Academic Positions

  • 2015 2010

    Teaching Assistant

    USC, Department of Mathematics

  • 2010 2009

    Teaching Assistant

    USC, Viterbi School of Engineering

Education & Training

  • Ph.D. 2015

    Ph.D. in Mechanical Engineering

    University of Southern California

  • M.S.2010

    Master of Science in Mechanical Engineering

    University of Southern California

  • B.S.2008

    Bachelor of Science in Mechanical Engineering

    Iran University of Science and Technology

Honours, Awards and Grants

  • 2015
    Outstanding Graduate
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    Association of Professors and Scholars of Iranian Heritage
  • 2010-2015
    Full Scholarship Award and Waived Tuition Fees
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    University of Southern California
  • 2010
    International Student Academic Achievement Award
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    University of Southern California
  • 2008
    Graduated with distinction and recognized as the top undergraduate student
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    Iran University of Science and Technology
  • 1998-2004
    Studied in a high school dedicated to exceptional talented students)
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    National Organization for Development of Exceptional Talents

Postdoctoral fellow

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Research Assistant

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Research Projects

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    Shock Absorber Dental Implant

    Very short description of the project.

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    Stress Concentration

    Very short description of the project.

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    Title of Project

    Very short description of the project.

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    Title of Project

    Very short description of the project.

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    Title of Project

    Very short description of the project.

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    Title of Project

    Very short description of the project.

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Potential use of polycarbonate-urethane matrix reinforced with polyethylene fibers for shock-absorbing dental implants

Ramtin Sheikhhassani, Pasha Anvari, Simin Taei, Yasmin Sheikhhassani
Journal PaperJournal of Medical Hypotheses (Accepted), May 2015

Abstract

The absence of a shock-absorbing mechanism in commercial dental implants is a likely factor in the resulting bone loss and possible implant failure. The aim of the current study is to generate a shock-absorbing dental implant that resembles the periodontal ligament, which naturally absorbs occlusal overloading forces. To achieve this, a polycarbonate-urethane composite reinforced with polyethylene fibers will be constructed. Tests based on finite element analysis and mechanical testing are proposed to further examine this novel implant type.

Scattering of a plane harmonic SH-wave and dynamic stress concentration for multiple multilayered inclusions embedded in an elastic half-space

Ramtin Sheikhhassani,
ThesisUniversity of Southern California, May 2015

Abstract

The scattering of a plane harmonic SH-wave by an arbitrary number of layered inclusions in a half-space is investigated by a direct boundary integral equation method. The inclusions, which have arbitrary shape and arrangement, are embedded within an elastic half-space. The effects of multiple scattering, the geometry, and the impedance contrast of the materials for layered inclusions and pipes, on the surface motion, are considered in detail. Additionally, a non-hypersingular technique is employed to calculate the dynamic stress concentration factor along the interfaces of inclusions. Various contributing factors that can influence the stress concentration, including multiple scattering, the impedance contrast of layers, and the separation distance between the scatterers, are investigated. The numerical results are presented for a wide range of parameters present in the problem.

Scattering of a plane harmonic SH wave by multiple layered inclusions

Ramtin Sheikhhassani, Marijan Dravinski
Journal Paper Journal of Wave Motion, Volume 51, Issue 3, April 2014, Pages 517-532

Abstract

Scattering of a plane harmonic SH wave by an arbitrary number of layered inclusions in a half-space is investigated by using a direct boundary integral equation method. The inclusions of arbitrary shape and placement are embedded within an elastic half-space. The effects of multiple scattering, the geometry, and the impedance contrast of the materials for layered inclusions and pipes are considered in detail.

Scattering of a plane harmonic SH wave by a rough multilayered inclusion of arbitrary shape

Marijan Dravinski, Ramtin Sheikhhassani
Journal Paper Journal of Wave Motion, Volume 50, Issue 4, June 2013, Pages 836–851

Abstract

Steady-state scattering of a plane harmonic SH wave by a multilayered inclusion of arbitrary shape consisting of a general number of homogeneous isotropic layers, embedded within a half space, is investigated by using a direct boundary integral equation approach. The layer interfaces are assumed to be either smooth or periodically corrugated without any sharp corners being present. The peak corrugation amplitude is arbitrarily prescribed. The corresponding integral equations are derived in terms of the unknown boundary displacements and tractions. The integral equations are discretized using linear elements leading to a system of linear algebraic equations which are solved by using the standard Gauss elimination procedure.

Testing of the numerical results is performed by comparing the surface response of a cavity with those available in the literature. The tests show excellent agreement between the two results for different frequencies and angles of incidence.

The numerical results include surface response of multilayered inclusions and pipes. The inclusion layers are assumed to be either softer or stiffer from the half space. The pipe layers include both soft–stiff and stiff–soft combinations of the materials.

The layered inclusion results demonstrate that for the soft materials the presence of layers may significantly change the surface response when compared to the corresponding homogeneous inclusion motion. For stiff layers this effect is greatly reduced. The same phenomenon has been observed for the inclusions with periodically corrugated interfaces as well.

The surface response of a layered pipe is found to strongly depend upon the nature of the incident wave and the materials of the layers.

Theoretical Analysis of Tube Hydroforming of Round Tubes into Square Sections

Ramtin Sheikhhassani, Mohammad Farahani, Hamed Deilami Azodi
Conference Paper AMPT, 2009

Currrent Teaching

  • 2015 2010

    MATH 245 Mathematics of Physics and Engineering

    Ordinary Differential Equations

  • 2015 2010

    Math 226 Calculus III

    Multi-variable calculus

  • 2011 2012

    AME 509 Applied Elasticity

    Condensed treatment dealing with engineering applications of the principles of elasticity, using the theories of elasticity, elastic stability, and plates and shells.

At My Office

You can find me at my office located at University of Southern California

At My Work

You can find me at my Work located at University of Southern California

I am at my office every day from 7:00 until 10:00 am, but you may consider a call to fix an appointment.

At My Lab

You can find me at my office located at VHE 213

I am at my office on Tuesdays and Wednesdays day from 5:00 until 6:00 pm, in MathCenter KAP 263 but you may consider an email to fix an appointment.

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