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A three-dimensional large deformation model for soft tissue using meshless method
Mohammad Reza Dehghan1, Abdolreza Rahimi1, Heidar Ali Talebi2,3
1Mechanical Engineering Department, Amirkabir University of Technology, Tehran, Iran.
Background:
Recently, a great number of studies have been carried out to model soft tissue deformation in contact with surgical instruments to aid the development of surgical simulators. Precise methods to model the soft tissue such as the Finite Element Method (FEM) lack accuracy in large deformations.
Methods:
An innovative meshless method is used, which has high precision and is applicable to large deformations. The meshless simulation method is implemented for a 2D beam and a 3D cube. Experiments are conducted for two silicone-gel samples to verify the correctness of the method.
Results:
The meshless results in 2D and 3D show better accuracy for large deformations in comparison with the FEM. This method is used to model human organs such as liver and gallbladder.
Conclusion:
It is concluded that the proposed model exhibits good accuracy as well as speed. Thus, it seems promising to be employed in surgical simulators. Copyright © 2015 John Wiley & Sons, Ltd.
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