layer models) is used as an impactor.
Additional Notes on Finite Element Models of Deformable Featureless Headform
Sae Technical Papers
International Congress & Exposition ; 1997
1997-02-24
Conference paper
English
Additional notes on finite element models of deformable featureless headform
Automotive engineering | 1997
|Validation of FMVSS201 Featureless Headform Finite Element Model for Rotational Acceleration
British Library Conference Proceedings | 2001
|Development and Validation of A Deformable Featureless Headform Model Using LS-DYNA3D
British Library Conference Proceedings | 1996
|Development of a Featureless Free-Motion Headform
SAE Technical Papers | 1991
|