scholarly journals Teletactile System Based on Mechanical Properties Estimation

2011 ◽  
Vol 8 (2) ◽  
pp. 237-252
Author(s):  
Mauro M. Sette ◽  
Hendrik Van Brussel ◽  
Jos Vander Sloten
Keyword(s):  
Mechanical Properties ◽  
Estimation Algorithm ◽  
Feedback System ◽  
Element Model ◽  
Tactile Feedback ◽  
Haptic Interface ◽  
Minimally Invasive Procedures ◽  
Invasive Procedures ◽  
New Approach ◽  
Missing Feature

Tactile feedback is a major missing feature in minimally invasive procedures; it is an essential means of diagnosis and orientation during surgical procedures. Previous works have presented a remote palpation feedback system based on the coupling between a pressure sensor and a general haptic interface. Here a new approach is presented based on the direct estimation of the tissue mechanical properties and finally their presentation to the operator by means of a haptic interface. The approach presents different technical difficulties and some solutions are proposed: the implementation of a fast Young’s modulus estimation algorithm, the implementation of a real time finite element model, and finally the implementation of a stiffness estimation approach in order to guarantee the system’s stability. The work is concluded with an experimental evaluation of the whole system.

Mechanical properties of FeAlSi powders prepared by mechanical alloying from different initial feedstock materials

2019 ◽  
Vol 107 (2) ◽  
pp. 207 ◽  
Author(s):  
Jaroslav Čech ◽  
Petr Haušild ◽  
Miroslav Karlík ◽  
Veronika Kadlecová ◽  
Jiří Čapek ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Mechanical Alloying ◽  
Young’S Modulus ◽  
Milling Time ◽  
Young's Modulus ◽  
Element Model ◽  
X Ray Diffraction ◽  
X Ray ◽  
Powder Particles ◽  
Complete Homogenization

FeAl20Si20 (wt.%) powders prepared by mechanical alloying from different initial feedstock materials (Fe, Al, Si, FeAl27) were investigated in this study. Scanning electron microscopy, X-ray diffraction and nanoindentation techniques were used to analyze microstructure, phase composition and mechanical properties (hardness and Young’s modulus). Finite element model was developed to account for the decrease in measured values of mechanical properties of powder particles with increasing penetration depth caused by surrounding soft resin used for embedding powder particles. Progressive homogenization of the powders’ microstructure and an increase of hardness and Young’s modulus with milling time were observed and the time for complete homogenization was estimated.

Data fusion for a hand prosthesis tactile feedback system

2014 ◽  
Author(s):  
Huaiqi Huang ◽  
Christian Enz ◽  
Martin Grambone ◽  
Jorn Justiz ◽  
Tao Li ◽  
...  
Keyword(s):  
Data Fusion ◽  
Feedback System ◽  
Tactile Feedback ◽  
Hand Prosthesis

Treatment of varicocele with reference to age: a retrospective comparison of three minimally invasive procedures

2006 ◽  
Vol 21 (1) ◽  
pp. 61-65 ◽  
Author(s):  
S. Beutner ◽  
M. May ◽  
B. Hoschke ◽  
C. Helke ◽  
M. Lein ◽  
...  
Keyword(s):  
Minimally Invasive ◽  
Minimally Invasive Procedures ◽  
Invasive Procedures ◽  
Retrospective Comparison

Effect of Interfacial Properties on the Mechanical Behavior of Bone-Like Materials: A Numerical Study

2017 ◽  
Vol 09 (01) ◽  
pp. 1750014 ◽  
Author(s):  
Xingguo Li ◽  
Bingbing An ◽  
Dongsheng Zhang
Keyword(s):  
Mechanical Properties ◽  
Plastic Deformation ◽  
Numerical Study ◽  
Element Model ◽  
Interfacial Behavior ◽  
Yield Behavior ◽  
Bonding Property ◽  
The Matrix ◽  
Bonding Properties ◽  
Superior Mechanical Properties

Interfacial behavior in the microstructure and the plastic deformation in the protein matrix influence the overall mechanical properties of biological hard tissues. A cohesive finite element model has been developed to investigate the inelastic mechanical properties of bone-like biocomposites consisting of hard mineral crystals embedded in soft biopolymer matrix. In this study, the complex interaction between plastic dissipation in the matrix and bonding properties of the interface between minerals and matrix is revealed, and the effect of such interaction on the toughening of bone-like biocomposites is identified. For the case of strong and intermediate interfaces, the toughness of biocomposites is controlled by the post yield behavior of biopolymer; the matrix with low strain hardening can undergo significant plastic deformation, thereby promoting enhanced fracture toughness of biocomposites. For the case of weak interfaces, the toughness of biocomposites is governed by the bonding property of the interface, and the post-yield behavior of biopolymer shows negligible effect on the toughness. The findings of this study help to direct the path for designing bioinspired materials with superior mechanical properties.

The Radius Surgical System – A New Device for Complex Minimally Invasive Procedures in Urology?

2007 ◽  
Vol 51 (4) ◽  
pp. 1015-1022 ◽  
Author(s):  
Thomas Frede ◽  
Ahmed Hammady ◽  
Jan Klein ◽  
Dogu Teber ◽  
Noriyuki Inaki ◽  
...  
Keyword(s):  
Minimally Invasive ◽  
Minimally Invasive Procedures ◽  
Invasive Procedures ◽  
New Device ◽  
System A ◽  
Radius Surgical System ◽  
Surgical System
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