scholarly journals Effect of bone material properties on effective region in screw-bone model: an experimental and finite element study

2014 ◽  
Vol 13 (1) ◽  
pp. 83 ◽  
Author(s):  
Shuai Liu ◽  
Wei Qi ◽  
Yang Zhang ◽  
Zi-Xiang Wu ◽  
Ya-Bo Yan ◽  
...  
Keyword(s):  
Finite Element ◽  
Material Properties ◽  
Bone Material ◽  
Bone Material Properties ◽  
Bone Model ◽  
Finite Element Study ◽  
Element Study

A new approach for assigning bone material properties from CT images into finite element models

2010 ◽  
Vol 43 (5) ◽  
pp. 1011-1015 ◽  
Author(s):  
G. Chen ◽  
B. Schmutz ◽  
D. Epari ◽  
K. Rathnayaka ◽  
S. Ibrahim ◽  
...  
Keyword(s):  
Finite Element ◽  
Material Properties ◽  
Ct Images ◽  
Finite Element Models ◽  
Bone Material ◽  
New Approach ◽  
Bone Material Properties

Validity of the reduced modulus concept to describe indentation loading response for elastoplastic materials with sharp indenters

2009 ◽  
Vol 24 (3) ◽  
pp. 998-1006 ◽  
Author(s):  
In-suk Choi ◽  
Oliver Kraft and Ruth Schwaiger
Keyword(s):  
Finite Element ◽  
Material Properties ◽  
Experimental Results ◽  
Finite Element Study ◽  
Reduced Modulus ◽  
Material Systems ◽  
Parametric Studies ◽  
Elastoplastic Materials ◽  
Sharp Indentation ◽  
Element Study

Recent computational parametric studies have developed reverse algorithms to extract material properties of elastoplastic materials using experimental sharp nanoindentation. These methods used reduced modulus in their parameters to include the effect of indenter compliance. To investigate the validity of using reduced modulus, we conducted experimental indentation of a couple of representative cases for elastoplastic metals with a diamond and a sapphire Berkovich tip. Then, we performed a finite element study for sharp indentation of the same material systems. Both computational and experimental results indicate that the use of reduced modulus is invalid to describe indentation loading response for elastoplastic materials in a certain material regime. Our results show that indenter compliance is overestimated by the previous predictions using reduced modulus. This overestimation leads to underestimation of indenter curvature and causes error in extracting material properties by reverse algorithms.

scholarly journals Different material properties of cancellous bone influence analysis of glenoid component loosening: A finite element study

2017 ◽  
Vol 13 (4-2) ◽  
pp. 483-488 ◽  
Author(s):  
Abdul Hadi Abdul Wahab ◽  
Mohammed Rafiq Abdul Kadir ◽  
Muhammad Noor Harun ◽  
Ardiyansyah Syahrom ◽  
Mohammad Hanif Ramlee
Keyword(s):  
Finite Element ◽  
Cancellous Bone ◽  
Material Properties ◽  
Total Shoulder Arthroplasty ◽  
Glenoid Component ◽  
Finite Element Study ◽  
Bone Properties ◽  
Wrong Prediction ◽  
Component Loosening ◽  
Element Study

Glenoid component loosening is one of common complications after total shoulder arthroplasty. In investigating the glenoid component loosening, the finite element study is one of methods that have been utilised by experts. Therefore, assigning material properties for all finite element models become crucial to avoid any misinterpretation which, later, lead to wrong prediction on the performance of glenoid implant. This study was conducted to achieve two objectives; (1) to analyse the effect of different bone properties towards micromotion and stress at implant and cement, and (2) to clarify simplification of bone properties in evaluating glenoid component loosening. A load of 750N was simulated at three different glenoid locations (centre – C, superior-anterior-SA, superior-posterior-SP) which imitate concentric and eccentric loadings for elderly people daily activities. Our result showed that large different in micromotion and stress at implant between orthotropic model and another two model (isotropic and full cortical) does not allow simplification for assigning material properties for bone. Thus, assigning cancellous bone as orthotropic material was a realistic material property to represent the real bone condition in evaluating glenoid implant loosening.

scholarly journals Orientation definition of anisotropy is important to finite element simulation of bone material properties

2008 ◽  
Author(s):  
Haisheng Yang ◽  
Tongtong Guo ◽  
Xin Ma
Keyword(s):  
Finite Element ◽  
Finite Element Simulation ◽  
Material Property ◽  
Material Properties ◽  
Great Influence ◽  
Biomechanical Analysis ◽  
Von Mises Stress ◽  
Bone Material ◽  
Bone Material Properties ◽  
Element Simulation

The assignment of bone material properties to finite element model is a fundamental step in finite element analysis and has great influence on analysis results. Most work done in this area has adopted isotropic assignment strategy as its simplicity. However, bone material is widely recognized as being anisotropic rather than isotropic. Therefore, this work is aimed to simulate the inhomogeneity and anisotropy of femur by assigning each element of the mesh model the material properties with a numerical integration method and properly defining the principal material orientation, and then compare the biomechanical analysis results of isotropic model with that of anisotropic model under six different loading conditions. Based on the analysis results of the equivalent Von Mises stress and the nodal displacement, four different regions of interest are chosen to achieve this comparison. The results show that significant differences between the two material property assignments exist in the regions where anisotropic material property is sensitive to orientation definition. Thus, orientation definition is important to finite element simulation of bone material properties.

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