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RESEARCH PAPERS

Acoustic Emission Monitoring During Rupture Test of Pressure Vessel and Laboratory Fracture Test

[+] Author and Article Information
N. Ohtsuka

Material and Welding Technology Department, Chiyoda Chemical Engineering & Construction Co., Ltd., Kawasaki-ku, Kawasaki 210, Japan

M. Nakano, H. Ueyama

Civil and Applied Mechanics Research Department, Chiyoda Chemical Engineering & Construction Co., Ltd., Kawasaki-ku, Kawasaki 210, Japan

J. Pressure Vessel Technol 103(2), 191-199 (May 01, 1981) (9 pages) doi:10.1115/1.3263386 History: Received February 09, 1980; Online November 05, 2009

Abstract

In order to relate the results of a field AE test on a large structure to observations made from small laboratory specimens, acoustic emission (AE) was monitored during a pressurization test on a model vessel containing several kinds of artificial defects and during laboratory tests on small specimens to simulate the defects. The active AE sources in the vessel were concentrated mainly around an artificial weld crack and a sawcut notch. The total number of AE events is compared with displacement, load, crack tip opening displacement, and AE signal amplitude under various test conditions on two types of defects. The significant difference in AE generating mechanism, size of defects, loading parameter and rate between the tests is discussed by the fracture mechanics approach.

Copyright © 1981 by ASME
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