Finite-element Analysis of Load-bearing Hip Implant Design for Additive Manufacturing

2022 ◽  
Author(s):  
Yue Kai Cheah ◽  
Abdul Hadi Azman ◽  
Mohd Yazid Bajuri
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Additive Manufacturing ◽  
Implant Design ◽  
Design For Additive Manufacturing ◽  
Element Analysis ◽  
Load Bearing ◽  
Hip Implant

Experimental and Simulation Study of Ultrasonic Additive Manufacturing of CFRP/Ti Stacks

2018 ◽  
Author(s):  
Sagil James ◽  
Abhishek Sonate ◽  
Christopher Dang ◽  
Lenny De La Luz
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Additive Manufacturing ◽  
Dissimilar Materials ◽  
High Strength ◽  
Ultrasonic Welding ◽  
Industrial Applications ◽  
Element Analysis ◽  
Load Bearing ◽  
Ultrasonic Additive Manufacturing

Carbon fiber reinforced plastic (CFRP) are advanced engineering materials which are recognized as the most sought-after composite for several industrial applications including aerospace and automotive sectors. CFRP have superior physical and mechanical properties such as lightweight, high resilience, high-durability and high strength-to-weight ratio. CFRP composites stacked up with titanium to form multi-layered material stacks to enhance its load bearing capability. Traditional methods of stacking up CFRP and titanium involves using either high strength adhesives or rivets and bolts. The laminate structures joined by these methods often tend to fail during high load-bearing applications. Conventional metal welding technologies use high heat causing high thermal stresses and microstructural damages. Ultrasonic welding is a solid-state joining process, which has the capability of welding dissimilar materials at relatively low temperatures using ultrasonic vibration. Ultrasonic additive manufacturing (UAM) process is an ideal method to weld CFRP and Titanium. During the ultrasonic welding process, two dissimilar materials under a continuous static load are subjected to transverse ultrasonic vibrations, which results in high stress and friction between the two surfaces. This research focuses on the study of ultrasonically welding CFRP and Titanium stacks using UAM process. The study involves experimentation performed on an in-house built UAM setup. Finite element analysis is performed to understand the distribution stresses and strains during the UAM process. In this study, CFRP and Titanium layers are successfully welded using UAM process without causing any melting or significant heating. The finite element analysis study revealed that during UAM process, CFRP/Titanium stacks are subject to repeated cyclic shear stress reversals resulting in a strong weld joint. The stress-strain diagram during the process showed a considerable increase in plastic strain during the UAM process. The outcomes of this study can be used to further the industrial applications of the ultrasonic additive process as well as other ultrasonic welding based processes involving dissimilar materials.

scholarly journals New Dental Implant with 3D Shock Absorbers and Tooth-Like Mobility—Prototype Development, Finite Element Analysis (FEA), and Mechanical Testing

Materials ◽  
2019 ◽  
Vol 12 (20) ◽  
pp. 3444
Author(s):  
Avram Manea ◽  
Grigore Baciut ◽  
Mihaela Baciut ◽  
Dumitru Pop ◽  
Dan Sorin Comsa ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Mechanical Testing ◽  
Alveolar Bone ◽  
Mechanical Performance ◽  
Implant Design ◽  
Element Analysis ◽  
Prototype Development ◽  
Second Stage ◽  
Testing Protocol

Background: Once inserted and osseointegrated, dental implants become ankylosed, which makes them immobile with respect to the alveolar bone. The present paper describes the development of a new and original implant design which replicates the 3D physiological mobility of natural teeth. The first phase of the test followed the resistance of the implant to mechanical stress as well as the behavior of the surrounding bone. Modifications to the design were made after the first set of results. In the second stage, mechanical tests in conjunction with finite element analysis were performed to test the improved implant design. Methods: In order to test the new concept, 6 titanium alloy (Ti6Al4V) implants were produced (milling). The implants were fitted into the dynamic testing device. The initial mobility was measured for each implant as well as their mobility after several test cycles. In the second stage, 10 implants with the modified design were produced. The testing protocol included mechanical testing and finite element analysis. Results: The initial testing protocol was applied almost entirely successfully. Premature fracturing of some implants and fitting blocks occurred and the testing protocol was readjusted. The issues in the initial test helped design the final testing protocol and the new implants with improved mechanical performance. Conclusion: The new prototype proved the efficiency of the concept. The initial tests pointed out the need for design improvement and the following tests validated the concept.

Finite Element Analysis as an Aid to Implant Design

1979 ◽  
Vol 7 (1) ◽  
pp. 169-175 ◽  
Author(s):  
A. M. Weinstein ◽  
J. J. Klawitter ◽  
S. D. Cook
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Implant Design ◽  
Element Analysis
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