ISO 19095-4:2015

INTERNATIONAL ISO
STANDARD 19095-4
First edition
2015-08-01
Plastics — Evaluation of the adhesion
interface performance in plastic-metal
assemblies —
Part 4:
Environmental conditions for
durability
Plastiques — Évaluation des performances de l’interface d’adhérence
dans les assemblages plastique-métal —
Partie 4: Conditions environnementales pour la durabilité
Reference number
©
ISO 2015
© ISO 2015, Published in Switzerland
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ii © ISO 2015 – All rights reserved

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Test specimen . 4
4.1 Form of test specimen. 4
4.2 Condition of test specimen . 4
5 Test procedure . 4
5.1 Temperature dependence test . 4
5.1.1 Apparatus . 4
5.1.2 Test procedure . 5
5.1.3 Presentation of result . 5
5.2 Thermal shock test . 5
5.2.1 Apparatus . 5
5.2.2 Test procedure . 5
5.2.3 Presentation of result . 6
5.3 Temperature/Humidity cyclic test . 6
5.3.1 Apparatus . 6
5.3.2 Test procedure . 6
5.3.3 Presentation of result . 7
5.4 High temperature and high humidity test . 7
5.4.1 Apparatus . 7
5.4.2 Test procedure . 7
5.4.3 Presentation of result . 8
5.5 Salt mist test . 8
5.5.1 Apparatus . 8
5.5.2 Test procedure . 8
5.5.3 Presentation of result . 8
5.6 Fatigue test . 8
5.6.1 Principle . 8
5.6.2 General conditions . 8
5.6.3 Apparatus . 8
5.6.4 Test procedure . 9
5.7 Report . 9
Annex A (normative) Staircase method (or Dixon and Mood’s method ) .10
Annex B (normative) Data reclassification method .12
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
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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
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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
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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 61, Plastics, Subcommittee SC 11, Products.
ISO 19095 consists of the following parts, under the general title Plastics — Evaluation of the adhesion
interface performance in plastic-metal assemblies:
—Part 1: Guidelines for the approach
—Part 2: Test specimens
—Part 3: Test methods
—Part 4: Environmental conditions for durability
iv © ISO 2015 – All rights reserved

Introduction
Structures of heterogeneous materials are being manufactured in the automobiles and aerospace
industry sectors where higher safety margins are required.
The existing test methods are not appropriate because the evaluation of the adhesive interface is
difficult as the polymer material has a relatively low mechanical strength and therefore fractures
outside the joints. Therefore, it is necessary to develop a methodology for the evaluation of the adhesive
interfaces.
A test method to evaluate accurately the adhesion interface performance or standardization of long-
term evaluation under harsh environments is also necessary.
The method in ISO 19095 is intended to ensure that the integrity of the joint is realized through the
interface and that traceability of the value improves the data comparison.
This part of ISO 19095 defines the conditions to evaluate the long-term durability.
INTERNATIONAL STANDARD ISO 19095-4:2015(E)
Plastics — Evaluation of the adhesion interface
performance in plastic-metal assemblies —
Part 4:
Environmental conditions for durability
SAFETY STATEMENT — Persons using this part of ISO 19095 should be familiar with normal
laboratory practice, if applicable. This part of ISO 19095 does not purport to address all of the
safety problems, if any, associated with its use. It is the responsibility of the user to establish
appropriate safety and health practices and to ensure compliance with any regulatory
conditions. It is recognized that some of the materials permitted in this part of ISO 19095 might
have a negative environmental impact. As technological advances lead to more acceptable
alternatives for such materials, they will be eliminated to the greatest extent possible. At the end
of the test, care should be taken to dispose of all waste in an appropriate manner in accordance
with local regulations.
1 Scope
This part of ISO 19095 specifies the environmental conditions to evaluate the durability for the adhesion
interface performance in plastic-metal assemblies.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
ISO 472, Plastics — Vocabulary
ISO 19095-1:2015, Plastics — Evaluation of the adhesion interface performance in plastic-metal
assemblies —Part 1: Guideline for the approach
ISO 19095-2, Plastics — Evaluation of the adhesion interface performance in plastic-metal assemblies —
Part 2: Test specimens
ISO 19095-3, Plastics — Evaluation of the adhesion interface performance in plastic-metal assemblies —
Part 3: Test methods
IEC 60068-2-11, Basic environmental testing procedures — Part 2-11: Tests — Test Ka: Salt mist
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 472 and the following apply.
3.1
shear stress
τ
stress determined by dividing the force by the bonded surface area
Note 1 to entry: It is expressed in megapascals (MPa).
3.2
static shear stress
τ
R
average static shear stress at rupture as determined by ISO 4587
Note 1 to entry: It is expressed in megapascals (MPa).
3.3
stress cycle
smallest part of the stress/time function which is repeated at regular intervals
Note 1 to entry: It is of sinusoidal form (see Figure 1) with undulating shear.
Note 2 to entry: Cyclic stress can be considered to be the superposition of an alternating stress on a static stress
which is the mean stress.
Figure 1 — Fatigue stress cycle
3.4
maximum stress
τ
max
greatest algebraic value reached at regular intervals by the stress
Note 1 to entry: It is expressed in megapascals (MPa).
3.5
minimum stress
τ
min
smallest algebraic value reached at regular intervals by the stress
Note 1 to entry: This stress shall always be positive and is expressed in megapascals (MPa).
3.6
mean stress
τ
m
algebraic mean of the maximum and minimum stresses
Note 1 to entry: It is expressed as:
2 © ISO 2015 – All rights reserved

ττ+
max min
τ =
m
3.7
stress amplitude
τ
a
alternating stress equal to half the algebraic difference between the maximum and
minimum stresses
Note 1 to entry:
...