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Measurement of Thermal Diffusivity of Bovine Aorta Subject to Finite Deformation a
Author(s) -
DOSS DAVID J.,
HUMPHREY JAY D.,
WRIGHT NEIL T.
Publication year - 1998
Publication title -
annals of the new york academy of sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.712
H-Index - 248
eISSN - 1749-6632
pISSN - 0077-8923
DOI - 10.1111/j.1749-6632.1998.tb10143.x
Subject(s) - thermal diffusivity , laser flash analysis , materials science , flash (photography) , thermodynamics , mechanics , finite difference method , descending aorta , finite difference , composite material , aorta , diffusion equation , biomedical engineering , optics , mathematics , mathematical analysis , physics , engineering , surgery , medicine , metric (unit) , operations management
The flash thermal diffusivity measurement technique is applied to tissue for the first time. Making use of its minimal contact with the specimen, the flash technique is extended to allow for well‐defined, biaxial, finite strain. As an example application, the radial component of thermal diffusivity of bovine descending aorta is measured in vitro as a function of equibiaxial stretch, at room temperature. Data analysis is accomplished using a Marquardt algorithm coupled with a finite difference solution of the thermal diffusion equation. Extension of this method to measure simultaneously three orthogonal components of diffusivity, at different levels of temperature, is discussed.