Petal formation law in a cellophane diaphragm subjected to a pressure difference
Petal formation law in a cellophane diaphragm subjected to a pressure difference
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压力差作用下玻璃纸隔膜中的花瓣形成定律
DOI：
10.1103/physreve.106.l043001
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发表时间：
2022
影响因子：
2.4
通讯作者：
and Akihiro Sasoh
中科院分区：
文献类型：
--
作者：
Gaku Fukushima ;Jun Hagiwara;Yusuke Nakamura ;and Akihiro Sasoh
在这项研究中，一层玻璃纸在气压差的作用下被用穿刺针刺破。相应地，通过高速成像在层中观察到花瓣状的碎裂。随后在实验上观察到了两种类型的裂纹扩展区域。当拉应力低于20.6 Mpa时，玻璃纸隔膜产生单一裂纹，其扩展速度低于高应力条件下的裂纹扩展速度。对于大于23.7兆帕的拉应力，裂纹扩展速度保持在大约0.86公里/S，即使在改变了低压侧的装置尺寸、压力和湿度之后也是如此。用作用在横隔膜上的拉应力的线性函数来表示距穿刺点等距离的裂纹数。
In this study, a layer of cellophane, subjected to an air-pressure difference, was ruptured using a piercing needle. Accordingly, petal-like fragmentation was observed in the layer via high-speed imaging. Two types of crack-propagation regimes were subsequently observed experimentally. If a tensile stress lower than 20.6 MPa acted on the cellophane diaphragm, a single crack was generated, whose propagation speed was lower than that under higher-stress conditions. For tensile stresses greater than 23.7 MPa, the crack-propagation speed remained constant at approximately 0.86 km/s, even after altering the device size, pressure, and humidity on the low-pressure side. The number of cracks equidistant from the piercing point was expressed as a linear function of the tensile stress acting on the diaphragm.