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A First for Motorcycle Helmets

solidThinking : Design and Stile

Head protection and injury reduction are be the primary goal of motorcycle

helmets. Safety standards are in place to enforce an increasing level of pro-

tection to greatly reduce injuries and fatalities in motorcycle accidents. But

these days people are becoming more fashion conscious and proud in wear-

ing a comfortable safety apparel adopting the latest technology. This is whyHyperWorks is the preferred solution to quickly respond to rapidly changing

trends of fashion or for the most demanding safety and aerodynamic evalua-

tion that set you apart from your competition.

t +1 248.614.2400 f +1 248.614.24111820 E. Big Beaver Rd. Troy, MI 48083-2031 USA www.altair.com

www.altair.com

Solidthinking is a breakthrough 3D modeling and

rendering environment that sets a new productiv-

ity standard for product design and presentation.

It delivers all the tools for the creation of high

quality, professional 3D models and the power to

render helmets with unsurpassed photorealism.

Solidthinking nd pathways to winning designs

sooner and reduce helmets product develop-

ment cost while boosting designer productivity

and creativity.

RADIOSS: Exceed Safety Requirements

HyperWorks & Altair Product Design Design and stile

Safety evaluation

Aerodynamic and comfort

Engineering Consulting

The helmets main job is to protect the brain by spreading the impact energy over the widest area to

reduce head injuries. This is achieved by designing an outer shell of optimal rigidity and strength able

to withstand a severe impact and a softer crashable inner shell underneath able to spread the load

and extend the time over which the helmets stops. Both comfort and safety have a role in the helmet

design and computer simulation with RADIOSS helps identifying the best density distribution for the

foam and evaluate the performance of the different materials used for the outer shell. RADIOSS easily

simulates impact against helmet made of different materials, from expanded polystyrene or berglass

to latest carbon ber composite. Altair has extensive knowledge in design composites structures and

HyperWorks is used to study the bene ts of different ber positions, number of layers, material type

and gauges to obtain the desirable performance.

Attachment such as spoilers, ducts and vents are used for both practical and style purpose. They cre -

ate complications to the safety design of an helmet because they add weakening areas to the protec-

tive shell and may produce unpredictable twists during a crash event. HyperWorks can help the design

of such areas by guiding the user to choose the best location, material, and shape of the anchor screw

that will break at impact.

As important but sometimes neglected area of research is the chin strap meant to keep the helmet

tightly on the head during an accident no matter the direction of impacts. The retention system

strength and dynamic can be simulated and the potential areas of failure identi ed and improved.

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t +1 248.614.2400 f +1 248.614.24111820 E. Big Beaver Rd. Troy, MI 48083-2031 USA www.altair.com

Engineering Consulting

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Altair ProductDesign is a global multi-disciplinary development consultancy

of more than 500 designers, engineers, scientists and creative thinkers.

Combining the HyperWorks suite with our expertise in product development and

process automation allows us to signi cantly shorten our clients traditional

design cycle and deliver innovative engineering solution. For example different

analysis can be easily setup up by using a wide range of speeds and direction

for the anvil during the impact testing. Different helmet sizes or head form

shapes could be interchanged and so can the anvil geometry used. This leaves

time to explore additional scenarios that even if not required by the regulation

could identify areas of improvement and increase performance particularly for

helmets used in competition.

The evaluation of the protective performance of a new helmet is complicated

by the growing number of helmets safety standards in place in the world.

Adopting virtual prototyping will reduce time and costs, offering more

opportunities to design exploration and to judge the effectiveness of a

motorcycle helmet in an accident.

AcuSolve : Aerodynamic and Comfort

AcuSolve is a leading (CFD) Computational Fluid Dynamics ow solver with superior robustness, speed, and accuracy. AcuSolve is used to increase theaerodynamic performance of the entire helmet, or smaller areas like spoilers and ducts reducing the need of a wind tunnel.

Acusolve is used to quickly validate geometry changes to the helmet shape and to ne tune new pro les. Optimization of air ow for maximum stability as well

as studies to minimize lift, turbulence, buffeting are among its bene ts.

Fluid Dynamics simulation with Acusolve is used to study demisting and fog clearing from the visor, to reduce noise and to enhance comfort maximizing the

exhaust of hot air and designing innovative vent channeling systems.

Motorcycle Helmet Safety Standard Laws

Region Countries Safety Standards

Europe ECE 22.05

North America USA & Canada DOT FMVSS-218

Asia/Pacifc JapanTaiwanSouth KoreaThailandSingaporeIndiaAustraliaNew Zealand

SG or JISCNSKS G 7001TISPSBIS 4151AS 1698-2006NZ 5430

South America Brazil NBR 7471

Independant Standards : Snell SA2005 USA, SHARP-ACU UK