The selection of best material pair in the hip prosthetics design for improved performance and life relies on the estimation of hip joint contact stresses and contact pressure distribution during various dynamic loading cycles: Climbing Upstairs, Climbing downstairs and Knee bending. The maximum Von Mises stress, contact pressure and deformation are considered factors in selecting the material pair in this current study. This is done by analysis of a three-dimensional finite element model of the acetabular component during the different dynamics cycles using ANSYS®. The different material combination of bearing couples considered for this analysis are metal in contact with plastic, metal on metal, metal on ceramic, ceramic on plastic, ceramic on metal and ceramic on ceramic. The numerical results were validated by comparing them with the FEA results of Hai-Bo Jiang et al. for the existing material combinations and a high correlation of 92% was observed. We found that the Alumina femoral head paired with ultra-high molecular weight polyethylene (UHMWPE) cup reduces the maximum Von Mises stress and maximum contact pressure developed at the interface amongst other material pairs.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.3233/BME-181019 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Reactivity of Wet scCO toward Reservoir and Caprock Formations under Elevated Pressure and Temperature Conditions: Implications for CCS and CO-Based Geothermal Energy Extraction.
Energy Fuels
January 2025
Geothermal Energy and Geofluids Group, Institute of Geophysics, Department of Earth and Planetary Sciences, ETH Zurich, Zurich 8092, Switzerland.
Carbon capture and storage (CCS) and CO-based geothermal energy are promising technologies for reducing CO emissions and mitigating climate change. Safe implementation of these technologies requires an understanding of how CO interacts with fluids and rocks at depth, particularly under elevated pressure and temperature. While CO-bearing aqueous solutions in geological reservoirs have been extensively studied, the chemical behavior of water-bearing supercritical CO remains largely overlooked by academics and practitioners alike.
View Article and Find Full Text PDFExperiences of south Asian key workers in COVID-19 lockdowns in the United Kingdom.
J Migr Health
January 2025
Bielefeld University, Germany.
Background: This study aims to explore the experiences, challenges, and support given to South Asian Key Workers (food and necessary goods, Transport (delivery and taxi drivers,) working in the United Kingdom in times of the COVID-19 lockdowns between March 2020 to March 2021. The qualitative study aims to explore the experiences, challenges, and financial support given to South Asian Key Workers working in the United Kingdom in times of the COVID-19 lockdowns.
Methods: A phenomenological approach was used to explore the experiences of key workers during the COVID-19 lockdowns in the UK.
An open channel exposed core microstructured fiber is designed and fabricated for pressure and refractive index sensing. The core is on a flat platform surrounded by the cladding on which there is an open gap that allows the surrounding medium to contact the core. Due to the specially designed microstructure, the external pressure compresses the fiber core and causes changes of birefringence because of the photo-elastic effect.
View Article and Find Full Text PDFExperimental study and model prediction of the influence of different factors on the mechanical properties of saline clay.
Sci Rep
January 2025
College of Hydraulic and Civil Engineering, Xinjiang Agricultural University, 311 East Nongda Rd, Urumqi, 830052, China.
Water conveyance channels in cold and arid regions pass through several saline-alkali soil areas. Canal water leakage exacerbates the salt expansion traits of such soil, damaging canal slope lining structures. To investigate the mechanical properties of saline clay, this study conducted indoor tests, including direct shear, compression, and permeation tests, and scanning electron microscopy (SEM) analysis of soil samples from typical sites.
View Article and Find Full Text PDFInsulator-metal transition in VO film on sapphire studied by broadband dielectric spectroscopy.
Sci Rep
January 2025
Prokhorov General Physics Institute of the Russian Academy of Sciences, Moscow, 119991, Russia.
Vanadium dioxide ([Formula: see text]) is a favorable material platform of modern optoelectronics, since it manifests the reversible temperature-induced insulator-metal transition (IMT) with an abrupt and rapid changes in the conductivity and optical properties. It makes possible applications of such a phase-change material in the ultra-fast optoelectronics and terahertz (THz) technology. Despite the considerable interest to this material, data on its broadband electrodynamic response in different states are still missing in the literature.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!