EN 1465:2009 – Adhesives – Determination of tensile lap-shear strength of bonded assemblies

EN 1465:2009 - Adhesives - Determination of tensile lap-shear strength of bonded assemblies

1 Scope
This European Standard specifies a method for determining the tensile lap-shear strength of bonded assemblies when tested on a standard specimen and under specified conditions of preparation and testing.
NOTE 1 This test procedure is not applicable for calculations needed for bond design in structural joints.
NOTE 2 This test
Test methods for the determination of tensile lap-shear strength of bonded assemblies with wood adhesives are also specified in EN 205 and EN 302-1
2 Normative references
The following referenced documents are indispensable for the application 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.
EN 13887, Structural Adhesives – Guidelines for surface preparation of metals and plastics prior to adhesive bonding
EN ISO 291, Plastics – Standard atmospheres for conditioning and testing (ISO 291:2005)
EN ISO 527-1, Plastics – Determination of tensile properties – Part 1: General principles (ISO 527-1:1993 including Corr 1:1994)
EN ISO 10365, Adhesives – Designation of main failure patterns (ISO 10365:1992)
3 Principle
Adhesive lap-shear bond strength is determined by stressing in shear of a single overlap joint (see Figure 1) between rigid adherends by applying to the adherends a tensile force which is parallel to the bond area and to the major axis of the specimen. The reported result is the observed force or stress at rupture.
4 Apparatus
4.1 Testing machine
It shall comply with a test machine, class 1 and the response time of the machine shall be short enough not to affect the accuracy with which the force applied at the time of rupture can be measured.
NOTE The recorded force shall not differ from the true applied force by more than 1%. The machine shall be capable of applying a tensile force that increases at a steady rate. Where equipment does not allow for constant rate of load application, a rate of jaw separation shall be used which approximates the rate of loading (see EN ISO 527-1). It shall be provided with a suitable pair of self-aligning grips to hold the specimen. The grips and attachments shall be so constructed that they will move into alignment with the test specimen as soon as the load is applied, so that the long axis of the test specimen will coincide with the direction of the applied force through the centre line of the grip assembly to avoid bending moment. Grips that operate by bolting through the adherends shall be avoided since such grips give rise to undesirable stress concentration.
EN 1465:2009 – Adhesives – Determination of tensile lap-shear strength of bonded assemblies

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