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ISO 11093-8:2017 Paper and board - Testing of cores - Part 8: Determination of natural frequency and flexural modulus by experimental modal analysis
standard by International Organization for Standardization, 06/01/2017
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Full Description
ISO 11093-8:2017 specifies a method for the determination of the flexural modulus by using experimentally measured natural frequencies in the free-free mode of transverse vibration of cylindrical paper and board cores, which meet the following criteria:
- internal diameter:
50 mm to 350 mm;
- minimum wall thickness:
0,02 + internal diameter or not less than 2,0 mm;
- minimum length of core:
8 + internal diameter.
NOTE For the determination of the flexural modulus by the three-point method, see ISO 11093-7.