M00000103
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ISO 11093-8 3rd Edition, June 1, 2017 Paper and board - Testing of cores - Part 8: Determination of natural frequency and flexural modulus by experimental modal analysis
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Availability date: 07/13/2021
Description / Abstract:
This document 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.