Možnosti prilagoditve poškodbenih kriterijev populaciji otrok z uporabo numeričnega anatomskega modela otroka izbrane starosti : doktorska disertacija

slovenian

doktorska dela

2013

Univerza v Mariboru, Fakulteta za strojništvo

ATDs and ICs are crucial for the development of new car crash safety devices. Current ICs are defined on grounds of experimental data belonging to the adultpopulation and are therefore questionable for the child population. Experimental data for the child population is very limited because of ethical reasons, so it's reasonable to use adjusted data of the adult population. IC thresholds have already been adapted to children or more exactly child ATDs. But modified thresholds are questionable, as child ATDs are mechanical devicesthat only roughly cover the anatomy of real children. This study was therefore aimed towards the determination of possibilities and limitations in adjusting ICs for the child population, using a child human model with all anatomic and anthropometric peculiarities of a child of selected age. The first part of the study included an anatomic and anthropometric analysis of the child population, where age groups and statistical representatives were defined. In the second part, a new human model of a child with all anatomic peculiarities of 6 year old and anthropometric features of the 5th percentile statistical representative of age group 4-7 years was developed. For highest possible biofidelity of the developed model, geometry reconstruction was done for all crucial body structures and tissues. Also, new modeling principles were developed for joints. In the last part of the study, loading of the developed model (NAMO6.5) was simulated. Results showed good response and confirmed high biofidelity and total functionality of the model. Using NAMO6.5, adjustment options of chosen ICs (HIC, ThCC) for the child populationwere examined. Because both ICs revealed major imperfections, injuries were evaluated on grounds of stress and strain in body tissue. Results showed that the development of new IC based on stress and strain is more reasonable that adjusting ICs for the child population.

08.08.2023