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ASTM E 1736 Document Information:
Title
Standard Practice for Acousto-Ultrasonic Assessment of Filament-Wound Pressure Vessels
ASTM International
Publication Date:
Jun 1, 2005
Scope:
This practice covers a procedure for acousto-ultrasonic (AU)
assessment of filament-wound pressure
vessels. Guidelines are given for the detection of defect states and
flaw populations that arise
during materials processing or manufacturing or upon exposure to
aggressive service environments.
Although this practice describes an automated scanning mode, similar
results can be obtained with a
manual scanning mode.
This procedure recommends technical details and rules for the reliable
and reproducible AU
detection of defect states and flaw populations. The AU procedure
described herein can be a basis
for assessing the serviceability of filament-wound pressure vessels.
The objective of the AU method is primarily the assessment of defect
states and diffuse flaw
populations that influence the mechanical strength and ultimate
reliability of filament-wound
pressure vessels. The AU approach and probe configuration are designed
specifically to determine
composite properties in lateral rather than through-the-thickness
directions.(Footnote 2)
The AU method is not for flaw detection in the conventional sense. The
AU method is most useful for
materials characterization, as explained in Guide E 1495, which gives
the rationale and basic
technology for the AU method. Flaws and discontinuities such as large
voids, disbonds, or extended
lack of contact of interfaces can be found by other nondestructive
examination (NDE) methods such
as immersion pulse-echo ultrasonics.
The values stated in SI units are to be regarded as the standard.
This standard does not purport to address all of the safety concerns,
if any, associated with its
use. It is the responsibility of the user of this standard to
establish appropriate safety and
health practices and determine the applicability of regulatory
limitations prior to use.
Footnote 2 - Vary, A., "Acousto-Ultrasonics," Nondestructive Testing
of Fibre-Reinforced Plastics
Composites, Vol 2, J. Summerscales, ed., Elsevier Science Publishers
Ltd., Barking, Essex, England,
1990, Chapter 1, pp. 1-54.
Keywords:
- acoustic emission
- acousto-ultrasonics
- fiber reinforced composites
- filament-wound pressure vessels
- nondestructive evaluation
- nondestructive testing
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