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- W602482263 abstract "The purpose with this report has been to make a finite element model of a baby dummy, a baby seat and a test sledge and analyse this mechanical system in the explicity FE-code LS-DYNA3D. This report mainly concerns these FE-models. Furthermore, it also presents the used programs: the preprocessor LS-INGRID, the FE- code LS-DYNA3D and the postprocessor LS- TAURUS. The geometry model of the dummy is built of 16 ellipsoids, connected to each other with joints. Certain restrictions on admissible motions have been made to avoid unnatural behaviour. The geometry of the baby seat is built of 14 parts. The geometry model of the test sledge is made of 4 different parts. The different models - the dummy, the baby seat and the test sledge defined in local coordinate systems - were transformed to the right positions and directions for the simulation in a global coordinate systems. A simulation of the system was then performed with an initial velocity 13.44 m/s of all components. A retardation pulse was given to certain components of the tests sledge. The retardation curves of the dummy head and the upper torso were compared to the curves from the real tests. This comparison shows good agreement up to about 130 ms. The simulated motion of the dummy was compared with a video recording to the real test. One cannot expect hundred percentage agreement between test and simulation results mainly because the FE-analysis is a simplified model of the reality. Certain test criteria have been checked during the calculation. The HIC (Head Injury Criterion) of the dummy head has been determined, and the maximum acceleration of the upper torso has been estimated. The pressure distribution on the seat stuffing has also been studied." @default.
- W602482263 created "2016-06-24" @default.
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- W602482263 date "1992-01-01" @default.
- W602482263 modified "2023-09-26" @default.
- W602482263 title "FINITE ELEMENT MODEL OF A BABY DUMMY, A BABY SEAT AND A TEST SLEDGE" @default.
- W602482263 hasPublicationYear "1992" @default.
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