ENTRAP ERGONOMIC SOLUTION FOR ... - WordPress.com

Che Husna Azhari
*
, Andanastuti Muchtar
*
, Mariyam Jameelah Ghazali
*
,


Noraiham Mohamad
*,**
, Iylia Arif Elias
*
,

*

Faculty of Engineering & Built Environment, Universiti Kebangsaaan Malaysia, 43600 Bangi, Selangor, Malaysia.

**
Faculty of Manufacturing, Universiti Teknikal Malaysia Melaka, Hang Tuah Jaya, 76100

Durian Tunggal, Melaka, Malaysia.

Introduction


•
Behind

Armour

Blunt

Trauma

(BABT)

is

the

non
-
penetrating

injury

resulting

from

the

rapid

deformation

of

armours

covering

the

body
.

In

extreme

circumstances,

the

BABT

may

result

in

death,

even

though

the

projectile

has

not

perforated

the

armour
.



•
Two

principal

reasons

for

its

growing

prominence
:

1.
an increase in
the calibre
and available energy of
bullets

2.
the desire of the designers of personal armour
systems to reduce the weight and thickness of
soft armours and armour plates.


•
Trauma

Pack

or

Trauma

Attenuating

Backing

Materials

or

Trauma

Plate

or

Trauma

Pad

placed

between

the

armour

system

and

the

body

to

absorb,

dissipate,

and

redistribute

energy

transferred

f r o m

t h e

a r mo u r s
.








ENTRAP

is

an

ergonomic,

sustainable,

and

eco
-
friendly

system

built

to

improve

the

impact

resistance

and

kinetic

energy

absorption

properties

of

protective

apparel
;

especially

in

ballistics

application
.

It

provides

a

structure

that

when

utilized

by

itself

or

in

conjunction

with

conventional

armour

configurations

and/or

assemblies

will

efficiently

absorb

and

dissipate

the

impact

energy

from

projectile,

fragment

and

missiles

as

well

as

non
-
ballistic

impact
.

It

is

a

system

of

composite

configuration

which

incorporates

a

value

added

indigenous

material

epoxidised

natural

rubber
-
alumina

composite

(ENRAN)

with

natural

silk

(NS)

utilizing

inherent

advantages

to

form

a

trauma

pack

panel
.

The

panel

comprises

of

at

least

one

layer

of

high

damping,

visco
-
elastic

and

flexible

ENRAN

having

hard

particles

(ultimate

particle

size

of

~

11

µm)

uniformly

distributed

in

the

material

and

multiple
-
layer

of

stitched

high

strength,

high

modulus,

and

lightweight

woven

NS

consists

of

1000

Denier

yarns

(warp

and

weft

density

of

31

yarns

per

inch)
.

The

materials

were

assembled

and

packed

together

using

woven

nylon

which

stitched

around

its

perimeter

for

comfort

and

aesthetic

purposes
.

The

invention

is

flexible

and

versatile

since

it

can

be

developed

to

suit

a

wide

range

of

application
;

ballistic

or

non
-
ballistic
.

Its

flexibility

to

be

contour

sensitive

is

an

important

consideration

in

gender
-
sensitive

protective

apparel
.

For

a

specific

application,

a

designer

may

utilize

these

two

materials

(ENRAN

and

NS)

in

a

variety

thickness

and

configuration

according

to

the

protection

level

needed
.







Novelty

&

Advantages

•

High

Damping

and

High

Energy

Absorption

•

Proven

to

increase

Ballistic

Limit

of

bullet

resistance

panel

•

Sustainable,

and

Eco
-
friendly

–
NR

&

silk

•

Ergonomic

(Lighter

&

Flexible

than

rubber

coated

steel)

•

Affordable

than

aramid
/
kevlar

soft

pack

•

Customizable

&

Versatile


For further information please contact:




Prof. Dr.
Che

Husna

Azhari


Faculty of Engineering & Built Environment,


UNIVERSITI KEBANGSAAN MALAYSIA, 43600,
Bangi
, Selangor,


Tel: 603
-
8921 3856


Fax: 603
-
8921 4590


Email: pghppkk@ukm.my, mek@vlsi.eng.ukm.my

16.425

107.475

198.525

289.575

380.625


Absorbed energy (J)


0.00


0.50


1.00


1.50


2.00

15.00

21.25

27.50

33.75

40.00


ENRAN



NSP

A : ENRAN = 1.00 cm

B : NSP = 26 plies

V
50
(m/s)

-
1.000

-
0.500

0.000

0.500

1.000

121.25

161.88

202.5

243.13

283.75

A

A

B

B

Deviation from Reference Point

Energy absorption of ENRAN
-
Natural

Silk
-
Polyester (NSP) panel

*NIJ Standard 0101.04
–

Ballistic Resistance of Personal Body Armour

Ballistic limit of ENRAN
-
Natural

Silk
-
Polyester (NSP) panel

*NIJ Standard 0101.04
–

Ballistic Resistance of Personal Body

Armour

•

Configuration

•

Thickness

•

Shape

•

Size