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impact test |
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impact testTest of the ability of a material to withstand impact, used by engineers to predict its behaviour under actual conditions. Many materials fail suddenly under impact, at flaws, cracks, or notches. The most common impact tests use a swinging pendulum to strike a notched bar; heights before and after impact are used to compute the energy required to fracture the bar (see strength of materials). In the Charpy test, the test piece is held horizontally between two vertical bars, much like the lintel over a door. In the Izod test, the specimen stands erect, like a fence post. See also testing machine. impact test [′im‚pakt ‚test] (engineering) Determination of the degree of resistance of a material to breaking by impact, under bending, tension, and torsion loads; the energy absorbed is measured in breaking the material by a single blow. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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| The ball impact test was found suitable for characterizing the toughness of intermetallic compound at the interface and evaluating reliability after drop impact. Material used in Test F4, which tested the effect of test temperature on impact resistance, also was submitted to low temperature Charpy impact test (Table 4). However, impact strength is reduced somewhat, though the amount depends on the impact test used. |
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