scholarly journals Analysis of the porous bone-implant fixation – experimental verification of numerical model

2018 ◽  
Vol 157 ◽  
pp. 05002
Author(s):  
Maciej Berdychowski ◽  
Janusz Mielniczuk
Keyword(s):  
Numerical Simulation ◽  
Numerical Model ◽  
Cancellous Bone ◽  
Experimental Verification ◽  
Test Results ◽  
Implant Fixation ◽  
Bone Implant ◽  
New Type ◽  
Fixation System

In this paper a new type of endoprothesis THRA with needle-palisade fixation system has been described. A numerical model of such fixation has been created. The developed model was subjected to experimental verification. During the test, the prototype of the needle palisade structure was inserted into the cancellous bone. The test results were compared with numerical simulation.

scholarly journals Investigation on the transport properties of chlorides in concrete II Numerical simulation

2018 ◽  
Vol 199 ◽  
pp. 02014 ◽  
Author(s):  
TIAN Ye ◽  
JIN Xianyu ◽  
JIN Nanguo
Keyword(s):  
Numerical Simulation ◽  
Numerical Model ◽  
Chloride Ion ◽  
Chloride Ions ◽  
Transmission Model ◽  
Test Results ◽  
Surface Scanning ◽  
Parallel Transmission ◽  
Transmission Process ◽  
Chloride Ions Diffusion

The chloride ions diffusion in concrete is an important problem inducing the corrosion of reinforcement under marine environment. Based on a parallel transmission model, the diffusion coefficient of chloride ions in ITZ was determined. Thereafter, the measured parameters of ITZ were integrated into a numerical model to simulate the chloride ions diffusion and the reliability of the model was verified by comparing the numerical simulation with the surface scanning results collected from the electron microprobe. The test results show that if the concrete is taken as a threephase composites, the numerical model can reflect the real transmission process of chloride ion more accurately.

Numerical Simulation on Forming Behavior of Magnesium Alloy at Elevated Temperatures with Experimental Verification

2013 ◽  
Vol 677 ◽  
pp. 179-182
Author(s):  
L.C. Chan ◽  
X.Z. Lu
Keyword(s):  
Numerical Simulation ◽  
Magnesium Alloy ◽  
Experimental Test ◽  
Experimental Verification ◽  
Elevated Temperatures ◽  
Alloy Sheet ◽  
Forming Limit ◽  
Test Results ◽  
Az31b Alloy ◽  
Good Agreement

This study aimed to predict the formability of AZ31B alloy sheets at elevated temperatures by combining the experimental test with numerical simulation. Forming limit tests were performed to obtain the FLDs of the AZ31B alloy sheet at elevated temperatures of 250 °C and 300 °C. Numerical simulations of warm stamping for a camera case were established based on the forming test results. Furthermore, warm stamping experiments for the camera case were performed to validate the correction of the simulated results. The numerical results show a good agreement with the experimental observations.

Research on Hydrodynamic Performance of Front-Mounted Water Separation Propeller

2012 ◽  
Vol 166-169 ◽  
pp. 2976-2981
Author(s):  
Feng Feng ◽  
Xin Chang ◽  
Xiang Ru Cheng ◽  
Xiang Yang Qi
Keyword(s):  
Numerical Simulation ◽  
Hydrodynamic Performance ◽  
Test Results ◽  
Water Separation ◽  
Ship Model ◽  
Vof Model ◽  
Sst Turbulence Model ◽  
New Type ◽  
Simulation Results ◽  
Hybrid Grid

The Front-mounted Water Separation Propeller is a new-type energy saving propulsion device, on which it’s necessary to make research. A numerical simulation on the hydrodynamic performance of the Front-mounted Water Separation Propeller by RANS method was performed. The simple ship models with and without Front-mounted Water Separation Propeller were established and meshed by using hybrid grid. The drag performances of the ship model with and without Front-mounted Water Separation Propeller were performed separately by using Kω-SST turbulence model and VOF model. The method provided in this article is proved to be effective by make comparison between the simulation results and the model test results. The results show that the ship resistance can be reduced by using the Front-mounted Water Separation Propeller.

The Characteristics of MEMS Based Seismic Sensors Using the Electrochemical Approach

2013 ◽  
Vol 562-565 ◽  
pp. 486-489 ◽  
Author(s):  
Yun Jie Fan ◽  
Jun Bo Wang ◽  
Tao Deng ◽  
De Yong Chen ◽  
Wen Tao He
Keyword(s):  
Numerical Simulation ◽  
Numerical Model ◽  
Vibration Test ◽  
Test Results ◽  
Seismic Sensors ◽  
Electrochemical Approach ◽  
The Difference ◽  
Set Up

The characteristics of MEMS based electrochemical seismic sensors (EC seismic sensors) are presented in this paper. A numerical model is set up, and a series of vibration test is established. The numerical simulation and vibration test results are illustrated and the difference between them is discussed.

scholarly journals Blowing and drifting snow in Alpine terrain: numerical simulation and related field measurements

1998 ◽  
Vol 26 ◽  
pp. 174-178 ◽  
Author(s):  
Peter Gauer
Keyword(s):  
Numerical Simulation ◽  
Numerical Model ◽  
Three Dimensional ◽  
Field Measurements ◽  
Blowing Snow ◽  
Related Field ◽  
Drifting Snow ◽  
Physically Based ◽  
Snow Transport

A physically based numerical model of drifting and blowing snow in three-dimensional terrain is developed. The model includes snow transport by saltation and suspension. As an example, a numerical simulation for an Alpine ridge is presented and compared with field measurements.

scholarly journals Numerical and Experimental Study of Lightning Stroke to BIPV Modules

Energies ◽  
2021 ◽  
Vol 14 (3) ◽  
pp. 748
Author(s):  
Xiaoyan Bian ◽  
Yao Zhang ◽  
Qibin Zhou ◽  
Ting Cao ◽  
Bengang Wei
Keyword(s):  
Numerical Simulation ◽  
Experimental Study ◽  
Coupling Model ◽  
Maximum Temperature ◽  
Lightning Stroke ◽  
Study Results ◽  
Pv Modules ◽  
New Type ◽  
Metal Frame ◽  
Current Flows

Building Integrated Photovoltaic (BIPV) modules are a new type of photovoltaic (PV) modules that are widely used in distributed PV stations on the roof of buildings for power generation. Due to the high installation location, BIPV modules suffer from lightning hazard greatly. In order to evaluate the risk of lightning stroke and consequent damage to BIPV modules, the studies on the lightning attachment characteristics and the lightning energy withstand capability are conducted, respectively, based on numerical and experimental methods in this paper. In the study of lightning attachment characteristics, the numerical simulation results show that it is easier for the charges to concentrate on the upper edge of the BIPV metal frame. Therefore, the electric field strength at the upper edge is enhanced to emit upward leaders and attract the lightning downward leaders. The conclusion is verified through the long-gap discharge experiment in a high voltage lab. From the experimental study of multi-discharge in the lab, it is found that the lightning interception efficiency of the BIPV module is improved by 114% compared with the traditional PV modules. In the study of lightning energy withstand capability, a thermoelectric coupling model is established. With this model, the potential, current and temperature can be calculated in the multi-physical field numerical simulation. The results show that the maximum temperature of the metal frame increases by 16.07 °C when 100 kA lightning current flows through it and does not bring any damage to the PV modules. The numerical results have a good consistency with the experimental study results obtained from the 100 kA impulse current experiment in the lab.

Sublimation of composite ice and its influence on performance of ice shells

2021 ◽  
Vol 36 (1) ◽  
pp. 67-77
Author(s):  
Yue Wu ◽  
Junkai Huang ◽  
Jiafeng Chen
Keyword(s):  
Numerical Simulation ◽  
Shell Structure ◽  
Composite Shell ◽  
Engineering Practice ◽  
Sublimation Rate ◽  
Long Span ◽  
Static Performance ◽  
New Type ◽  
Ice Sublimation ◽  
Composite Shell Structure

The long-span ice composite shell structure is a new type of ice and snow structure developed in recent years. The engineering practice of ice composite shell shows that sublimation is one of the important reasons for its damage and even collapse. In this paper, we firstly supplemented the existing H-K equation and obtained the revised ice sublimation equation through indoor evaporative plate experiment considering the influence of admixtures and wind speed. Afterwards, combining the simulations of solar radiation and CFD, the numerical simulation of sublimation distribution on the surface of were realized by programming in Grasshopper platform. During sublimation, the thickness of the ice composite shell decreases by 0.38 mm every 10 days and the sublimation rate on the sunny side was 1.7 times that on the shady side. Finally, the static performance and stability of the sublimated ice composite spherical shell were analyzed. After 70 days of sublimation, the thickness of the ice composite shell structure becomes thinner and uneven, which leads its sensitivity to external load increases.

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