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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

Boundary Element Formulation for General Viscoelastic Solids

AuthorsH Ashrafi - M Farid
Conference Title7th Annual International Conference of Iranian Aerospace Society – Aero2008
Holding Date of Conference2008-2-19
Event PlaceSharif University of Technology
PresentationSPEECH
Conference LevelInternational Conferences

Abstract

From basic assumptions of viscoelastic constitutive relations and weight residual techniques, a simple but effective Boundary Element formulation is implemented for the Kelvin viscoelastic solid model. This approach avoids the use of relaxation functions and makes easier changes in natural or essential boundary conditions along the time. Imposing spatial approximations and adopting convenient kinematical relations for strain velocities, a system of time differential equations is derived. The aim of this paper is to implement viscoelastic behavior in a time domain approach as well. Another important feature of the derived formulation is the absence of domain discretizations, which simplify the treatment of problems involving infinite domains (the half-space problems). At the end of this paper, a numerical example is provided to validate the formulation which compared to analytical solutions.