ISO 11093-8:2017

Paper and board — Testing of cores — Part 8: Determination of natural frequency and flexural modulus by experimental modal analysis ISO 11093-8:2017

Publication date:   Jun 15, 2017

Scope

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.