impact-test specimen

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• impact test — Test 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… …   Universalium

• impact test — a test designed to give information on how a specimen of a known material will respond to a suddenly applied stress, e.g. shock. The test ascertains whether the material is tough or brittle. A notched test piece is normally employed and the two… …   Mechanics glossary

• Charpy impact test — v · d · e Materials failure modes Buckling · …   Wikipedia

• Izod impact test — a test specimen, usually of square crossed section is notched and held between a pair of jaws, to be broken by a swinging or falling weight. When the pendulum of the Izod testing machine is released it swings with a downward movement and when it… …   Mechanics glossary

• pendulum impact test — The standard test methods are the Izod and Charpy tests; the specimens have a standard notch machined in them, and the impact energy absorbed in breaking the specimen is recorded …   Dictionary of automotive terms

• test bar — A test specimen with the shape of a bar as used in the impact resistance test …   Dictionary of automotive terms

• Proof test — A proof test is a test wherein a deliberately overpressured round is fired from a firearm in order to verify that the firearm is not defective and will not explode on firing. The firearm is inspected after the test, and if it is found to be in… …   Wikipedia

• HIV test — Randall L. Tobias, former U.S. Global AIDS Coordinator, being publicly tested for HIV in Ethiopia in an effort to reduce the stigma of being tested.[1] HIV tests are used to detect the presence of the human immunodeficiency virus (HIV), the virus …   Wikipedia

• Izod test — An impact resistance test in which the specimen is held as a vertical cantilever beam and is broken by a single swing of a pendulum, with the line of initial contact at a fixed distance from the specimen clamp and from the centerline of the notch …   Dictionary of automotive terms

• Charpy test — An impact resistance test in which the specimen is supported as a horizontal beam and broken by a single swing of a pendulum with the impact line midway between the supports and directly opposite the notch for notched specimens …   Dictionary of automotive terms

• materials testing — Introduction       measurement of the characteristics and behaviour of such substances as metals, ceramics, or plastics under various conditions. The data thus obtained can be used in specifying the suitability of materials for various… …   Universalium