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Identification of passive constitutive arterial tissue parameters from pressure myography based on inverse hyperelasticity

Okyar, Ali Fethi; Büyükkaya, Ömer Faruk; Karadağ, Cevat Volkan; Tuna, Bilge Güvenç

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<oai_dc:dc xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:oai_dc="http://www.openarchives.org/OAI/2.0/oai_dc/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/oai_dc/ http://www.openarchives.org/OAI/2.0/oai_dc.xsd">
  <dc:creator>Okyar, Ali Fethi</dc:creator>
  <dc:creator>Büyükkaya, Ömer Faruk</dc:creator>
  <dc:creator>Karadağ, Cevat Volkan</dc:creator>
  <dc:creator>Tuna, Bilge Güvenç</dc:creator>
  <dc:description>Changes in the mechanical properties of arteries due to growth, remodeling, or aging are related with cardiovascular diseases. These changes can quantitatively be assessed if a suitable set of biomaterial constitutive parameters could be fitted onto the in vitro response from pressure myography. In Simon et al (1970), a pressure-diameter dataset reflecting the internal pressurization stage was provided. However, this data did not include the excised state. We developed an analytical continuum-based computational procedure to pull the current state back to the excised (reference) state. Using this procedure the data was fitted to a simple exponential model, and a 56% decrease in the shear modulus and a 19% decrease in the exponential constant were observed. Similar observations were made for the hyperelastic fibre-reinforced continuum model by Holzapfel et al (2000). In conclusion, the parameter identification process may be hindered as a result of an incomplete or partial dataset. Inverse deformation mapping may be used to
produce the missing data.</dc:description>
  <dc:subject>soft-tissue biomechanics</dc:subject>
  <dc:subject>parameter identification</dc:subject>
  <dc:subject>inverse deformation</dc:subject>
  <dc:subject>vasculatory system</dc:subject>
  <dc:subject>finite element analysis</dc:subject>
  <dc:title>Identification of passive constitutive arterial tissue parameters from pressure myography based on inverse hyperelasticity</dc:title>
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