scholarly journals A comparison of numerical methods used for finite element modelling of soft tissue deformation

2009 ◽  
Vol 44 (5) ◽  
pp. 391-406 ◽  
Author(s):  
P Pathmanathan ◽  
D Gavaghan ◽  
J Whiteley
Keyword(s):  
Finite Element ◽  
Soft Tissue ◽  
Numerical Methods ◽  
Finite Element Modelling ◽  
Tissue Deformation ◽  
Soft Tissue Deformation ◽  
Element Modelling

scholarly journals Key considerations for finite element modelling of the residuum–prosthetic socket interface

2020 ◽  
pp. 030936462096778
Author(s):  
JW Steer ◽  
PR Worsley ◽  
M Browne ◽  
Alex Dickinson
Keyword(s):  
Finite Element ◽  
Soft Tissue ◽  
Finite Element Modelling ◽  
Soft Tissues ◽  
Shear Stresses ◽  
Material Models ◽  
Element Modelling ◽  
Prosthetic Socket ◽  
Highly Nonlinear ◽  
Socket Interface

Background: Finite element modelling has long been proposed to support prosthetic socket design. However, there is minimal detail in the literature to inform practice in developing and interpreting these complex, highly nonlinear models. Objectives: To identify best practice recommendations for finite element modelling of lower limb prosthetics, considering key modelling approaches and inputs. Study design: Computational modelling. Methods: This study developed a parametric finite element model using magnetic resonance imaging data from a person with transtibial amputation. Comparative analyses were performed considering socket loading methods, socket–residuum interface parameters and soft tissue material models from the literature, to quantify their effect on the residuum’s biomechanical response to a range of parameterised socket designs. Results: These variables had a marked impact on the finite element model’s predictions for limb–socket interface pressure and soft tissue shear distribution. Conclusions: All modelling decisions should be justified biomechanically and clinically. In order to represent the prosthetic loading scenario in silico, researchers should (1) consider the effects of donning and interface friction to capture the generated soft tissue shear stresses, (2) use representative stiffness hyperelastic material models for soft tissues when using strain to predict injury and (3) interrogate models comparatively, against a clinically-used control.

scholarly journals Finite Element Model of Facial Soft Tissue. Deformation Following Surgical Correction.

1992 ◽  
Vol 34 (2) ◽  
pp. 111-122 ◽  
Author(s):  
Mitsuru MOTOYOSHI ◽  
Shigemi YAMAMURA ◽  
Akira NAKAJIMA ◽  
Akihiko YOSHIZUMI ◽  
Yoshinari UMEMURA ◽  
...  
Keyword(s):  
Finite Element ◽  
Soft Tissue ◽  
Finite Element Model ◽  
Element Model ◽  
Surgical Correction ◽  
Tissue Deformation ◽  
Facial Soft Tissue ◽  
Soft Tissue Deformation

Simulation for Needle Deflection and Soft Tissue Deformation in Needle Insertion

2010 ◽  
Vol 139-141 ◽  
pp. 889-892
Author(s):  
De Dong Gao ◽  
Hao Jun Zheng
Keyword(s):  
Finite Element ◽  
Soft Tissue ◽  
Three Dimensional ◽  
Needle Insertion ◽  
Tissue Deformation ◽  
Spring Model ◽  
Ansys Software ◽  
Soft Tissue Deformation ◽  
Needle Deflection ◽  
Element Method

Needle deflection and soft tissue deformation are the most important factors that affect accuracy in needle insertion. Based on the quasi-static thinking and needle forces, an improved virtual spring model and a finite element method are presented to analyze needle deflection and soft tissue deformation when a needle is inserted into soft tissue. According to the spring model, the trajectory of the needle tip is calculated with MATLAB using different parameters. With the superposed element method, the two and three dimensional quasi-static finite element models are created to simulate the dynamic process of soft tissue deformation using ANSYS software. The two methods will be available for steering the flexible needle to hit the target and avoid the obstacles precisely in the robot-assisted needle insertion.

Banded matrix approach to Finite Element modelling for soft tissue simulation

1999 ◽  
Vol 4 (3) ◽  
pp. 203-212 ◽  
Author(s):  
J. Berkley ◽  
S. Weghorst ◽  
H. Gladstone ◽  
G. Raugi ◽  
D. Berg ◽  
...  
Keyword(s):  
Finite Element ◽  
Soft Tissue ◽  
Finite Element Modelling ◽  
Matrix Approach ◽  
Element Modelling ◽  
Banded Matrix
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