ICIT – Energy Method

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ICIT – Energy method

ICIT low-blow technique

The ICIT− Energy method is an experimental method for recording crack resistance (R) curves under dynamic (impact) loading, e.g. in instrumented Charpy impact tests (see also: Impact loading pendulum impact tester).

The energy method is based on a variation in stable crack growth Δa measured with different hammer energies E at a constant test velocity v. However, the so-called low-blow technique is more commonly used in technical applications, in which the change in the energy applied to the test specimen is achieved by minor changes in the hammer velocity. This is achieved by varying the release angle of the pendulum hammer under otherwise identical test conditions (Fig. 1).

Fig. 1:

Technical realisation of the energy method in the instrumented Charpy impact test (ICIT)

See also

• Instrumented Charpy impact test
• ICIT – Experimental conditions
• Impact loading plastics
• Impact loading pendulum impact tester
• Test velocity

References

• Angelino, G., Fossati, G.: 5. Intern. Conference on Fracture, Cannes, France (1981) Vol. 5, pp. 2345–2352
• Thaulow, C., Kirkemo, F., Lereim, J.: Determination of the initiation toughness prior to ductile tearing during rapid loading. Internat. J. Fracture 23 (1983) R 65−72; https://link.springer.com/article/10.1007/BF00042821#citeas