ISO 19095-5:2023

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2022-07-05
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ISO/FDISDISFDIS 19095-5:2022(E)
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ISO/TC 61/SC 11/WG 5
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2022-11-08
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Secretariat:  JISC
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Plastics — Evaluation of the adhesion interface performance in plastic-metal Latin and Asian text, Adjust space between Asian text and
numbers
assemblies — Part 5: Fracture energy
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Plastiques — Évaluation des performances de l'interface d'adhérence dans les Formatted: Adjust space between Latin and Asian text,
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assemblages plastique-métal — Partie 5: Titre manque

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ISO 19095-5:2022(E)Error! Reference source not found.
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ISO Copyright Office
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Published in Switzerland.
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ii © ISO 2022 – All rights reserved

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Contents Page
Foreword 3
Introduction 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Test specimens . 6
4.1 Shape and size . 6
4.2 Procedure for building test specimens. 7
5 Test procedure . 9
5.1 Test machine . 9
5.2 Loading rigs . 9
5.3 Displacement measurement . 10
5.4 Length, width and crack length of test specimens . 11
5.5 Conditioning . 11
5.6 Test procedure . 11
6 Expression of results . 12
7 Test report . 13
Bibliography . 15
Foreword 3
Introduction 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Test specimens . 6
4.1 Shape and size . 6
4.2 Procedure for building test specimens. 7
5 Test procedure . 9
© ISO 2022 – All rights reserved iii

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5.1 Test machine . 9
5.2 Loading rigs . 9
5.3 Displacement measurement . 10
5.4 Length, width and crack length of test specimens . 11
5.5 Conditioning . 11
5.6 Test procedure . 11
6 Expression of results . 12
7 Test report . 13
Bibliography . 15

iv © ISO 2022 – All rights reserved

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ISO 19095-5:2022(E)Error! Reference source not found.
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Foreword
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ISO (the International Organization for Standardization) is a worldwide federation of national standards Formatted: English (United Kingdom)
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
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through ISO technical committees. Each member body interested in a subject for which a technical text, Don't adjust space between Asian text and numbers
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. Formatted: English (United Kingdom)
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/directiveswww.iso.org/directives). Formatted: English (United Kingdom)
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/patentswww.iso.org/patents). Formatted: English (United Kingdom)
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement. Formatted: English (United Kingdom)
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the World
Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see
www.iso.org/iso/foreword.htmlwww.iso.org/iso/foreword.html. Formatted: English (United Kingdom)
This document was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 11, Products. Formatted: English (United Kingdom)
A list of all parts in the ISO 19095 series can be found on the ISO website. Formatted: Default Paragraph Font
Any feedback or questions on this document should be directed to the user’s national standards body. A Formatted: English (United Kingdom)
complete listing of these bodies can be found at
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www.iso.org/members.htmlwww.iso.org/members.html.
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© ISO 2022 – All rights reserved v

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Introduction
There is a growing demand for reliability of metal-plastic joints to make lightweight cars and aircraft,
which leads to fuel savings and reduced carbon dioxide emissions. Dissimilar joints of plastics and metals
is also an important technology for manufacturing high-performance, low-cost electronic components.
Against this background of industrial trends, new bonding technologies are being developed and test
methods for assessing the joint performance of metal-plastic assemblies manufactured in various
bonding processes need to be standardized.
ISO 19095-1 through ISO 19095-4 were developed for the metal-plastic assemblies to assess the joint Formatted: std_docPartNumber
strength, sealing properties and environmental durability.
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This document provides a test method to evaluate metal-plastic interfacial fracture energy and to Formatted: std_docPartNumber
characterize the failure behaviour of joints. This test is therefore useful for qualifying a joint’s ability to
resist fracture in order to ensure joint integrity.
vi © ISO 2022 – All rights reserved

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INTERNATIONAL STANDARD ISO/FDIS 19095-5:2022(E)

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Plastics — Evaluation of the adhesion interface performance
in plastic-metal assemblies — Part 5: Fracture energy
© ISO 2022 – All rights reserved 1

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Plastics — Evaluation of the adhesion interface performance
in plastic-metal assemblies — Part 5: Fracture energy
SAFETY STATEMENT — Persons using this document should be familiar with normal laboratory practice, Formatted: Adjust space between Latin and Asian text,
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if applicable. This document 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. It is
recognized that some of the materials permitted in this document 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.
1 Scope
This document specifies a method of testing the adhesion in plastic-metal joints produced by several
techniques: adhesive bonding, direct joining of thermoplastics by injection or compression moulding, or
other methods. More specifically this testing method provides a measure of the joint resistance to fracture
in the region between plastic and metal adherends.
This method can only be used for comparing adhesives, surface treatments, bonding conditions and
effects of environmental conditions. The results cannot be used for engineering design purposes.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 291, Plastics — Standard atmospheres for conditioning and testing
ISO 5893, Rubber and plastics test equipment — Tensile, flexural and compression types (constant rate of
traverse) — Specification
ISO 10365, Adhesives — Designation of main failure patterns
ISO 17212, Structural adhesives — Guidelines for the surface preparation of metals and plastics prior to
adhesive bonding
ISO 10365, Adhesives — Designation of main failure patterns
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obphttps://www.iso.org/obp
— IEC Electropedia: available at https://www.electropedia.org/https://www.electropedia.org/
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pt + 59.55 pt + 79.4 pt + 99.25 pt + 119.05 pt + 138.9
3.1
pt + 158.75 pt + 178.6 pt + 198.45 pt
energy to initiate fracture
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W Formatted: Font: Not Bold
F
total input energy needed to bring the test specimen up to fracture initiation
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Note 1 to entry: It is expressed in joules, J.
Note 2 to entry: WF is determined from the load-displacement curve recorded during the test, by integration, as
specified in Clause 6.
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fracture energy
wF Formatted: Font: Not Bold
energy per unit width of the joining area (e )
1
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w = W /e Formatted: Font: Italic
F F 1
Note 1 to entry: It is expressed in joules per metre, J/m.
3.3
precrack
non-adhering part of the adjacent faces the two adherends of the joint, acting as a crack initiator
3.4
precrack length
a1
length of the precrack (3.3) in the longitudinal direction of the joint Formatted: Font: Italic
Note 1 to entry: As specified in Figure 1.
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+ 59.55 pt, Left + 79.4 pt, Left + 99.25 pt, Left + 119.05
pt, Left + 138.9 pt, Left + 158.75 pt, Left + 178.6 pt, Left
Note 2 to entry: It is expressed in metres, m.
+ 198.45 pt, Left
3.5
‘nominal crack’ length (before fracture)
a
distance from the load line (i.e. the line through the centres of the holes for the insertion of the loading
pins) to the tip of the precrack (3.3)
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Note 1 to entry: As specified in Figure 2.
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+ 59.55 pt, Left + 79.4 pt, Left + 99.25 pt, Left + 119.05
pt, Left + 138.9 pt, Left + 158.75 pt, Left + 178.6 pt, Left
Note 2 to entry: lt is expressed in metres, m.
+ 198.45 pt, Left
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4 Test specimens
4.1 Shape and size
Test specimens shall be prepared according to Figure 1. Metal and plastic plates having a thickness of
2,0 mm ± ± 0,1 mm, length w and width e , are joined in such a way as to leave a part of the two plates
1
on one side of the laminate (hatched area in Figure 1, top) not bonded. This part will serve as a precrack,
with length a . Specimen dimensions are as specified in Figure 1.
1
To apply the load to the test specimen, load blocks are tightly bonded to both sides of the plastic-metal
laminate in accordance with the geometry as specified in Figure 2.
The length, a, of the ‘nominal crack’ should preferably be in the range 0,45 < a/W < 0,55, and the specimen
width, e1, is preferably equal to W/2.
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Dimensions in millimetres

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e w a
1 1
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Not at 19.85 pt + 39.7 pt + 59.55 pt + 79.4 pt + 99.25
12,5 ± 0,2 17,5 ± 0,2 5,0 ± 0,1
pt + 119.05 pt + 138.9 pt + 158.75 pt + 178.6 pt +
Key
198.45 pt
a1 precrack length
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e1 width of the joining area
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w length of the metal and plastic plates
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b1 meta
...