Finite element analysis and cellular studies on advanced, controlled porous structures with subsurface continuity in bio-implantable titanium alloys

2013 ◽  
Vol 102 (1) ◽  
pp. 225-233 ◽  
Author(s):  
P. Lambert ◽  
S. Ankem ◽  
Z. Wyatt ◽  
K. M. Ferlin ◽  
J. Fisher
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Titanium Alloys ◽  
Porous Structures ◽  
Element Analysis ◽  
Implantable Titanium

STUDY OF HOLLOW STEMMED HIP BONE FORMING

2017 ◽  
Vol 41 (4) ◽  
pp. 531-542 ◽  
Author(s):  
Dyi-Cheng Chen ◽  
Jheng-Guang Lin
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Titanium Alloys ◽  
Effective Stress ◽  
Experimental Results ◽  
Analysis Software ◽  
Element Analysis ◽  
3D Finite Element ◽  
Friction Factors ◽  
Punch Load

This study investigated hollow stemmed hip forging for enhancing the biocompatibility of Ti-6AL-4V titanium alloys. Instead of using the expensive titanium billet, this study applied DEFORMTM 3D finite element analysis software to simulate and analyze stem forming with respect to different die temperatures, friction factors, punch types, forging velocities, and billet temperatures. On the basis of its shape, a punch can be classified as flat head, ladder shaped, spherical, and conical. These differences affect the effective stress and punch load after stem formation. The experiment parameters were determined using the Taguchi L16 (45) orthogonal table. Both the simulated and experimental results indicated that the error for the size of the bone stem was less than 2%.

scholarly journals Finite element analysis of Ti6Al4V porous structures for low-stiff hip implant application

2021 ◽  
Vol 12 ◽  
pp. 12
Author(s):  
Porika Rakesh ◽  
Bidyut Pal
Keyword(s):  
Mechanical Properties ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Hip Implants ◽  
Porous Structures ◽  
Element Analysis ◽  
Hip Implant ◽  
Femur Bone ◽  
Body Center Cubic ◽  
Effective Mechanical Properties

Solid metallic hip implants have much higher stiffness than the femur bone, causing stress-shielding and subsequent implant loosening. The development of low-stiff implants using metallic porous structures has been reported in the literature. Ti6Al4V alloy is a commonly used biomaterial for hip implants. In this work, Body-Center-Cubic (BCC), Cubic, and Spherical porous structures of four different porosities (82%, 76%, 70%, and 67%) were investigated to establish the range of ideal porosities of Ti6Al4V porous structures that can match the stiffness of the femur bone. The effective mechanical properties have been determined through Finite Element Analysis (FEA) under uniaxial compressive displacement of 0.32 mm. FEA predictions were validated with the analytical calculations obtained using Gibson and Ashby method. The effective mechanical properties of 82%, 76%, 70%, and 67% porous BCC and Cubic structures were found to match the mechanical properties of cortical bone closely. They were also well comparable to the Gibson-Ashby method-based calculations. BCC and Cubic porous structures with 67–82% porosity can mimic the stiffness of the femur bone and are suitable for low-stiff hip implant applications.

scholarly journals Comparison of CAD and Voxel-Based Modelling Methodologies for the Mechanical Simulation of Extrusion-Based 3D Printed Scaffolds

Materials ◽  
2021 ◽  
Vol 14 (19) ◽  
pp. 5670
Author(s):  
Gisela Vega ◽  
Rubén Paz ◽  
Andrew Gleadall ◽  
Mario Monzón ◽  
María Elena Alemán-Domínguez
Keyword(s):  
Tissue Engineering ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Mechanical Behaviour ◽  
Dimensional Accuracy ◽  
Process Efficiency ◽  
Complex Geometries ◽  
Porous Structures ◽  
Element Analysis ◽  
3D Printed

Porous structures are of great importance in tissue engineering. Most scaffolds are 3D printed, but there is no single methodology to model these printed parts and to apply finite element analysis to estimate their mechanical behaviour. In this work, voxel-based and geometry-based modelling methodologies are defined and compared in terms of computational efficiency, dimensional accuracy, and mechanical behaviour prediction of printed parts. After comparing the volumes and dimensions of the models with the theoretical and experimental ones, they are more similar to the theoretical values because they do not take into account dimensional variations due to the printing temperature. This also affects the prediction of the mechanical behaviour, which is not accurate compared to reality, but it makes it possible to determine which geometry is stiffer. In terms of comparison of modelling methodologies, based on process efficiency, geometry-based modelling performs better for simple or larger parts, while voxel-based modelling is more advantageous for small and complex geometries.

scholarly journals A validated finite element analysis procedure for porous structures

2020 ◽  
Vol 189 ◽  
pp. 108546 ◽  
Author(s):  
Sergio Ruiz de Galarreta ◽  
Jonathan R.T. Jeffers ◽  
Shaaz Ghouse
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Analysis Procedure ◽  
Porous Structures ◽  
Element Analysis

Dynamic analysis of functionally graded porous structures through finite element analysis

2018 ◽  
Vol 165 ◽  
pp. 287-301 ◽  
Author(s):  
Di Wu ◽  
Airong Liu ◽  
Youqin Huang ◽  
Yonghui Huang ◽  
Yonglin Pi ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Dynamic Analysis ◽  
Functionally Graded ◽  
Porous Structures ◽  
Element Analysis

Evaluation of mechanical properties of Ti-25Nb BCC porous cell structure and their association with structure porosity: A combined finite element analysis and analytical approach for orthopedic application

2021 ◽  
pp. 095441192110113
Author(s):  
Soham Chowdhury ◽  
Amit Anand ◽  
Adhish Singh ◽  
Bidyut Pal
Keyword(s):  
Mechanical Properties ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Mechanical Performance ◽  
Bone Ingrowth ◽  
Structural Parameters ◽  
Cell Structure ◽  
Porous Structures ◽  
Element Analysis ◽  
Functional Relationships

Ti-based alloys have been commonly employed in manufacturing implants for orthopedic applications. Binary Titanium-Niobium (Ti-25Nb) alloy is a promising material for potential applications in orthopedics because of their lower elastic moduli and superior biocompatibility than the conventional Ti-based alloys. Implants with porous structures encourage bone ingrowth and reduce the effect of stress-shielding further. This study is aimed at establishing the relationship between the mechanical performance and structural parameters of porous body-centered-cubic (BCC) structures made up of Ti-25Nb (25% by wt.). Solid models of BCC porous structures were constructed (unit cell size: 2 mm; overall size: 8 × 8 × 8 mm3). Finite element analysis (FEA) of the BCC structures with porosity ranging from 29% to 79% (seven porosities) was conducted under tension, bending, and torsional loads. The Gibson-Ashby model and Exponential regression model were also employed to determine the stiffness of the above porous structures. The functional relationships between effective Young’s modulus, effective yield strength, and porosity generated from both the models were found to match the FEA results well. Results indicated that porosity in the range of 50%−70% can be used to design graded porous stems to mimic the mechanical properties of cortical bone.

Sign in / Sign up

Export Citation Format

Share Document