58
M. S. Parmar et al.
The resultant falling height for knife with holder will be 1.33 m for 65 J striking
energy and for block it will be 2.04 m for 100 J striking energy.
The penetration depth of the blade in the plasticine is measured with a ruler.
Therefore, the resultant hole is excavated. A line diagram of test setup is shown
in Fig. 1 for testing stab and impact property of body protector. Figure-2 indicates
penetration or deformation of plasticine clay after test. Tests are carried out at 90°
angle on the body protector for stab and impact resistance. The striking energy was
60 J and 100 J for Stab (Knife) and Impact (Block) tests, respectively (Fig. 2).
The requirement for pass/fail as per standard is given in Table 1.
Stab (Knife) or impact ( Block)
Sample
Plasticine
Fig. 1 Testing arrangement stab and impact resistance as per VPAM KDIW 2004
(Edition18.05.2011)
Penetration/deform
ation
Fig. 2 After penetration of knife/deformation due to impact on Plasticine
Table 1 Stab (Knife) and Impact test requirement
Sr
no
Test
parameters
Specification
Angle Type of
test
Strike
Energy
(Joules)
Permitted value
(mm)
Stab resistance
test (Knife)
VPAM KDIW
2004:18/05/2011
90 0
Stab-Knife 65
<20 (Penetration
depth)
Impact resistance
test (Block)
Impact
100
<20 (Deformation
depth)