Finite Element Analysis and Sizing Optimization of an Advanced Design Concept for a Composite Sail Structure

Stress shielding is a well-known failure factor in hip implants. This work proposes a design concept for hip implants, using a combination of metallic stem with a polymer coating (polyether ether ketone (PEEK)). The proposed design concept is simulated using titanium alloy stems and PEEK coatings with thicknesses varying from 100 to 400 μm. The Finite Element analysis of the cancellous bone surrounding the implant shows promising results. The effective von Mises stress increases between 81 and 92% for the complete volume of cancellous bone. When focusing on the proximal zone of the implant, the increased stress transmission to the cancellous bone reaches between 47 and 60%. This increment in load transferred to the bone can influence mineral bone loss due to stress shielding, minimizing such effect, and thus prolonging implant lifespan.

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A Development Study of a New Bi-directional Solenoid Actuator for Active Locomotion Capsule Robots

Electronics ◽

10.3390/electronics9050736 ◽

2020 ◽

Vol 9 (5) ◽

pp. 736

Author(s):

Linlin Wu ◽

Kaiyuan Lu

Keyword(s):

Finite Element Analysis ◽

Finite Element ◽

Permanent Magnets ◽

Design Concept ◽

Iron Core ◽

Element Analysis ◽

Development Study ◽

Solenoid Actuator ◽

Collision Force ◽

Active Locomotion

A new bi-directional, simple-structured solenoid actuator for active locomotion capsule robots (CRs) is investigated in this paper. This active actuator consists of two permanent magnets (PMs) attached to the two ends of the capsule body and a vibration inner mass formed by a solenoidal coil with an iron core. The proposed CR, designed as a sealed structure without external legs, wheels, or caterpillars, can achieve both forward and backward motions driven by the internal collision force. This new design concept has been successfully confirmed on a capsule prototype. The measured displacements show that its movement can be easily controlled by changing the supplied current amplitude and frequency of the solenoid actuator. To validate the new bi-directional CR prototype, various experimental as well as finite element analysis results are presented in this paper.

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Development of Universal Wheelchair Transporter

International Journal of Engineering & Technology ◽

10.14419/ijet.v7i4.27.22481 ◽

2018 ◽

Vol 7 (4.27) ◽

pp. 63

Author(s):

N. F.A Zulkepli. ◽

S. Khusairi ◽

M. S.B Shaari ◽

N. S Khusaini ◽

N. N Aziz. ◽

...

Keyword(s):

Finite Element Analysis ◽

Finite Element ◽

Product Design ◽

Selection Method ◽

Design Concept ◽

3D Design ◽

Element Analysis

This work introduces a new universal wheelchair transporter to transport a conventional wheelchair from one point to another. The chosen design concept had been selected using Pugh chart selection method [13], considering all aspect contributed that give the highest weightage. The 3D design utilized CATIA software to visualize the product. Mecanum wheels were chosen to move the platform due to its flexibility and maneuverability in any direction without turning the universal transporter. The objective of this project is to develop a fully functional universal wheelchair transporter to transport a patient from one room to another room in the hospital. The performance of the product design is then tested using Finite Element Analysis and shows good results.

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