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JRM Vol.23 No.4 pp. 589-597
doi: 10.20965/jrm.2011.p0589
(2011)

Paper:

Stable Soft-Tissue Fracture Simulation for Surgery Simulator

Masano Nakayama*, Satoko Abiko**, Xin Jiang**,
Atsushi Konno**, and Masaru Uchiyama**

*Department of Aerospace Engineering, Graduate School of Engineering, Tohoku University

**Department of Mechanical Systems and Design, Graduate School of Engineering, Tohoku University, 6-6-01 Aoba-yama, Sendai 980-8579, Japan

Received:
October 8, 2010
Accepted:
May 1, 2011
Published:
August 20, 2011
Keywords:
fracture, surgery simulation, FEM, soft tissue
Abstract

Soft-tissue fracture simulation is a key to surgery simulation virtually reproducing cutting, dissection, and removal. Soft-tissue fracture is modeled by finite element fracture in which elements are removed if their stress exceeds a specified fracture stress. Removing elements without considering connection to adjacent elements may produce structurally unstable elements, that cause computational instability. We propose geometric limitation and element fracture method to avoid this instability. We confirmed the feasibility of our proposals by comparing blunt dissection simulation results to blunt dissection experiment results using agar.

Cite this article as:
Masano Nakayama, Satoko Abiko, Xin Jiang,
Atsushi Konno, and Masaru Uchiyama, “Stable Soft-Tissue Fracture Simulation for Surgery Simulator,” J. Robot. Mechatron., Vol.23, No.4, pp. 589-597, 2011.
Data files:
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