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Title:MOŽNOSTI PRILAGODITVE POŠKODBENIH KRITERIJEV POPULACIJI OTROK Z UPORABO NUMERIČNEGA ANATOMSKEGA MODELA OTROKA IZBRANE STAROSTI
Authors:ID Noč, Iztok (Author)
ID Flašker, Jože (Mentor) More about this mentor... New window
ID Kegl, Marko (Comentor)
ID Balažic, Jože (Comentor)
Files:.pdf DR_Noc_Iztok_2013.pdf (8,42 MB)
MD5: FEA383D2C1E90F71C2FF36491AB91E74
 
Language:Slovenian
Work type:Dissertation
Typology:2.08 - Doctoral Dissertation
Organization:FS - Faculty of Mechanical Engineering
Abstract:ATD-ji in PK so ključni pri snovanju rešitev za preprečitev poškodb. Obstoječi PK so definirani na podlagi eksperimentalnih podatkov, ki pripadajo populaciji odraslih ljudi. Zato je primernost obstoječih PK za populacijo otrok vprašljiva. Ker je pridobivanje eksperimentalnih podatkov za populacijo otrok iz etičnih razlogov skoraj neizvedljivo, je smiselno razmišljati o ustrezni modifikaciji podatkov, ki pripadajo populaciji odraslih ljudi. Mejne vrednosti PK so že bile prilagojene populaciji otrok oz. otroškim ATD-jem. A ustreznost modificiranih vrednosti je še vedno vprašljiva, saj so otroški ATD-ji mehanske naprave, ki le grobo opisujejo anatomijo otrok. Zato je bilo raziskovalno delo usmerjeno v pregled možnosti in omejitev modifikacije obstoječih PK za populacijo otrok z uporabo numeričnega anatomskega modela otroka, ki upošteva vse ključne anatomske in antropometrične posebnosti celotnega telesa otroka izbrane starosti. V prvi fazi raziskovalnega dela je bila opravljena antropometrična in anatomska analiza populacije otrok, v kateri so bile določene starostne skupine in statistični predstavniki otrok. V drugi fazi je bil razvit numerični anatomski model otroka, ki upošteva vse anatomske posebnosti 6 letnega otroka in z antropometričnega vidika ustreza 5 percentilnemu statističnemu predstavniku otrok v starostni skupini 4-7 let. Z namenom doseganja čim višje stopnje biološke ustreznosti modela, je bila izvedena rekonstrukcija vseh ključnih telesnih tkiv in struktur, razviti pa so bili tudi novi principi modeliranja sklepov. V zadnji fazi raziskovalnega dela so bile izvedene simulacije obremenjevanja razvitega modela (NAMO6.5). Rezultati simulacij so pokazali dober odziv in potrdili visoko biološko ustreznost ter polno funkcionalnost modela. S pomočjo modela je bila izvedena ocena možnosti in omejitev modifikacije izbranih PK (HIC, ThCC) populaciji otrok. Ker sta izbrana PK pokazale pomembne pomanjkljivosti,so bile poškodbe ocenjene še na podlagi raztezka in napetosti v telesnem tkivu. Rezultati so pokazali, da je razvoj novih PK na osnovi raztezka in napetosti bolj smiseln kot modifikacija obstoječih PK.
Keywords:biomehanika otrok, poškodbeni kriterij, metoda končnih elementov, anatomski model
Place of publishing:[Maribor
Publisher:I. Noč]
Year of publishing:2013
PID:20.500.12556/DKUM-40858 New window
UDC:572.087+616-071.3(043.3)
COBISS.SI-ID:17065494 New window
NUK URN:URN:SI:UM:DK:IASMPCWB
Publication date in DKUM:19.08.2013
Views:2054
Downloads:227
Metadata:XML DC-XML DC-RDF
Categories:KTFMB - FS
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Secondary language

Language:English
Title:ADJUSTMENT OPTIONS OF INJURY CRITERIA FOR THE CHILD POPULATION USING A HUMAN MODEL FOR A CHILD OF A SELECTED AGE
Abstract: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 adult population 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 devices that 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 population were 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.
Keywords:child (infant) biomechanics, injury criteria, finite element method (modeling), human model


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