Department of Engineering Technology
CET 345W Materials Testing Laboratory
Experiment No. 4 – Impact Test
Prepared by: Andrew L. Kong
UIN: 1094864
Major: CET – Civil Engineering Technology
Site of Record: Norfolk,
...
Department of Engineering Technology
CET 345W Materials Testing Laboratory
Experiment No. 4 – Impact Test
Prepared by: Andrew L. Kong
UIN: 1094864
Major: CET – Civil Engineering Technology
Site of Record: Norfolk, Virginia
Date: June 22, 2019
Old Dominion University
Civil Engineering Technology Department
Kaufman Hall, Room 149
Norfolk, VA 23529
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Table of Contents
1. Summary …………………………………………….…………………………… 2
2. Procedure ……….………………………………………………………………… 3
3. Equipment ……………………..………………….……………………………… 4
4. Experiment Requirements ….……..………………………………………………. 6
5. Required Data ……………..…….………………….…………………………….. 7
6. Sample Calculations …..……..…….……………….…………………………….. 11
7. Sketches/Graphs ……………..…….……………….…………………………….. 13
8. Conclusions/Analysis …………………………….………………………………. 15
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1. Summary
This test is aim to teach students how to do an impact test. The test should give the resistance
of any particular notched metallic specimen to fracture under particular type of blow. To do the
experiment, the students will be used to measure the amount of energy is stored on a material
during facture. The specimen used in the experiment which will include a notched metallic bar.
The students will do the most common impact test for metallic materials which is called the
Charpy. The experiment will require two types of Charpies. One type of the Charpies will be hot
and the other type will be cold. It employs the pendulum principle.
During the test, you will see the swing of the pendulum. As a result, the small notched
specimens will be broken during the flexure. The notch on the specimen must face away from
the striking edge of the pendulum. . A notch shows imperfection in the system, and initiate
failure at a location. The potential energy is found when the pendulum in the starting stationary.....................................CONTINUED
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