Comparison between 2D and 3D Simulation of Contact of Two Deformable Axisymmetric Bodies

Marat Dosaev 1 , Vitaly Samsonov 1 , 2  and Vladislav Bekmemetev 2
  • 1 Institute of Mechanics, Lomonosov Moscow State University, Michurinskiy pr-t,1, Moscow, Russian Federation
  • 2 Department of Theoretical Mechanics and Mechatronics, Lomonosov Moscow State University, Moscow, Russian Federation
Marat Dosaev
  • Corresponding author
  • Institute of Mechanics, Lomonosov Moscow State University, Michurinskiy pr-t,1, Moscow, 119192, Russian Federation
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, Vitaly Samsonov
  • Institute of Mechanics, Lomonosov Moscow State University, Michurinskiy pr-t,1, Moscow, 119192, Russian Federation
  • Department of Theoretical Mechanics and Mechatronics, Lomonosov Moscow State University, Moscow, Russian Federation
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and Vladislav Bekmemetev
  • Department of Theoretical Mechanics and Mechatronics, Lomonosov Moscow State University, Moscow, Russian Federation
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  • degruyter.comGoogle Scholar

Abstract

A portable pneumatic video-tactile sensor for determining the local stiffness of soft tissue and the methodology for its application are considered. The expected range of local elastic modulus that can be estimated by the sensor is 100 kPa–1 MPa. The current version of the device is designed to determine the characteristics of tissues that are close in mechanical properties to the skin with subcutis and muscles. A numerical simulation of the contact between the sensor head and the soft tissue was performed using the finite-element method. Both 2D and 3D models were developed. Results of experiments with device prototype are used for approval of adequacy of mathematical modelling in case of large deformations. Simulation results can be used to create soft tissue databases, which will be required to determine the local stiffness of soft tissues by the sensor. 2D model proved to be more efficient for the chosen range of values of local stiffness of soft tissues.

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The International Journal of Nonlinear Sciences and Numerical Simulation publishes original papers on all subjects relevant to nonlinear sciences and numerical simulation. The journal is directed at researchers in nonlinear sciences, engineers, and computational scientists, economists, and others, who either study the nature of nonlinear problems or conduct numerical simulations of nonlinear problems.

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