Impact Tester
Impact testing machines evaluate an object's capacity to withstand high-rate loading and it is commonly used to determine the service life of a part or material. Impact resistance can be among the most challenging qualities to measure. The capacity evaluate this property is particularly useful in assessing product liability and safety.
There are two standard kinds of impact test: Charpy and IZOD. Charpy tests are commonly performed on metals, but a few plastics and polymers can also be tested. IZOD tests can be performed on either plastic or metal specimens. A Charpy test specimen is usually a 55 x 10 x 10 millimetre bar. An IZOD specimen is typically a 64 x 12.7 x 3.2-millimetre bar.
Testing Machines Inc. has 8 models of analog to digital impact testing equipment plus an automatic notch cutter and other options. These impact testers operate on a wide range of materials including plastic, ceramics, non ferrous metals, and some composites according to many ASTM and ISO Standards with methods like pendulum impact, falling dart, falling weight, and low temperature brittleness testing.
Impact tests are used to measure the resistance to failure of materials to a suddenly applied force. The test measures the impact energy, or the energy absorbed prior to fracture. ToronTech™ offers advanced Impact testing machines to measure that energy through drop weigh tear test and Charpy impact test. We also offer machines for the preparation of specimens for these tests.
Purpose
The purpose of an impact test is to determine the ability of the material to absorb energy during a collision. This energy may be used to determine the toughness, impact strength, fracture resistance, impact resistance or fracture resistance of the material depending on the test that was performed and the characteristic that is to be determined. These values are important for the selection of materials that will be used in applications that require the material to undergo very rapid loading processes such as in vehicular collisions.
Types
For a single impact test the three most popular types of test are the Charpy V-notch test, the Izod test and the Tensile Impact test. These three tests all essentially determine the same characteristics of the material but differ in the orientation of the test sample which causes the sample to be stressed in different directions and involve a known weight released from a known height colliding with the specimen in its test fixture. All of these tests are useful in determining the impact mechanics of the test specimen.