NASA-LLIS-0509

Lessons Learned - Velocities of Acoustic Emission Signals in a Thin-Walled Graphite/Epoxy Tube in Agreement with Classical Plate Theory

contributor author	NASA - National Aeronautics and Space Administration (NASA)
date accessioned	2017-09-04T17:59:48Z
date available	2017-09-04T17:59:48Z
date copyright	07/25/1994
date issued	1994
identifier other	FVBEQCAAAAAAAAAA.pdf
identifier uri	http://yse.yabesh.ir/std;jsery=autho162s7D8308/handle/yse/182871
description abstract	Description of Driving Event: Simulated acoustic emission signals were induced in a thin-walled graphite/epoxy tube by means of lead breaks (Hsu-Nielson Source). The tube is of similar material and layup to be used by NASA in fabricating the struts of space station freedom. The resulting waveforms were detected by broad band ultrasonic transducers and digitized. Measurements of the velocities of the extensional and flexural modes were made for propagation directions along the tube axis (0 degrees), around the tube circumference (90 degrees) and at an angle or 45 degrees. These velocities were found to be in agreement with classical plate theory.
language	English
title	NASA-LLIS-0509	num
title	Lessons Learned - Velocities of Acoustic Emission Signals in a Thin-Walled Graphite/Epoxy Tube in Agreement with Classical Plate Theory	en
type	standard
page	2
status	Active
tree	NASA - National Aeronautics and Space Administration (NASA):;1994
contenttype	fulltext
subject keywords	Research & Development