Tw owheeler Helmet study

7/31/2019 Tw owheeler Helmet study

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Module Code PDN- 2521.

Module Name Design Methodology and Research.Course M.Sc. (Engineering) in Product Design.

Department Department of Design.

Name of the Student CHETAN. KALE.Reg. No BTB0411013.

Batch Part-Time 2011.

Module Leader Prof. M. N. Sudhindra Kumar.

M.S.Ramaiah School of Advanced Studies

Postgraduate Engineering and Management Programmes(PEMP)

#470-P Peenya Industrial Area, 4th Phase, Peenya, Bengaluru-560 058

Tel; 080 4906 5555, website: www.msrsas.org


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TWO WHEELER HELMET

Two wheeler helmets is a safety device used by two wheeler rider.

This helmet is used to protect the riders head during impact on road

accidents thus saves the life of a rider by preventing head injury.

Many helmets come with additional features along with safety as basic

requirement such as face shield, protection to the ears, ventilation, etc.

Figure 2.1 shows riders are riding two wheeler without using helmets.

Figure 2.1 shows riders without using helmets.


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Full Face Helmet.

These types of helmets cover the entirehead of a rider and thus these are called as safest

among any helmet for two wheelers. These types of

helmet cover from the base of the skull at rear to a

protective strip over the chin at the front. This

helmet not only protects the head but also protects

the mouth and jaw. These helmets have a cut out

from nose to fore head and it is covered with

transparent plastic face shield for visibility on the

road. Figure 2.3 and figure 2.4 show the image of full

face type of helmets.

Many riders prefer to have full face type of

helmet for its high protectiveness. These helmets

will have air vents to have the ventilation for the

face and head while using but still it lacks the with

sufficient air flow within the helmet.

TYPES OF HELMET

Figure 2.4 Full face helmet 2

Figure 2.3 Full face helmet 1


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Off-Road Helmet.

Off-road helmets are similar to the fullface helmets with elongated chin bar and

elongated plastic transparent face shield. The

intention of extending the transparent face shield

is to provide the access to the rider to wear

goggles while riding. The elongated type of chin

bar provides the air flow to the face through chin

with the sufficient gap between riders chin and

chin bar. These helmets also have the extended

strip on the top of the outer periphery to protect

from sun rays out the eyes of the rider. Figure 2.5

and figure 2.6 show the off-road type of helmets.

TYPES OF HELMET

Figure 2.5 Off-Road helmet 1

Figure 2.6 Off-Road helmet 2


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Open Face Helmet.

These helmets are similar to full facehelmet except the lack of chin bar. These types of

helmets provide 75% of protection out of full face

helmets to the head. This helmet covers ears, cheeks

and head. These helmets provides the same

protection as full face helmet to the head and rear

side of the head but does not give any protection to

the face, jaws and chin. While riding with this

helmet on rider will face the problems like dust,

wind, insects or even bugs to the face and eyes

which will make riding difficulty to the rider.

Figure 2.7 and figure 2.8 shows the open

face type helmets. These helmets come with plastic

transparent shield as shown in figure 2.8 to protect

the face from insects, dust and wind.

TYPES OF HELMET

Figure 2.7 Open face helmet 1

Figure 2.8 Open face helmet 2


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HalfHelmet.

These helmets are similar to open face helmet at the front but it lacks theprotection at the back portion of the head. The shape of half helmet is like a round

bowl putting in reverse on riders head. This type of helmet provides very less

protection when compared with any other helmets for two wheelers. Figure 2.9

shows half helmet and Figure 2.10 shows a rider wearing half helmet. As this

helmet provides open to the face thus it does not protect the face from wind, dust,

insects and bugs while riding two wheelers.

TYPES OF HELMET

Figure 2.9 Half helmet 1 Figure 2.10 Half helmet 2


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Modular Helmet.

Modular helmets are like both full face helmets and open face helmets.

These helmets have a flip up option for chin bar which can be converted to full face

or open face helmet at any time. When these helmets are fully closed it gives thesame protection of full faced helmets and when chin bar is flipped up it gives the

protection similar to open face helmets. This helmet will help the rider to provide

access to the face when flipped up the chin bar which can be used to drink, eat or

speak without removing the chin bar from the helmet. These are the most popular

helmets in todays market. Figure 2.11 shows the modular helmet in closed positionand figure 2.12 shows the modular helmet with flipped up position.

TYPES OF HELMET

Figure 2.11 Modular helmet closed Figure 2.12 Modular helmet open


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Most of the helmets are constructed with plastic material. Few helmets are

made from fiber glass with reinforced carbon fiber but these helmets are

little expensive than the normal helmets. The outer shell of the helmet ismade from plastic or fiber material and the inner portion of the helmet is

made from Polystyrene foam. The intention is to make the outer shell strong

and stiff and inner part is made from polystyrene foam to provide the cushion

to the skull if the rider.

The outer shell of the helmet is intentionally made hard. This is to provide

the safety by preventing penetration by a pointed object which might

penetrate through the helmet into the skull and also to provide the structure

as well as support to the inner line which is used to stick the thick foam to

inner surface of the plastic shell. The foam is very thick and flexible which not

only provides cushioning effect but also provides the flexible to fit the head

easily inside the helmet.

HELMET CONSTRUCTION


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Different countries follow different safety standards and use the different

safety standard names to identify the safety on the helmet. India has the ISI

(Indian standard Institute) mark which is laid by Bureau of Indian Standards(BIS). ISI mark is the most recognized mark for safety standards in Indian

subcontinent. Figure 2.24 shows the ISI mark of Indian safety standard.

This ISI mark is mandatory in India for two wheeler helmet. India law has

made mandate to use the helmet with ISI mark on it. The ISI mark is printed on

the rear side of the helmet as shown in Figure 2.25.

SAFETY STANDARD FOR HELMET IN INDIA

Figure 2.24 ISI mark of Indian safety standard. Figure 2.25 ISI mark on helmet.


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THANK YOU

Tw owheeler Helmet study

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