ISO 15107 pdf download.Adhesives — Determination of cleavage strength of bonded joints
1 Scope
This International Standard describes a method for the determination of the cleavage strength of adhesive joints. The method can only be used for comparing adhesives, and the results cannot be used for design purposes.
2 Normative references
The following standards contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. ISO 291 :1 997, Plastics — Standard atmospheres for conditioning and testing. ISO 4588:1 995, Adhesives — Guidelines for the surface preparation of metals. ISO 5893:1 993, Rubber and plastics test equipment — Tensile, flexural and compression types (constant rate of traverse) — Description. ISO 7500-1 :— 1 ) , Metallic materials — Verification of static uniaxial testing machines — Part 1 : Tensile/compression testing machines. ISO 91 42:1 990, Adhesives — Guide to the selection of standard laboratory ageing conditions for testing bonded joints. ISO 1 0365:1 992, Adhesives — Designation of main failure patterns. ISO 1 3895:1 996, Adhesives — Guidelines for the surface preparation of plastics.
3 Definition
For the purposes of this International Standard, the following definition applies: cleavage strength: The average force per unit width of the bond line required to produce progressive separation, by a wedge or other crack-opening-type action, of two adherends of sufficient thickness to preclude significant bending. It is expressed in newtons per millimetre of width.
4 Principle
A bonded specimen of specified dimensions is split along the line of cleavage by loading it in a tensile mode. The pins connecting the specimen to the tensile-testing machine are located eccentrically with respect to the centre of the bonded area. The loading induces a mode 1 fracture. NOTE — A definition of mode 1 fracture is given in ASTM E 1 823:1 996, Terminology relating to fatigue and fracture testing .
5 Apparatus
5.1 Tensile-testing machine, capable of maintaining a pre-determined constant crosshead rate. The machine shall be capable of determining a maximum load. The measured strength shall lie between 1 5 % and 85 % of the full-scale capacity of the load-measuring device. The machine shall permit the measurement and recording of the applied force with an accuracy of ± 1 %. The equipment shall be calibrated regularly in accordance with ISO 7500-1 in the case of metal adherends, or with ISO 5893 in the case of rubber or plastic adherends. NOTE — It is recommended that the machine be autographic, giving a chart that can be read in terms of millimetres of crosshead movement as one coordinate and applied force as the other coordinate. It is also recommended that inertialess equipment be used. 5.2 Specimen-holding fixture, designed to adjust automatically to ensure vertical loading of the bonded joint. An example of a suitable fixture is shown in figure 1 . 5.3 Connecting links, designed to hold the specimen between the fixed and moving heads of the tensile-testing machine. They shall be of the self-aligning type. The connecting links shall be attached to the fixed and moving heads and to the specimen in such a way that they will move into alignment as soon as a load is applied, and so that the long axis of the specimen will coincide with the direction of the applied load.
6 Specimens
6.1 Adherend material The adherends shall be made of metal, rigid plastic, rigid fibre-reinforced plastic, wood or wood-based material. 6.2 Shape and dimensions Specimens shall be as shown in figure 2. 6.3 Cleaning and surface treatment of adherends The cleaning and surface treatment of the adherends shall be in accordance with the instructions of the adherend manufacturer and/or adhesive manufacturer, and/or shall be chosen from the methods described in ISO 4588 in the case of metals or ISO 1 3895 in the case of plastics.