oSIST prEN ISO 18249:2025
(Main)Non-destructive testing - Acoustic emission testing - Specific methodology and general evaluation criteria for testing of fibre-reinforced polymers (ISO 18249:2015)
Non-destructive testing - Acoustic emission testing - Specific methodology and general evaluation criteria for testing of fibre-reinforced polymers (ISO 18249:2015)
This International Standard describes the general principles of acoustic emission testing (AT) of
materials, components, and structures made of fibre-reinforced polymers (FRP) with the aim of
— materials characterization,
— proof testing and manufacturing quality control,
— retesting and in-service testing, and
— health monitoring.
This International Standard has been designed to describe specific methodology to assess the integrity
of fibre-reinforced polymers (FRP), components, or structures or to identify critical zones of high
damage accumulation or damage growth under load (e.g. suitable instrumentation, typical sensor
arrangements, and location procedures).
It also describes available, generally applicable evaluation criteria for AT of FRP and outlines procedures
for establishing such evaluation criteria in case they are lacking.
This International Standard also presents formats for the presentation of acoustic emission test data
that allows the application of qualitative evaluation criteria, both online during testing and by post-test
analysis, and that simplify comparison of acoustic emission test results obtained from different test
sites and organizations.
NOTE The structural significance of the acoustic emission cannot in all cases definitely be assessed based on
AT evaluation criteria only but can require further testing and assessment (e.g. with other non-destructive test
methods or fracture mechanics calculations).
Zerstörungsfreie Prüfung - Schallemissionsprüfung - Spezifische Vorgehensweise und allgemeine Bewertungskriterien für die Prüfung faserverstärkter Polymere (ISO 18249:2015)
Essai non destructif - Essai de l'émission acoustique - Méthodologie spécifique et critères d'évaluation générale d'essai des polymères renforcés de fibre (ISO 18249:2015)
Neporušitvene preiskave - Preiskave z akustično emisijo - Posebna metodologija in splošna ocenjevalna merila za preiskave z vlakni ojačenih polimerov (ISO 18249:2015)
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
01-september-2025
Neporušitvene preiskave - Preiskave z akustično emisijo - Posebna metodologija
in splošna ocenjevalna merila za preiskave z vlakni ojačenih polimerov (ISO
18249:2015)
Non-destructive testing - Acoustic emission testing - Specific methodology and general
evaluation criteria for testing of fibre-reinforced polymers (ISO 18249:2015)
Zerstörungsfreie Prüfung - Schallemissionsprüfung - Spezifische Vorgehensweise und
allgemeine Bewertungskriterien für die Prüfung faserverstärkter Polymere (ISO
18249:2015)
Essai non destructif - Essai de l'émission acoustique - Méthodologie spécifique et
critères d'évaluation générale d'essai des polymères renforcés de fibre (ISO
18249:2015)
Ta slovenski standard je istoveten z: prEN ISO 18249
ICS:
19.100 Neporušitveno preskušanje Non-destructive testing
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
INTERNATIONAL ISO
STANDARD 18249
First edition
2015-05-01
Non-destructive testing — Acoustic
emission testing — Specific
methodology and general evaluation
criteria for testing of fibre-
reinforced polymers
Essai non destructif — Essai de l’émission acoustique —
Méthodologie spécifique et critères d’évaluation générale d’essai des
polymères renforcés de fibre
Reference number
ISO 18249:2015(E)
©
ISO 2015
ISO 18249:2015(E)
© ISO 2015
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Published in Switzerland
ii © ISO 2015 – All rights reserved
ISO 18249:2015(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Personnel qualification . 3
5 Acoustic emission sources and acoustic behaviour . 3
5.1 Acoustic emission source mechanisms . 3
5.2 Wave propagation and attenuation characterization . 3
5.3 Test temperature . 4
5.4 Source location . 4
5.5 Analysis of acoustic emission from fibre-reinforced polymers. 5
6 Instrumentation and monitoring guidelines . 5
6.1 Instrumentation . 5
6.2 Sensors . 6
6.3 Sensor location and spacing . 6
6.4 Sensor coupling and mounting . 6
6.5 Detection and evaluation threshold . 6
6.6 Application of load . 7
6.7 Graphs for real-time monitoring . 7
7 Specific methodology . 7
7.1 Size of component . 7
7.2 Testing of specimens . 8
7.3 Testing of components and structures . 8
7.3.1 Preliminary information . 8
7.3.2 Test preparation . 8
7.3.3 Load profiles . 9
7.3.4 Written test procedure .11
7.3.5 Evaluation criteria .12
7.3.6 Stop criteria .15
7.3.7 Health monitoring .16
8 Interpretation of acoustic emission test results/source mechanisms .16
9 Report .16
Bibliography .18
ISO 18249:2015(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any
patent rights identified during the development of the document will be in the Introduction and/or on
the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the meaning of ISO specific terms and expressions related to conformity
assessment, as well as information about ISO’s adherence to the WTO principles in the Technical Barriers
to Trade (TBT), see the following URL: Foreword — Supplementary information.
The committee responsible for this document is ISO/TC 135, Non-destructive testing, Subcommittee
SC 9, Acoustic emission testing.
iv © ISO 2015 – All rights reserved
ISO 18249:2015(E)
Introduction
The increasing use of fibre-reinforced polymer (FRP) materials in structural (e.g. aerospace, automotive,
civil engineering) and infrastructural applications (e.g. gas cylinders, storage tanks, pipelines) requires
respective developments in the field of non-destructive testing.
Because of its sensitivity to the typical damage mechanisms in FRP, acoustic emission testing (AT) is
uniquely suited as a test method for this class of materials.
It is already being used for load test monitoring (increasing test safety) and for proof-testing, periodic
testing and periodic or continuous, real-time monitoring (health monitoring) of pressure vessels,
storage tanks, and other safety-relevant FRP structures.
Acoustic emission testing shows potential where established non-destructive test methods
(e.g. ultrasonic testing or water-jacket tests) are not applicable (e.g. thick carbon-fibre reinforced gas
cylinders used for the storage and transport of compressed natural gas (CNG), gaseous hydrogen).
The general principles outlined in EN 13554 apply to all classes of materials but this International
Standard emphasizes applications to metallic components (see EN 13554:2011, Clause 6).
However, the properties of FRP relevant to AT testing are distinctly different from those of metals.
FRP structures are inherently non-homogeneous and show a certain degree of anisotropic behaviour,
depending on fibre orientation and stacking sequence of plies, respectively.
Material composition and properties, and geometry affect wave propagation, e.g. mode, velocity,
dispersion, and attenuation, and hence the AT signals recorded by the sensors.
Composites with a distinct viscoelastic polymer matrix (e.g. thermoplastics) possess a comparatively high
acoustic wave attenuation which is dependent on wave propagation parallel or perpendicular to the direction
of fibre orientation, plate wave mode, frequency, and temperature-dependent relaxation behaviour.
Therefore, successful AT of FRP materials, components, and structures requires a specific methodology
(e.g. storage of complete waveforms, specific sensors and sensor arrays, specific threshold settings,
suitable loading patterns, improved data analysis), different from that applied to metals.
There are recent developments in acoustic emission testing, e.g. modal AT (wave and wave mode analysis
in time and frequency domain) and pattern recognition analysis.
INTERNATIONAL STANDARD ISO 18249:2015(E)
Non-destructive testing — Acoustic emission testing —
Specific methodology and general evaluation criteria for
testing of fibre-reinforced polymers
1 Scope
This International Standard describes the general principles of acoustic emission testing (AT) of
materials, components, and structures made of fibre-reinforced polymers (FRP) with the aim of
— materials characterization,
— proof testing and manufacturing quality control,
— retesting and in-service testing, and
— health monitoring.
This International Standard has been designed to describe specific methodology to assess the integrity
of fibre-reinforced polymers (FRP), components, or structures or to identify critical zones of high
damage accumulation or damage growth under load (e.g. suitable instrumentation, typical sensor
arrangements, and location procedures).
It also describes available, generally applicable evaluation criteria for AT of FRP and outlines procedures
for establishing such evaluation criteria in case they are lacking.
This International Standard also presents formats for the presentation of acoustic emissi
...
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