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NEN ISO 11093-8:2012被替代
Paper And Board - Testing Of Cores - Part 8: Determination Of Natural Frequency And Flexural Modulus By Experimental Modal Analysis
出版：Nederlands Normalisatie Instituut
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標(biāo)準(zhǔn)編號： NEN ISO 11093-8:2012
發(fā)布時間：2013/2/1 0:00:00
標(biāo)準(zhǔn)類別：Standard
出版單位：Nederlands Normalisatie Instituut
標(biāo)準(zhǔn)頁數(shù)：11
標(biāo)準(zhǔn)簡介
Describes 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 x internal diameter or not less than 2,0 mm; - minimum length of core: 8 x internal diameter.
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