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Hossein Ashrafi

Hossein Ashrafi

Assistant Professor

College: Faculty of Mechanical Engineering

Department: Mechanical Engineering - Solid Design

Degree: Ph.D

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Hossein Ashrafi

Assistant Professor Hossein Ashrafi

College: Faculty of Mechanical Engineering - Department: Mechanical Engineering - Solid Design Degree: Ph.D |

  •  Position: Assistant Professor of Solid Mechanics and Applied Design
  •  Institution: Faculty of Mechanical Engineering, University of Kashan, Iran
  •  Researcher ID: P-8090-2014
  •  Scopus Author ID: 12793997500
  •  M.Sc. (Sept. 2005 – August 2008): Graduated from Shiraz University, with Overall GPA 17.67 out of 20.
  •  Ph.D. (Sept. 2010 – August 2014): Graduated from K.N. Toosi University, with Overall GPA 19.43 out of 20.
  • Address: No. 316, 3rd Floor, Faculty of Mech. Eng., University of Kashan, Ghotbravandi Blvd., Kashan, Iran
  • ​P.O. Box:  8731751167
  • Telephone:  (+98) 31 55913439
  • Fax:  (+98) 31 55913444
  • URL:  https://faculty.kashanu.ac.ir/hashrafi/en​

 

نمایش بیشتر

A mathematical approach for describing the time-dependent Poisson's ratio of viscoelastic ligaments mechanical characteristics of biological tissues

AuthorsH Ashrafi - M Shariyat
Conference TitleIEEE 17th Iranian Conference on Biomedical Engineering
Holding Date of Conference2010-11-3
Event Placeاصفهان
PresentationSPEECH
Conference LevelInternational Conferences

Abstract

In biological engineering, the majority of soft tissues exhibit as viscoelastic materials with a time-dependent response. Therefore, the Poisson’s ratios for viscoelastic materials are time dependent (in time domain) or complex frequency dependent (in frequency domain) quantities. The main aim of this work is to develop a mathematical model capable of determining the time-dependent Poisson’s ratios based on the stress relaxation and the creep tests for viscoelastic ligaments. The Poisson’s ratios of periodontal ligaments have been obtained as increasing functions of time, because their shear modulus relaxes much more than their bulk modulus.

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