ICIT – Support Span Method

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ICIT – Support span method

General information

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

Implemantation of the Method

The support span method is based on a procedure whereby stable initial cracks are achieved by changing the ratio of the support span s or support distance to the specimen width W. The hammer energy E and the hammer velocity v remain constant. The method is therefore based on varying the maximum bending stress in the centre of the test specimens by changing the ratio of s/W (Fig. 1).

Fig. 1:

Implementation of the support span method in the ICIT

See also

• Crack resistance curve – Experimental methods
• Instrumented Charpy impact test
• Impact loading pendulum impact tester
• MPK-Procedure MPK-ICIT

References

• Grellmann, W.; Seidler, S.: Risszähigkeit von Kunststoff-Messungen bei dynamischer Beanspruchung. Materialprüfung 33, 7-8 (1991) 213−218