Izvorni znanstveni članak

Polymer crazing and acoustic emission

Igor Grabec ; Faculty of Mechanical Engineering, Edvard Kardelj University of Ljubljana, pp. 394, 61000 Ljubljana, Yugoslavia

Sažetak

The formation of fibrils at the growing craze-tip is a sequential process which should act as a sound source. In the article the mechanism of meniscus instability is applied for estimating the characteristic frequency and amplitude of the cm responding acoustic emission signal. The estimated value of frequency (typically about 1 Hz in mild environmental conditions) lies far below the frequency band of commercial acoustic emission monitors, while the estimated wave amplitude (typically of the order 10-13 m) together with the broad spectral width indicate that corresponding signals are normally hidden in environmental and instrumental noise. This explains the absence of AE signals during the smooth development of crazes and at the same time leaves the mechanism of detectable acoustic emission in polymers to be explained on the grounds of cracking.

Ključne riječi

Hrčak ID:

331161

URI

https://hrcak.srce.hr/331161

Datum izdavanja:

6.4.1987.

Podaci na drugim jezicima: slovenski

Posjeta: 322 *