201. Mechanical characterization of alternating slit, I-shaped and rotating triangle based auxetic skin graft phantoms.
- Author
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Gupta, Vivek and Chanda, Arnab
- Abstract
Split thickness skin grafting is one of the common skin transplantation techniques employed in treating severe burn injuries. Recent experimental studies have shown that the expansions offered by split thickness skin grafts are much lower than what is claimed by the graft manufacturers. To date, limited studies have investigated the effect of slit patterns on the expansions and the possibility of material innovation. This work has experimentally tested novel auxetic slit patterns on a biofidelic skin simulant to evaluate their effect on skin graft expansion. A wide range of variants of alternating slit (AS), I-shaped (IS), and Rotating Triangle (RT) based auxetic patterns were tested. A biaxial testing device was employed to simulate realistic skin stretching during graft implementation. The deformation, expansion, stress-strain response, void area, and maximum gap size were estimated, and the material behavior was also modeled using hyperelastic curve fit coefficients. The key design parameters were determined, which would produce high expansion with minimal voids. The findings of this study are anticipated to throw light on the possibility of using auxetic slit patterns for generating higher expansions in split thickness skin grafts. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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