The Design of a Pendulum Impact Test Device for Airbag Performance

2011 ◽  
Vol 332-334 ◽  
pp. 1188-1192 ◽  
Author(s):  
Ge Chen ◽  
Jia Lu Li
Keyword(s):  
Impact Test ◽  
High Reliability ◽  
Low Cost ◽  
Gas Generator ◽  
Test Device ◽  
Impact Device ◽  
Set Up ◽  
The Impact ◽  
Important Basis ◽  
Pendulum Impact

A low cost, high reliability pendulum impact device is designed and set up with a gas generator and inflator, and a real deploy test is conducted with 45L drive airbags made of Nylon 66. The interaction between the dummy pendulum and the airbag in this simulation is recorded to observe and study the impact and injury to human body. The HIC is calculated and taken as an important basis for the evaluation of airbag performance. This test can also be used on the study and optimization of airbag fabrics.

scholarly journals Investigation on the Application of Taylor Impact Test to High-G Loading

2021 ◽  
Vol 8 ◽  
Author(s):  
Li Juncheng ◽  
Chen Gang ◽  
Lu Yonggang ◽  
Huang Fenglei
Keyword(s):  
Pulse Duration ◽  
Impact Loading ◽  
Impact Test ◽  
Impact Load ◽  
Low Cost ◽  
Large Mass ◽  
Impact Testing ◽  
Taylor Impact ◽  
Taylor Impact Test ◽  
The Impact

Taylor impact test is characterized by high impact energy, low cost, and good repeatability, giving it the technical foundation and development potential for application in high-g loading. In this paper, the feasibility of performing high-g load impact testing to a missile-borne recorder by conducting Taylor impact test was studied by combining simulation analyses with experimental verification. Acccording to the actual dimensions of the missile-borne recorder, an experimental piece was designed based on the Taylor impact principle. The impact loading characteristics of the missile-borne recorder were then simulated and analyzed at different impact velocities. In addition, the peak acceleration function and the pulse duration function of the load were fitted to guide the experimental design. A Taylor-Hopkinson impact experiment was also conducted to measure the impact load that was actually experienced by the missile-borne recorder and the results were compared with the results of strain measurements on the Hopkinson incident bar. The results showed that the peak value of impact load, the pulse duration and the waveform of the actual experimental results were in good agreement with the results predicted by the simulations. Additionally, the strain data measured on the incident bar could be used to verify or replace the acceleration testing of the specimen to simplify the experimental process required. Based on the impact velocity, high-g loading impact was achieved with peak values in the 7,000–30,000 g range and durations of 1.3–1 ms, and the waveform generated was a sawtooth wave. The research results provide a new approach for high amplitude and long pulse duration impact loading to large-mass components, and broaden the application field of Taylor impact test.

scholarly journals Healthy-Canteen Displays: A Tactic to Encourage Community Sport Canteens to Provide Healthier Food and Beverage Options

2021 ◽  
Vol 18 (19) ◽  
pp. 10194
Author(s):  
Gina Trakman ◽  
Kiera Staley ◽  
Adrienne Forsyth ◽  
Brooke Devlin ◽  
Anne Skiadopoulos ◽  
...  
Keyword(s):  
Low Cost ◽  
Health Behaviours ◽  
Healthy Foods ◽  
Traffic Light ◽  
Physically Active ◽  
Community Sport ◽  
Trade Show ◽  
Food And Beverage ◽  
Set Up ◽  
The Impact

(1) Background: Community sport settings present a range of conflicting health behaviours, including the tension between being physically active and consuming discretionary foods. Therefore, community sport settings are considered a promising location for health promotion. The aim of this project was to evaluate perceptions, knowledge and the impact (e.g., barriers and outcomes) of a healthy-canteen (cafeteria) display, based on traffic light labeling (TLL), which was set up at an Australian Basketball Association Managers’ Convention and Trade Show. (2) Methods: We set up a healthy ‘canteen display and surveyed Basketball managers on their perceptions of the display before (Survey 1) and after (Survey 2) visiting the display. Three months later they were surveyed (Survey 3) on changes made to their community sport canteens. (3) Results: Eighty-eight, 76 and 22 participants completed Surveys 1, 2 and 3, respectively. Participants believed stocking healthy foods and beverages was important (mean 8.5/10). Food waste, lack of consumer interest and price were identified barriers to stocking healthy foods. After visiting the display, 75% were inspired to make changes and 50% were surprised by the differences between their perceptions of the healthfulness of foods and the TLL ratings. Post-convention, 41% and 70% made or had planned healthy changes to their community sport canteen. (4) Conclusions: A healthy-canteen display is a low-cost, easy-to-implement strategy that may be able to direct self-driven improvement in the healthfulness of foods stocked at community canteens and lead to improved nutritional intakes at these venues.

Research on the Crashworthiness of Neotype Flexible Safety Fence

2012 ◽  
Vol 204-208 ◽  
pp. 1689-1692
Author(s):  
Zheng Bao Lei ◽  
Li Hong Li ◽  
Mu Xi Lei ◽  
Chen Chen Chen
Keyword(s):  
Impact Test ◽  
Lateral Displacement ◽  
Full Scale ◽  
Element Analysis ◽  
Evaluation Standard ◽  
Analysis Computer ◽  
Set Up ◽  
The Impact ◽  
Fence Methods

In order to identify the crashworthiness of neotype flexible safety fence, methods was created by conducting FEA (finite element analysis) computer simulation and full-scale impact test based on the current available evaluation standard. Above all, the model of “vehicle-guardrail” was set up based on virtual proving ground (VPG) pretreatment software, the safety in the impact between vehicle and neotype flexible safety fence were studied from the aspects of the moving locus of vehicle, the acceleration of vehicle and the maximum lateral displacement of guardrail etc. Secondly, full-scale impact test was conducted for the guidance quality of guardrail to the tested vehicle. The test results indicated that the neotype flexible safety fence was inconspicuous to the tested-car, which was basically the same to the simulation results, and the evaluation parameter of guardrail met the acceptance criteria.

scholarly journals An Experimental Comparison of Simple Measurements Used for the Characterization of Sand Equestrian Surfaces

Animals ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 2896
Author(s):  
María Alejandra Blanco ◽  
Raúl Hourquebie ◽  
Kaleb Dempsey ◽  
Peter Schmitt ◽  
Michael (Mick) Peterson
Keyword(s):  
Moisture Content ◽  
Impact Test ◽  
Time Domain Reflectometry ◽  
Experimental Comparison ◽  
Performance Parameters ◽  
Test Device ◽  
Testing Tools ◽  
Quantitative Measurements ◽  
The Impact

Quantitative measurements of performance parameters have the potential to increase consistency and enhance performance of the surfaces as well as to contribute to the safety of horses and riders. This study investigates how factors known to influence the performance of the surface, incorporation of a drainage package, control of the moisture control, and introduction of a geotextile reinforcement, affect quantitative measurements of arena materials. The measurements are made by using affordable lightweight testing tools which are readily available or easily constructed. Sixteen boxes with arena materials at a consistent depth were tested with the Going Stick (GS), both penetration resistance and shear, the impact test device (ITD), and the rotational peak shear device (RPS). Volumetric moisture content (VMC %) was also tested with time–domain reflectometry (TDR). Results obtained using GS, RPS, ITD, and TDR indicate that the presence of the drainage package, moisture content, and geotextile addition were detected. Alterations due to combinations of treatments could also be detected by GS, ITD, and TDR. While the testing showed some limitations of these devices, the potential exists to utilize them for quality control of new installations as well as for the monitoring of maintenance of the surfaces.

scholarly journals Using the Plate-Creep test to determine the impact strength properties of concrete

2021 ◽  
Author(s):  
Murat Gökçe ◽  
Keyword(s):  
Impact Strength ◽  
Creep Test ◽  
Impact Test ◽  
Impact Resistance ◽  
Strength Properties ◽  
Test Results ◽  
Test Device ◽  
Concrete Mixtures ◽  
Repetitive Impact ◽  
The Impact

The paper aims to design a concrete against repetitive impact and abrasion resistance. Macro/micro steel fibers and two types of crushed stone based on limestone and corundum as aggregate were used in concrete mixtures. Impact test device has been modified, designed and used for impact strength testing of concrete. The usability of the plate creep test in determining the impact strength of concrete was also investigated. According to the test results, a high correlation was found between the abrasion, impact resistance tests and the creep test.

scholarly journals An Experimental Comparison of Simple Measurements used for the Characterization of Sand Equestrian Surfaces

2021 ◽  
Author(s):  
Maria Alejandra Blanco ◽  
Raúl Hourquebie ◽  
Kaleb Dempsey ◽  
Peter Schmitt ◽  
Michael "Mick" Peterson
Keyword(s):  
Moisture Content ◽  
Impact Test ◽  
Time Domain Reflectometry ◽  
Experimental Comparison ◽  
Performance Parameters ◽  
Test Device ◽  
Testing Tools ◽  
Quantitative Measurements ◽  
The Impact

Quantitative measurements of performance parameters has the potential to increase consistency and enhance performance of the surfaces as well as to contribute to the safety of horses and riders. This study investigates how factors known to influence the performance of the surface, incorpo-ration of a drainage package, control of the moisture control, and introduction of a geotextile reinforcement, affect quantitative measurements of arena materials. The measurements are made by using affordable lightweight testing tools which are readily available or easily constructed. Sixteen boxes with arena materials at a consistent depth were tested with the Going Stick (GS), both penetration resistance and shear, the impact test device (ITD), and the rotational peak shear device (RPS). Volumetric moisture content (VMC %) was also tested with time-domain reflectometry (TDR). Results obtained using GS, RPS, ITD, and TDR indicate that the presence of the drainage package, moisture content, and geotextile addition were detected. Alterations due to combinations of treatments could also be detected by GS, ITD, and TDR. While the testing showed some limi-tations of these devices, the potential exists to utilize them for quality control of new installations as well as for the monitoring of maintenance of the surfaces.

scholarly journals Ski Position during the Flight and Landing Preparation Phases in Ski Jumping Detected with Inertial Sensors

Sensors ◽  
2019 ◽  
Vol 19 (11) ◽  
pp. 2575
Author(s):  
Veronica Bessone ◽  
Johannes Petrat ◽  
Ansgar Schwirtz
Keyword(s):  
Inertial Sensors ◽  
High Reliability ◽  
Reaction Force ◽  
Movement Pattern ◽  
Jumping Performance ◽  
Ski Jumping ◽  
Landing Impact ◽  
Fast Placement ◽  
Set Up ◽  
The Impact

Ski movement plays an important role during landing preparation, as well as in the whole ski jumping performance. Good landing preparation timing and correct ski position increase the jump length and reduce the impact forces. Inertial motion units (IMUs) placed on the skis could constitute a promising technology for analyzing the ski movements during training. During regular summer trainings, 10 elite athletes (17 ± 1 years) performed jumps while wearing IMUs and wireless force insoles. This set-up enabled the analysis of a possible correlation between ski movements and ground reaction force (GRF) during landing impact. The results showed that the pitch during the landing preparation is the most influential movement on the impact kinetic variables since it is related to the angle of attack, which affects the aerodynamics. The ski position at 0.16 s before landing did not influence the kinetics because the athlete was too close to the ground. During the impact, the roll angle did not correlate with GRF. Moreover, each athlete showed a different movement pattern during the flight phase. Concluding, the combination of IMUs and force insoles is a promising set-up to analyze ski jumping performance thanks to the fast placement, low weight, and high reliability.

Impact Test and Error Analysis of N80 Waterproof Casing

2013 ◽  
Vol 816-817 ◽  
pp. 317-321
Author(s):  
Lei Shi ◽  
Wei Ma ◽  
Jian Yan ◽  
Hong Zhang ◽  
Zhi Min Li ◽  
...  
Keyword(s):  
Impact Test ◽  
Sample Selection ◽  
Testing Machine ◽  
Impact Testing ◽  
Impact Surface ◽  
Measurement Results ◽  
Causes Of Errors ◽  
Shock Resistance ◽  
The Impact ◽  
Pendulum Impact

N80 waterproof casing is a kind of important equipment in petroleum drilling. In order to analyze the mechanical features of the N80 casing, we used pendulum impact testing machine to test the shock resistance of N80 casing. And we have analyzed and eliminated the errors which may affect the result of the impact test to ensure the reliability. At the same time, it summed up the causes of errors and the methods to avoid and reduce the errors during the pendulum impact test, and analyzed the sample selection method, the chosen of impact surface, the structure as well as the temperature influence, shape and other factors which influenced the measurement results.

Investigation of Silver Migration Impacts on Microwave Systems Fabricated on LTCC Substrate Under High-Power RF Excitation and High Temperature and Humidity Conditions.

2010 ◽  
Vol 2010 (1) ◽  
pp. 000242-000247
Author(s):  
Deepukumar M. Nair ◽  
K. M. Nair ◽  
Ken Souders ◽  
Michael Smith ◽  
Mark McCombs ◽  
...  
Keyword(s):  
Electric Fields ◽  
High Power ◽  
High Reliability ◽  
Low Cost ◽  
Real Life ◽  
Operating Conditions ◽  
Material System ◽  
Test Conditions ◽  
Rf Excitation ◽  
The Impact

The demand for cost effective LTCC systems has led to increasing use of silver based thick film conductors for inner layers of RF modules. There exists some level of concern about the reliability of silver as a conducting material for electronic circuit packaging. This arises from the tendency of silver to migrate under the influence of electric fields when subjected to certain favorable environment conditions. However, previous research has shown that if silver is used in a properly designed LTCC system on inner layers, the LTCC dielectric forms a hermetic seal around the circuit pattern, which leads to a highly reliable circuit and a low cost solution. This paper describes the results of an investigation to characterize and quantify the impact of silver migration on real-life microwave systems fabricated with DuPont GreenTape™ 951 LTCC material system with silver metallization. A buried multilayer filter was chosen from an actual production design in a high-reliability application, and was tested at 15W of continuous RF power at 1.5 GHz under 85°C/85% temperature and relative humidity. The chosen test conditions were meant to simulate actual operating conditions encountered by the circuit in real-world, high reliability applications. The focus of this work is to collect useful operational information under environmental stresses encountered in typical applications. To this effect, unlike previously reported work [1 ], [2 ], [3 ] by proponents of silver, the work described in this paper is not forcing silver to migrate, but rather tries to evaluate the performance of an actual application circuit fabricated with silver under high-reliability test conditions and high power, high frequency RF excitation. Material characterization data as well as RF performance data – in terms of S parameters and power delivered – indicates no evidence of detrimental effects or performance impairments due to silver migration or other mechanisms.

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