IZOD IMPACT TEST USING AVERY IMPACT MACHINE.

IZOD IMPACT TEST USING AVERY IMPACT MACHINE.

APPARATUS

The apparatus used in the experiment includes:

Ø  The Avery Impact Machine

Ø  Bottles of different products(HI MALT, MALTINA and MARTONIC bottles)

Specimen A is HI MALT bottle

Specimen B is MALTINA bottle

Specimen C is MARTONIC bottle.

THEORY

IMPACT TEST

This test indicates the toughness of a material and it is used to measure the capacity of a material to resist shock loadings.

Brittleness resulting from incorrect heat treatment will always be evident in an impact test.

The two main types of Impact test that we have are:

Ø  Izod Impact test                      and

Ø  Charpy Impact Test.

  

PRE LABORATORY PROCEDURE

The entire different specimens (i.e. the different Bottle Products) were readily obtained.

LABORATORY PROCEDURE

·         The arm of the Avery Impact Machine was allowed to swing freely to ensure that it has freedom of movement.

·         Using the positioning gauge, the Specimen A was inserted in the anvil and rigidly was secured by the arm of the lever.

·         The pendulum pointer was set to the upper limit of the scale.

·         The pendulum was secured by supporting it on the release trigger.

·         The already secured pendulum was then raised to its maximum height and was released when the release trigger was relaxed.

·         Corresponding energy was duely recorded (this energy is the energy absorbed by the specimen) as indicated by the loose registering pointer on the scale.

·         After breaking the Specimen, the pendulum always swings back towards the release gear and was always caught by hand and then lowered on the rest.

·         This process was repeated for other Specimens and the result obtained were duely recorded as given TableI

S

DATA AND CALCULATION

The data obtained during the course of the experiments is given as contained in the table below:

            TableI

S/N	HI MALT	MALTINA	MARTONIC
1	80.00	75.00	72.00
2	75.00	85.00	74.00
Average	72.50	80.00	73.00

          For Specimen A (HI MALT)

                      Average= 80.00+70.00/2        = 72.50J

            For Specimen B (MALTINA)

                      Average= 75.00+85.00/2         = 80.00J 

            For Specimen C (MARTONIC)

                         Average= 72.00+73.00/2       = 73.00J 

OBSERVATION

During the course of the experiment we could observe that:

·         The protruding part of the experiment was broken completely.

·         On the part of the Avery Machine used, the pointer was always at the upper limit of the scale as its rest position.

PPRECAUTION

Some of the precautive measures adopted during the course of the experiment were as below:

·         All the specimens were tightly gripped in the anvil.

·         The pendulum was secured before setting specimens in the anvil to avoid injury and or accident.

·         Since the bottles were to break, we thus ensured that a convincing distance was kept between us and the Avery Impact Machine before the release of the pendulum .

·         The pendulum was always raised to its maximum height before its release to ensure accurate reading and accidents.

·         Parallax error was ensured and avoided when taking readings.

·         The pointer was always set to the upper limit of the scale to ensure accurate readings/measurement.

ERROR

Some of the various types of error that may undermine the outcome of the experimental result includes:

*      Human Error

*      Systemic Error (old age of the instruments and apparatus used)

 *      Random Error (drought and environmental air effect).

CONCLUSION

From the laboratory results deduced, it can be concluded that different products of different materials have varying ability to resist shock loadings, hence have different impact energy.