- Izod impact strength test
Izod impact strength testing is an
ASTMstandard method of determining impact strength. A notched sample is generally used to determine impact strength.
The test is named after the English engineer Edwin Gilbert Izod (1876-1946), who described it in his 1903 address to the
British Association, subsequently published in "Engineering". [Izod, Gilbert, 'Testing brittleness of steel', "Engineering", 25 September 1903, pp. 431-2]
Impact is a very important phenomenon in governing the life of a structure. In the case of aircraft, impact can take place by the bird hitting the plane while it is cruising, during take off and landing there is impact by the debris present on the runway
An arm held at a specific height (constant potential energy) is released. The arm hits the sample and breaks it. From the energy absorbed by the sample, its impact strength is determined.
The Izod impact test differs from the
Charpy impact testin that the sample is held in a cantilevered beam configuration as opposed to a three point bending configuration.
This test can also be used to determine the notch sensitivity.
Charpy impact test
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