Hybrid III six-year-old (6YO) child dummy head model was developed and validated for frontal impact assessment according to\nthe specifications contained in Code of Federal Regulations, Title 49, Part 572.122, Subpart N by Livermore Software Technology\nCorporation (LSTC). This work is aimed at improving biofidelity of the head for frontal impact and also extending its application to\nlateral impact assessment bymodifying the head skin viscoelastic properties and validating the head response using the scaled nineyear-\nold (9YO) child cadaver head response recently published in the literature. The modified head model was validated for two\ndrop heights for frontal, right, and left parietal impact locations. Peak resultant acceleration of the modified head model appeared\nto have good correlation with scaled 9YO child cadaver head response for frontal impact on dropping from 302mm height and\nfair correlation with 12.3% difference for 151mm drop height. Right parietal peak resultant acceleration values correlate well with\nscaled 9YO head experimental data for 153mm drop height, while fair correlation with 16.4% difference was noticed for 302mm\ndrop height. Left parietal, however, shows low biofidelity for the two drop heights as the difference in head acceleration response\nwas within 30%. The modified head model could therefore be used to estimate injuries in vehicle crash for head parietal impact\nlocations which cannot be measured by the current hybrid III dummy head model.
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