The mechanics of soft biological composites. | |
Nguyen, Thao D. (Sandia National Laboratories, Livermore, CA) ; Grazier, John Mark ; Boyce, Brad Lee ; Jones, Reese E. (Sandia National Laboratories, Livermore, CA) | |
Sandia National Laboratories | |
关键词: Tissues-Analysis.; Design Biological Models.; Mechanics; Fibers; Prostheses; | |
DOI : 10.2172/922773 RP-ID : SAND2007-6191 RP-ID : AC04-94AL85000 RP-ID : 922773 |
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美国|英语 | |
来源: UNT Digital Library | |
【 摘 要 】
Biological tissues are uniquely structured materials with technologically appealing properties. Soft tissues such as skin, are constructed from a composite of strong fibrils and fluid-like matrix components. This was the first coordinated experimental/modeling project at Sandia or in the open literature to consider the mechanics of micromechanically-based anisotropy and viscoelasticity of soft biological tissues. We have exploited and applied Sandia's expertise in experimentation and mechanics modeling to better elucidate the behavior of collagen fibril-reinforced soft tissues. The purpose of this project was to provide a detailed understanding of the deformation of ocular tissues, specifically the highly structured skin-like tissue in the cornea. This discovery improved our knowledge of soft/complex materials testing and modeling. It also provided insight into the way that cornea tissue is bio-engineered such that under physiologically-relevant conditions it has a unique set of properties which enhance functionality. These results also provide insight into how non-physiologic loading conditions, such as corrective surgeries, may push the cornea outside of its natural design window, resulting in unexpected non-linear responses. Furthermore, this project created a clearer understanding of the mechanics of soft tissues that could lead to bio-inspired materials, such as highly supple and impact resistant body armor, and improve our design of human-machine interfaces, such as micro-electrical-mechanical (MEMS) based prosthetics.
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