Assessment of Shoulder and Chest Protection of Wearable Motorcycle Airbags

2019 ◽  
Author(s):  
Davide Girardi ◽  
Edoardo Marconi ◽  
Matteo Massaro
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Impact Test ◽  
Material Model ◽  
Element Model ◽  
Inflation Pressure ◽  
Human Body Model ◽  
Physics Simulation ◽  
Set Up ◽  
The Finite Element Model

Abstract The application of numerical simulation to wearable airbags for motorcyclists is relatively recent and only few works about this topic can be found in the literature. This research uses multi-physics simulation to analyse a new wearable airbag geometry, primarily designed to protect the shoulders of motorcycle riders, with the aim of assessing the effect of inflation pressure on the protection performance. The finite element model of the airbag employs a simple linear-isotropic material model, calibrated though the comparison between experimental and numerical outcomes of a drop test, together with the analysis of the airbag inflated geometry. The finite element model of the wearable device is then fitted to a dummy model and a human body model, in order to be used in a parametric analysis. Two set-ups are considered. The first is a thorax impact test, used to assess the effect of inflation pressure on chest protection. A modification to the bag geometry is also proposed and tested on this configuration. The second set-up is a shoulder impact test, used to assess the effect of inflation pressure on shoulder protection. In both tests an optimal inflation pressure can be found, but the maximization of shoulder protection proved more critical and should therefore drive the choice of this parameter.

Numerical Investigation of Flexible Clamp Multi-Point Stretch Forming

2014 ◽  
Vol 602-605 ◽  
pp. 102-105 ◽  
Author(s):  
He Li Peng ◽  
Zhong Quan Li ◽  
Qun Lin Cheng ◽  
Yong Yuan ◽  
Ming Zhe Li
Keyword(s):  
Finite Element ◽  
Error Analysis ◽  
Finite Element Model ◽  
Element Model ◽  
Forming Limit ◽  
Stretch Forming ◽  
Forming Quality ◽  
Spherical Part ◽  
Set Up ◽  
The Finite Element Model

The finite element model of flexible clamp multi-point stretch forming (FCMPSF) was set up, and extensive contradistinctive analysis of forming limit and forming accuracy between FCMPSF and RCMPSF were done. The results show that under the same forming conditions, spherical part formed by FCMPSF is not easy to fracturing, dimpling and springback, and is easy to fit the die. The reason for this was analysed. The non-fracturing limited graph, the non-dimpling limited diagram and the average springback value of spherical parts formed by FCMPSF and RCMPSF were obtained. Finally, the forming experiment and error analysis of spherical part formed by FCMPSF were done, the results indicate that 3D parts with large transversal curvature can be shaped by FCMPSF and the forming quality was guaranteed.

Research on Surface Overpressure and Deformation of Underground Frame Beam under Internal Blast Loads

2013 ◽  
Vol 790 ◽  
pp. 391-395
Author(s):  
Tian Li ◽  
Qiao Ying Jiang
Keyword(s):  
Numerical Simulation ◽  
Finite Element ◽  
Finite Element Model ◽  
Middle Surface ◽  
Element Model ◽  
Blast Loads ◽  
Numerical Result ◽  
Set Up ◽  
Short Time ◽  
The Finite Element Model

The finite element model of a separately built one-storey underground frame was set up with software ANSYS/LS-DYNA and numerical simulation was done to study on surface overpressure and deformation of the underground frame beam under internal blast loads. It is found that the overpressure peak values on the beam end and middle surface are both much higher when the explosive is below the middle of beam and the peak on the middle surface goes up with the increment of explosive height while that on the beam end surface is not sensitive to the height. The numerical result also indicates that the soil around the frame nearly has no effect on surface overpressure of the frame beam. However, whether there is soil or not the beam deformation has much difference and the increment of the deformation is closely all the same for different soil thicknesses but under the circumstance of thicker soil the beam obtains less deformation upward in a short time after explosion.

Finite Element Analysis of Head-Form Impacting Laminated Glass for Automotive Windscreens

2016 ◽  
Vol 680 ◽  
pp. 72-75
Author(s):  
Yan Min ◽  
Zeng Chen Cao ◽  
Shuang Li
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Finite Element Model ◽  
Mechanical Behavior ◽  
Element Model ◽  
Laminated Glass ◽  
Element Analysis ◽  
Head Form ◽  
Set Up ◽  
The Finite Element Model

Based on GB/T 5137.1-2002 experiment specification, the finite element model of head-form impacting laminated glass for automotive windscreens is set up in this paper. According to Finite Element Analysis results of laminated glass with different structure and further analyzing impact property and mechanism of laminated glass , the influence rule of the structure of the laminated glass on the mechanical behavior is discussed. (H)

Analysis of Elastic Deformation of Axial Foil Hydrodynamic Thrust Bearing Used in Turbine Generator

2011 ◽  
Vol 188 ◽  
pp. 199-202
Author(s):  
Yu Kui Wang ◽  
Z.Q. Zeng ◽  
Zhen Long Wang ◽  
Y.S. Huang
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Elastic Deformation ◽  
Thrust Bearing ◽  
Element Model ◽  
Lubricant Layer ◽  
Turbine Generator ◽  
Fea Model ◽  
Set Up ◽  
The Finite Element Model

In this paper, an elastic deformation of the axial foil hydrodynamic thrust bearing used in 100KW gas turbine generator is studied. The finite element model of the foil hydrodynamic thrust bearing was established using Solidworks and ANSYS. The foil hydrodynamic thrust bearing which considered foil deformation was analyzed and calculated based on the results of the approximate calculation. The FEA model considered the interaction of plane foil deformation and wave foil. The wave foil was not hypothesized as the linear distributed spring when set up the finite element model. The ANSYS results have demonstrated that the deformation of foil bearing designed based on the result of numerical calculation can meet the requirement of minimal film thickness of bearing lubricant layer.

Research on the Effects of the Generator with Differential Supporting Characteristics on Vibrations of the Three-Bearing Structure

2014 ◽  
Vol 955-959 ◽  
pp. 886-889
Author(s):  
Qing Meng Zeng ◽  
Zheng Feng Wu ◽  
Shan Shan Zhang ◽  
Qin Han ◽  
Jun He
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Harmonic Component ◽  
Element Model ◽  
Axial Position ◽  
Component Method ◽  
Set Up ◽  
Bearing Structure ◽  
The Finite Element Model

The finite element model of a 1000MW unit was set up and vibrations of the three-bearing structure were studied. The results show that the generator supporting characteristics have great effects on vibrations of the three-bearing structure. Many factors are needed to be considered when field balancing. The generator supporting characteristics should be considered when judging the type and axial position of imbalances. Repeated balancing are invalid and even the vibrations diverge if just following simply the harmonic component method to determine directly the imbalance types. The conclusion reliabilities were further verified with the tests.

Structural Optimization of Packer’ Cone with Material Properties and Mechanics Parameters Based on ANSYS

2012 ◽  
Vol 252 ◽  
pp. 172-175
Author(s):  
Zhi Ping Guo ◽  
Wei Guo ◽  
Yan Fei Wang ◽  
Guan Fu Li ◽  
Yan Zheng Lu
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Material Properties ◽  
Theoretical Basis ◽  
Cone Angle ◽  
Element Model ◽  
Mechanical Analysis ◽  
Calculation Results ◽  
Set Up ◽  
The Finite Element Model

Cone is one part of a packer. To understand the seal effectiveness of the packer, mechanical analysis must be made for it. The finite element model of packer is set up and packer minimum setting load changes are calculated under different climb angle of cone. Results show that reduce the cone angle of climb can make the packer sealing load significantly lower.The calculation results provide the theoretical basis for the real operation.

Study on Stability of the High Rock Slope under the Flood Discharge Atomization and Rainfall

2014 ◽  
Vol 620 ◽  
pp. 205-209 ◽  
Author(s):  
Zhen Zhong Shen ◽  
Bai Song Nie ◽  
Li Qun Xu ◽  
Lei Yang ◽  
Ning Wang
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Rock Slope ◽  
Element Model ◽  
Flood Discharge ◽  
Geological Conditions ◽  
High Rock Slope ◽  
Set Up ◽  
The Stability ◽  
The Finite Element Model

The stability of high rock slopes under the flood discharge atomization and rainfall is an in-negligible problem especially for the hydropower station with high head during the flood discharge. According to the complicated geological conditions of a high rock slope with the flood discharge problem in China, the method of the saturated-unsaturated unsteady seepage if used, thus the finite element model for the high rock slope in the downstream of the power station is set up. Based on the model, the distribution regularities of the unsteady seepage field of the rock slope is studied under the different discharge atomization and rainfall intensity. Moreover, based on the theory of continuous-discontinuous deformation, the finite element model is set up to analyze the stability of the slope, thus the deformation law of slopes under the flood discharge atomization and rainfall is studied and the safety of the slope is evaluated, and what's more, the engineering measures for improve the stability of the stability of the slope is put forward.

Dynamic Analysis of Cross Simulator

2011 ◽  
Vol 52-54 ◽  
pp. 1698-1702
Author(s):  
Xu Dong Yang ◽  
Liang Liang Jin ◽  
Jia Chun Li ◽  
Zhi Qiang Jin ◽  
Jin Zhao
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Dynamic Analysis ◽  
Static Analysis ◽  
Dynamic Characteristics ◽  
Impact Load ◽  
Element Model ◽  
Explicit Method ◽  
Set Up ◽  
The Finite Element Model

The finite element model of cross simulator including supporting structure, beam, etc. was set up in the environment of ABAQUS. After the static analysis which meets the requirements, the model’s dynamic characteristics when bearing impact load was obtained using explicit method according to modal analysis results. Comparing different analysis results with technical index, it indicates that larger impact load makes the dynamic characteristics worse significantly.

Numerical Simulation of Aluminum Alloy Wheel 13° Impact Test Based on Abaqus

2012 ◽  
Vol 215-216 ◽  
pp. 1191-1196 ◽  
Author(s):  
Xiao Ming Yuan ◽  
Li Jie Zhang ◽  
Xin Ying Chen ◽  
Bing Du ◽  
Bao Hua Li ◽  
...  
Keyword(s):  
Finite Element ◽  
Aluminum Alloy ◽  
Finite Element Model ◽  
Impact Test ◽  
Equivalent Plastic Strain ◽  
Element Model ◽  
Experimental Result ◽  
Alloy Wheel ◽  
The Impact ◽  
The Finite Element Model

In order to predict the result of impact test in the design phase and reduce the experimental times, which can save cost and shorten development cycle, a finite element model of aluminum alloy wheel 13-degree impact test is established based on Abaqus. All mechanical parts such as the standard impact block, the assembly of the wheel and the tire, the support and bolts are included in the finite element model. The predicted result of finite element analysis and the experimental result agree very well shows the finite element model is correct. The equivalent plastic strain value was also put forward as fracture criterion for the wheel in the impact test which realizes the transition from the qualitative analysis to the quantitative analysis in the development process of aluminum alloy wheel.

scholarly journals Development of a Computer Model for Prediction of Collision Response of a Railroad Passenger Car

Joint Rail ◽  
2002 ◽  
Author(s):  
Steven W. Kirkpatrick ◽  
Robert A. MacNeill
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Test Data ◽  
Computer Model ◽  
Impact Test ◽  
Three Dimensional ◽  
Element Model ◽  
Passenger Car ◽  
Collision Response ◽  
The Finite Element Model

The paper describes the development of a detailed finite element model that is capable of predicting the response of a rail passenger car to collision conditions. This model was developed to predict the car crush, the three-dimensional gross motions of the car, and the vertical, lateral, and longitudinal accelerations experienced by the car during collisions. The finite element model developed was for a Pioneer passenger coach car. This vehicle was used in a single car impact test. The model was then used to simulate the test and the results are compared to the test data.

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