scholarly journals Experimental Study on the Impact Load of Hybrid III 50th Male Dummy in Elevator Car

2021 ◽  
Vol 2044 (1) ◽  
pp. 012181
Author(s):  
Xiaochang Liu ◽  
Facai Ren ◽  
Xiao Liang ◽  
Bo Wang
Keyword(s):  
Experimental Study ◽  
Impact Load ◽  
Hybrid Iii ◽  
The Impact

A Method for the Assessment of the Dynamic Performance of Neck Protection Devices

2013 ◽  
Author(s):  
Gianmarco Galmarini ◽  
Massimiliano Gobbi ◽  
Gianpiero Mastinu ◽  
Giorgio Previati
Keyword(s):  
Impact Load ◽  
Dynamic Performance ◽  
Head Injuries ◽  
Test Procedure ◽  
Neck Injury ◽  
Multibody Model ◽  
Hybrid Iii ◽  
Protection Devices ◽  
Male Hybrid ◽  
The Impact

In this paper a method for the evaluation of the dynamic performance of neck protection devices for motorcyclists is presented. The research project involves both experimental and numerical activities. An impulsive load is applied to the head of a 50th percentile male Hybrid III dummy while wearing a helmet by means of a pendulum of calibrated mass starting from a well-defined initial condition. The impact load and the load at the neck of the dummy are measured by means of two six axes load cells. Additionally, head linear and rotational accelerations are measured. The test procedure shows a very good repeatability and allows for the comparison of the force passing through the neck with and without neck protection devices. Since neck protection devices should work in situations in which no relevant head injuries are present, the experimental parameters (pendulum mass and speed) are chosen to cause a high probability of injuries to the neck together with a low probability of damages to the head while wearing a standard helmet. Injury indices, found in the literature, have been used to determine the neck injury level. A multibody model of the human neck, developed in Matlab™ SimMechanics™, is validated by using the data acquired during the tests. A study of real-world crashes has allowed the identification of reference impact scenarios which have been simulated by using the multibody model. The validated model is suitable to determine the chance that a motorcyclist would have significant neck injury with or without a neck protecting device.

Experimental study on the impact load of internally supported gelatin bird projectiles

2021 ◽  
Vol 124 ◽  
pp. 105336 ◽  
Author(s):  
Gang Luo ◽  
Ziming Xu ◽  
Haitao Shen ◽  
Wei Chen ◽  
Haiyang Zhang
Keyword(s):  
Experimental Study ◽  
Impact Load ◽  
The Impact

Experimental Study on Shock Absorption Effect of Mechanical Device Utilizing Wedge and Rubber

2011 ◽  
Vol 82 ◽  
pp. 589-593
Author(s):  
Kazuyoshi Ishibashi ◽  
Satoshi Katsuki ◽  
Akinori Hirose ◽  
Kenji Tanaka
Keyword(s):  
Experimental Study ◽  
Impact Loading ◽  
Impact Load ◽  
Test Results ◽  
Mechanical Device ◽  
Loading Test ◽  
Absorption Effect ◽  
Static Loading Test ◽  
The Impact ◽  
Impact Absorption

This paper presents an experimental study on the impact absorption effect of the device which utilizes both shear deformation ductility of rubbers and a wedge mechanical system. Two types of experiments, i.e., static and impact loading, are carried out. Rate effect on resistance of the device is checked by comparison between static loading test results. The impact absorption effect is discussed by comparisons of the impact loading test between the impact load and the transmitting load. The other some impact absorption effects are discussed on the impact loading test.

Experimental Study on Impact Resistance of CaCO3 Whisker-Reinforced Cement Mortar

2011 ◽  
Vol 99-100 ◽  
pp. 706-710
Author(s):  
Ming Li Cao ◽  
Hang Yao ◽  
Shi Cai Cui
Keyword(s):  
Experimental Study ◽  
Failure Modes ◽  
Cement Mortar ◽  
Impact Load ◽  
Impact Resistance ◽  
Reinforcing Effect ◽  
Reinforced Cement ◽  
The Impact

CaCO3 whiskers were incorporated into the cement mortar in this study and the effects of whiskers on the impact resistance of mortar were investigated. The results showed that CaCO3 whiskers could improve the impact resistance of cement mortar before initial cracking. When the whisker content was 10%, the reinforcing effect was optimal. But after initial cracking, the capacity of matrix to resist further impact load was not improved significantly. By observing the failure modes of specimens, it was shown that the crack branches of whisker-reinforced cement mortar were increased, which indicated the brittleness of matrix was decreased and the toughness was improved to some extent. In addition, the reinforcing mechanisms of CaCO3 whiskers in the cement mortar were also discussed

scholarly journals An experimental study of composite effect on the behaviour of beam-column joints subjected to impact load

2018 ◽  
Author(s):  
Kang Hai Tan ◽  
Kang Chen
Keyword(s):  
Experimental Study ◽  
Impact Load ◽  
Testing Machine ◽  
Experimental Studies ◽  
Composite Effect ◽  
Composite Slab ◽  
Composite Joint ◽  
Adjacent Structures ◽  
The Impact ◽  
Middle Column

This paper presents an experimental study on structural behaviour of composite beam-column joints under a middle column removal scenario. Specimens were subjected to impact loads from an MTS drop-weight testing machine. Two joints with welded unreinforced beam flange and bolted web connections were designed per AISC 360-10. One of the beam-column joints had a thicker composite slab. The joints were restrained by pinned supports at two beam ends, which were connected to rigid A-frames to represent boundary conditions from adjacent structures. Test results indicated that the composite slab significantly affected the impact force due to an increase of inertia. However, other structural responses (especially displacement of the middle column) decreased due to increase of stiffness contributed by the thicker composite slab. The finding was that increasing thickness of composite slab can increase the resistance of composite joint significantly due to increased composite effect. More experimental studies were conducted to investigate other types of joints.

Experimental study of thermohydraulic characteristics and irreversibility analysis of novel axial corrugated tube with spring tape inserts

2020 ◽  
Vol 92 (3) ◽  
pp. 30901
Author(s):  
Suvanjan Bhattacharyya ◽  
Debraj Sarkar ◽  
Ulavathi Shettar Mahabaleshwar ◽  
Manoj K. Soni ◽  
M. Mohanraj
Keyword(s):  
Heat Transfer ◽  
Experimental Study ◽  
Thermal Performance ◽  
Working Fluid ◽  
The Novel ◽  
Heat Exchanger Tube ◽  
Heat Transfer Augmentation ◽  
Corrugated Tube ◽  
The Impact ◽  
Exchanger Tube

The current study experimentally investigates the heat transfer augmentation on the novel axial corrugated heat exchanger tube in which the spring tape is introduced. Air (Pr = 0.707) is used as a working fluid. In order to augment the thermohydraulic performance, a corrugated tube with inserts is offered. The experimental study is further extended by varying the important parameters like spring ratio (y = 1.5, 2.0, 2.5) and Reynolds number (Re = 10 000–52 000). The angular pitch between the two neighboring corrugations and the angle of the corrugation is kept constant through the experiments at β = 1200 and α = 600 respectively, while two different corrugations heights (h) are analyzed. While increasing the corrugation height and decreasing the spring ratio, the impact of the swirling effect improves the thermal performance of the system. The maximum thermal performance is obtained when the corrugation height is h = 0.2 and spring ratio y = 1.5. Eventually, correlations for predicting friction factor (f) and Nusselt number (Nu) are developed.

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