Biomechanical Design of a Novel Six DOF Compliant Prosthetic Ankle-Foot 2.0 for Rehabilitation of Amputee

2017 ◽  
Author(s):  
Tan Thang Nguyen ◽  
Thanh-Phong Dao ◽  
Shyh-Chour Huang
Keyword(s):  
Strain Energy ◽  
Differential Evolution Algorithm ◽  
Maximum Energy ◽  
Element Analysis ◽  
Glass Fiber Reinforced Plastic ◽  
Glass Fiber Reinforced ◽  
Reinforced Plastic ◽  
The Finite Element Analysis ◽  
Six Dof ◽  
Deformation Stress

This paper develops a new design of a compliant prosthetic ankle-foot 2.0. The ankle-foot is a composite made of glass-fiber reinforced plastic (GFRP). The finite element analysis is used to evaluate the structural behavior of the ankle-foot, including the deformation, stress and strain energy. The Taguchi method is used to build a special orthogonal array. By using a differential evolution algorithm, the geometric parameters of the ankle-foot are determined. The result indicated that the optimal strain energy is improved approximately 155%. The maximum energy strain of 93.914 mJ is recognized. The results also revealed that the prosthetic ankle-foot is becoming more flexible due to the compliant ankle. Lastly, the prosthetic ankle-foot was proved to be effective for a human body up to 100 kg.

Finite Element Analysis of Glass Fiber Reinforced Plastic Hyperbolic Natural Draft Cooling Tower

2013 ◽  
Vol 365-366 ◽  
pp. 237-240
Author(s):  
Yun Long Li ◽  
Chun Ling Meng ◽  
Nian Peng Wu ◽  
Wen Hua Zhang
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Glass Fiber ◽  
Cooling Tower ◽  
Element Analysis ◽  
Glass Fiber Reinforced Plastic ◽  
Natural Draft ◽  
Fiber Reinforced Plastic ◽  
Glass Fiber Reinforced ◽  
Reinforced Plastic

Applicating the finite element analysis software Ansys to do finite element analysis of a glass fiber reinforced plastic hyperbolic natural draft cooling tower .Under the working condition of gravity and wind load, to contrast the two models of the presence or absence of abdominal rod displacement, stress and unit axial force, and check the stability of compressive bar, and structural optimization. Analysis results can provide reference for the structural design of hyperbolic cooling tower.

Bearing strength of interference-fit pin joined glass fiber reinforced plastic composites

2016 ◽  
Vol 54 (12) ◽  
pp. 1579-1591 ◽  
Author(s):  
Sang-Young Kim ◽  
Bin He ◽  
Dave (Dae-Wook) Kim ◽  
Chun Sik Shim ◽  
Ha Cheol Song
Keyword(s):  
Glass Fiber ◽  
Weight Ratio ◽  
Fiber Reinforced ◽  
Static Properties ◽  
Element Analysis ◽  
Interference Fit ◽  
Glass Fiber Reinforced Plastic ◽  
Fiber Reinforced Plastic ◽  
Glass Fiber Reinforced ◽  
Reinforced Plastic

Glass fiber reinforced plastic structures are mostly used in mid-sized marine vessels due to high strength and stiffness to weight ratio, corrosion resistance, and total life cost reductions. Mechanical joints using metallic bolts, screws, and pins are commonly used for joining thick glass fiber reinforced plastic laminates. Interference-fit pin connections provide beneficial effects such as fatigue enhancement and/or prevention of moisture intrusion to the fiber reinforced composites. This numerical and experimental study aims to investigate the effect of interference-fit on the bearing stiffness and strength of pin joined glass fiber reinforced plastic. The stress and strain distributions have been investigated for bearing loading through experiments as well as a nonlinear three dimensional finite element analysis. The quasi-static properties of the pin-loaded composites with interference-fit (0.6% and 1%) are compared with the samples with transition-fit (0% of interference-fit). The radial and the tangential strains on the vicinity of the hole obtained from the FE simulation were verified with the experimental results. The radial strains on the interference-fit pin joined glass fiber reinforced plastic coupons are lower than those on the transition-fit pin joined glass fiber reinforced plastic coupons at the consistent pin displacement, resulting in enhancement of the joint stiffness per unit bearing area by interference-fit.

FEA of Composite Leaf Spring for Light Commercial Vehicle: Technical Note

2020 ◽  
Vol 12 (4) ◽  
Author(s):  
M. Fakkir Mohamed ◽  
S. Yaknesh ◽  
G. Radhakrishnan ◽  
P. Mohan Kumar
Keyword(s):  
Glass Fiber ◽  
Strain Energy ◽  
Technical Note ◽  
Ride Quality ◽  
Leaf Spring ◽  
Element Analysis ◽  
Glass Fiber Reinforced Plastic ◽  
Glass Fiber Reinforced ◽  
Light Commercial Vehicle ◽  
Reduce Emissions

The intent of automotive sector for 21st century is to save fuel and reduce emissions. Due to this, the automotive designers are revisiting automotive systems and its parts for reducing the mass of the vehicles. For a suspension system, leaf spring is one of the key targets for weight reduction because it adds to unsprung mass which affects the ride quality of the vehicle. In this present study, a novel material such as a glass fiber reinforced plastic (GFRP) was selected. The polyester resin was used for conducting the numerical analysis via finite element analysis technique using ANSYS R15.0 software. Stresses, deformation and strain energy results for both steel and composite leaf spring material were obtained. Result shows that, the composite spring has a maximum strain energy than the steel leaf spring. The design constraints were stresses, deformations and strain energy. Compared to the steel spring, the composite spring (S-glass fiber) resulted in higher deformation, strain energy and stress.

The Importance of Material Structure in the Laser Cutting of Glass Fiber Reinforced Plastic Composites

1995 ◽  
Vol 117 (1) ◽  
pp. 133-138 ◽  
Author(s):  
G. Caprino ◽  
V. Tagliaferri ◽  
L. Covelli
Keyword(s):  
Experimental Data ◽  
Glass Fiber ◽  
Laser Cutting ◽  
Material Structure ◽  
Fiber Reinforced ◽  
Fiber Volume ◽  
Glass Fiber Reinforced Plastic ◽  
Fiber Reinforced Plastic ◽  
Glass Fiber Reinforced ◽  
Reinforced Plastic

A previously proposed micromechanical formula, aiming to predict the vaporization energy Qv of composite materials as a function of fiber and matrix properties and fiber volume ratio, was assessed. The experimental data, obtained on glass fiber reinforced plastic panels with different fiber contents cut by a medium power CO2 cw laser, were treated according to a procedure previously suggested, in order to evaluate Qv. An excellent agreement was found between experimental and theoretical Qv values. Theory was then used to predict the response to laser cutting of a composite material with a fiber content varying along the thickness. The theoretical predictions indicated that, in this case, the interpretation of the experimental results may be misleading, bringing to errors in the evaluation of the material thermal properties, or in the prediction of the kerf depth. Some experimental data were obtained, confirming the theoretical findings.

Sign in / Sign up

Export Citation Format

Share Document