What is impact test?
The impact test involves subjecting a coated sample to
controlled impacts and observing the resulting damage. The severity of the
impact is gradually increased until visible damage, such as cracking, chipping,
or detachment of the coating, occurs. The test can be conducted using different
methods and equipment, such as pendulum impact testers or falling weight impact
testers, depending on the testing standards and the specific requirements of
the project.
Standards for Impact test?
The remaining impact test standards lay down the use of
absolute units of energy:
kg m (ISO 6272, ASTM D 2794),
Joule (ASTM D 3029, ECCA T5),
inch lbs (ASTM D 2794 and ASTM D 3029).
1 (Joule) = 0.1 kg m = 8.8 inch lbs
Calculation
Impact Force calculation: If a weight (m) 1.5 kg falling from height (h) of 0.65m. So, what will be the force (lbs per square inch)?
Velocity (v)=√2gh=
√2X9.81X0.65=3.57
So,
= ½
X1.5X(3.57)^2
=9.558
Joule
We know, 1Joule=0.1kgm=8.8 lbs/ square inch
So. 9.558Joule= 8.8X9.558=84.1104 inch-lbs/square inch
Thanks for reading. If you have any question please feel free ask me in comment box.
