Paper and board — Testing of cores — Part 8: Determination of natural frequency and flexural modulus by experimental modal analysis
绘制并绘制每瓶命名卷8:样本模块和狗狗频率时态 并进行实验分析
发布日期:
2017-06-15
ISO 11093-8:2017规定了一种通过使用圆柱纸和纸板芯横向振动自由-自由模式下的实验测得的固有频率来确定弯曲模量的方法,该固有频率满足以下标准:
-内径:
50毫米至350毫米;
-最小壁厚:
0.02×内径或不小于2.0mm;
-芯的最小长度:
8×内径。
注:关于用三点法测定弯曲模量,见ISO 11093-7。
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.