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NBN ISO 11093-8:2020
Paper and board — Testing of cores — Part 8: Determination of natural frequency and flexural modulus by experimental modal analysis
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Summary
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.
— 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.
Technical characteristics
| Publisher | Bureau de Normalisation Belge (NBN) |
| Publication Date | 11/19/2020 |
| Page Count | 16 |
| EAN | --- |
| ISBN | --- |
| Weight (in grams) | --- |
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