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International Centre For Automotive Tech.-Prateek Goel
  • Technical Paper
  • 2019-28-2458
To be published on 2019-11-21 by SAE International in United States
In today’s era, especially in young generation, the craze of motor bikes is really remarkable. As the bikers in our country are increasing, the road mishaps are also increasing day-by-day, due to which many deaths occur and most of them are caused by the negligence in wearing helmet. According to the Ministry of Road Transport and Highways, 1,50,785 people were killed in 4,80,652 road crashes in India in 2016. This translates into 55 crashes and 17 deaths every hour. In case of road crash deaths, Two-Wheeler topped the list with a percentage share of 29.42% followed by Trucks, Tempos, Tractors(25.9%) and Cars, Jeeps, Taxis (21.61%). In order to overcome the above mentioned problem, we are designing an intelligent system that detects the helmet and prevent the rider to ride the bike without wearing helmet which helps to reduce the death cases during an accident. Our task as an automobile engineer was to design a smart helmet that could automatically detected by the two-wheeler. A camera was installed near the speedometer (on the handle bar) of…

Ballistic Helmets

  • Magazine Article
  • TBMG-34133
Published 2019-04-01 by Tech Briefs Media Group in United States

3M St. Paul, MN 888-364-3577

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Tech Briefs: August 2018

  • Magazine Issue
  • 18AERP08
Published 2018-08-01 by SAE International in United States
Designing a High-Speed Decoy Unmanned Aerial Vehicle (UAV)Using Thermoplastics in Aerospace ApplicationsIn-Flight Real-Time Avionics AdaptationUsing Turbine Flow Meters for Aerospace Test and Measurement ApplicationsCommunicating from Space: The Front End of Multiscale ModelingLaser-Based System Could Expand Space-to-Ground CommunicationHydraulic Testing of Polymer Matrix Composite 102mm Tube Section Research could lead to development of a composite material that can be processed at a low temperature and still be used at 1000°F.Permeation Tests on Polypropylene Fiber Materials Study attempts to determine if polypropylene nanofiber materials can be used in air filtration systems to remove toxic vapors.Inter-Laboratory Combat Helmet Blunt Impact Test Method Comparison Ensuring consistent test methods could reduce the risk of head injuries.

Inter-Laboratory Combat Helmet Blunt Impact Test Method Comparison

  • Magazine Article
  • TBMG-32726
Published 2018-08-01 by Tech Briefs Media Group in United States

As the medical community learns more about brain injury, the importance of blunt impact mitigation becomes more apparent. As such, it is critical to make sure that research labs are not only capable of performing testing in this field, but also show inter-laboratory consistency and reproducibility. This study is a comparison between the two validated blunt impact testing labs (Aberdeen Test Center (ATC) and National Technical Systems (NTS) Chesapeake Testing Services (CTS)), and Natick Soldier Research Development and Engineering Center (NSRDEC).

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Evaluation on Properties of Industrial Workers Safety Helmet Using Natural Hybrid Composite

Mepco Schlenk Engineering College-Thanikachalam J, Vasiraja N, Vignesh V
Published 2018-07-09 by SAE International in United States
In this project work, composites were prepared by using matrix method in which good adhesion was generated by a combination of hand layup method. This experiment was conducted to evaluate the suitability of natural fiber composites using luffa fiber, palm fiber and bamboo fiber and to fabricate the safety helmet by combining these three fibers. Initially these fibers were treated in sodium hydroxide solution in order to improve fiber interfacial bonding. Generally, composites that contain treated fiber have a higher tensile modulus and greater flexural modulus than do untreated fiber composites. Here using 40% fibers and 60% matrix for fabricating natural composites and to investigate its tensile strength, flexural strength, impact strength and hardness strength. It was observed that the effects of reinforcing epoxy resin matrix with the fibers caused the composites to be more flexible and easily deform due to high strain values and reduction of high resonant amplitude. In the present study, an attempt has been made to reinforce, epoxy resin matrix with this proportion of these natural fibers and to characterize its…
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Open Access

Cellular Helmet Liner Design through Bio-inspired Structures and Topology Optimization of Compliant Mechanism Lattices

SAE International Journal of Transportation Safety

Indiana University, Purdue University-Joel C. Najmon, Jacob DeHart, Zebulun Wood, Andres Tovar
  • Journal Article
  • 2018-01-1057
Published 2018-04-03 by SAE International in United States
The continuous development of sport technologies constantly demands advancements in protective headgear to reduce the risk of head injuries. This article introduces new cellular helmet liner designs through two approaches. The first approach is the study of energy-absorbing biological materials. The second approach is the study of lattices comprised of force-diverting compliant mechanisms. On the one hand, bio-inspired liners are generated through the study of biological, hierarchical materials. An emphasis is given on structures in nature that serve similar concussion-reducing functions as a helmet liner. Inspiration is drawn from organic and skeletal structures. On the other hand, compliant mechanism lattice (CML)-based liners use topology optimization to synthesize rubber cellular unit cells with effective positive and negative Poisson’s ratios. Three lattices are designed using different cellular unit cell arrangements, namely, all positive, all negative, and alternating effective Poisson’s ratios. The proposed cellular (bio-inspired and CML-based) liners are embedded between two polycarbonate shells, thereby, replacing the traditional expanded polypropylene foam liner used in standard sport helmets. The cellular liners are analyzed through a series of 2D extruded…
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Neck Injury Response in High Vertical Accelerations and its Algorithmical Formalization to Mitigate Neck Injuries

Julie Klima, Jian Kang, AnnMarie Meldrum
Tank Automotive Research, Development, and Engineering Cente-Steven Pankiewicz
Published 2017-11-13 by The Stapp Association in United States
Tank Automotive Research, Development and Engineering Center (TARDEC) conducted a comprehensive analysis of data collected during the evaluation of head and neck impact during injurious and non-injurious loading. This evaluation included impact velocity, helmet to roof clearance, and neck angle using a fully instrumented Hybrid III head and neck assembly. The results of this effort were compared against post mortem human subject (PMHS) data from similar testing conducted in conjunction with the Warrior Injury Assessment Manikin (WIAMan) program. The results identified the most severe helmet to roof clearance and neck angles. TARDEC used this knowledge as the foundation for continued research into head and neck impact injury mitigation through the use of passive technology and interior vehicle design.
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Helmet Smart Foam Signals Potential Concussions in Real Time

  • Magazine Article
  • TBMG-27851
Published 2017-11-01 by Tech Briefs Media Group in United States

Most football fans have seen players get hit so hard they can barely walk back to the sideline. All too often in years past, those players were back on the field just a few plays later, despite suffering what appeared to be a head injury. While football-related concussions have been top of mind in recent years, people have struggled to create technology to accurately measure them in real time.

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Replicating Real-World Friction of Motorcycle Helmet Impacts and Its Effects on Head Injury Metrics

Biodynamic Research Corp-Joseph Cormier, Lars Reinhart
Biodynamic Research Corp.-Enrique Bonugli
Published 2017-03-28 by SAE International in United States
The purpose of this study was to determine the frictional properties between the exterior surface of a motorcycle helmet and ‘typical’ roadway surfaces. Motorcycle helmet impacts into asphalt and concrete surfaces were compared to abrasive papers currently recommended by government helmet safety standards and widely used by researchers in the field of oblique motorcycle helmet impact testing. A guided freefall test fixture was utilized to obtain nominal impact velocities of 5, 7 and 9 m/s. The impacting surfaces were mounted to an angled anvil to simulate an off-centered oblique collision. Helmeted Hybrid III ATD head accelerations and impact forces were measured for each test. The study was limited to a single helmet model and impact angle (30 degrees). Analysis of the normal and tangential forces imparted to the contact surface indicated that the frictional properties of abrasive papers differ from asphalt and concrete in magnitude, duration and onset. Reduction in head acceleration, both linear and angular, was observed when asphalt and concrete were used as the impact surface. Roofing shingle was determined to be a…
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Wheel Helmet to Reduce Landing Gear Noise

  • Magazine Article
  • TBMG-24557
Published 2016-05-01 by Tech Briefs Media Group in United States

Airframe noise, produced by unsteady flow around aircraft structures, is an important source of aircraft noise during approach and landing. Sound radiating from the undercarriage is a major contributor to airframe noise. This type of noise is broadband in nature, caused by the complex unsteady flow field associated with the multitude of bluff bodies of various sizes and shapes that collectively make up a landing gear. Previous noise reduction concepts rely on flow alteration and shielding of the more critical gear subcomponents such as the main post, torque links, etc. Such concepts include fairings made of flexible and rigid materials, porous fairings, and wire mesh screens.