ISO INTERNATIONAL STANDARD 13445 Second edition 2003-04-01 AdhesivesDeterminationofshear strength of adhesive bonds between rigid substrates by the block-shear method Adhésifs-Determinationde laresistanceau cisaillementdejoints colles entreélements rigidesparlamethodedecisaillemententreblocs massifs Referencenumber ISO 13445:2003(E) ISO ii Contents Page Foreword 1 Scope 2 Normative references 3 Terms and definitions 4 Principle .... 5 Apparatus.. 6 Testspecimens 7 Conditioning... 8 Procedure 9 Expressionof results.. 10 Precision 11 Test report.. ili Foreword IsO (the International Organization for Standardization) is a worldwide federation of national standards bodies technical committees. Each member body interested in a subject for which a technical committee has been International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/lEC Directives, Part 2 The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. 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. ISO 13445 was preparedby Technical Committee ISO/TC 61, Plastics, Subcommittee SC 11,Products This second edition cancels and replaces the first edition (ISO 13445:1995), which has been technically revised. iv AdhesivesDeterminationofshearstrengthofadhesive bondsbetweenrigidsubstratesbytheblock-shearmethod Scope This International Standard specifies a method forthe determinationofthe shear strength of adhesives used to bond materials with elastic moduli higher than the elastic modulus of the adhesive. The method provides an 2Normative 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 Iso291:1997,Plastics-Standardatmospheresforconditioningandtesting Iso7500-1:—1),Metallic materials—Verification of static uniaxial testing machines-Part1:Tension/ compression testing machines-Verification and calibration of the force-measuring system Iso10365:1992,Adhesives—Designationofmainfailurepatterns EN13887:_2), Structural adhesives-Guidelines for surface preparation of metals and plastics prior to adhesivebonding 3Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 shear stress force applied parallel to a flat adhesive joint, divided by the bond area of the joint 3.2 shear strength 1)To be published. (Revision of ISO 7500-1:1999) 2) To be published, 1 4Principle magnet mouldings and plastic parts having one flat face where machining would be difficult or impractical. Apparatus 5.1 Tensile-testing machine, with a capacity of not less than 45 kN in tension. The machine shall conform to the requirements of ISO 7500-1. 5.2 approximating to these dimensions is shown in Figure 3a). For test specimens having two smaller adherends keep the shearing tool in its guides and to ensure the specimen is located under the clamp. O Figure1Specimen-holdingblock Figure 2—Shearing tool 2 a) Plastic, metal, ceramic orwood to glass b b d b)Plastic, metal, ceramic or wood to the same material orto one of the other materials Key 75mm±1mm a b 25mm±0,2 mm c 13 mm ± 1 mm p 12 mm<d±0,2 mm<13 mm e 6 mm for metals, 13 mm for others Figure3Typicalspecimensafterassembly Figure4Adapterforsmall specimensof thesizeshowninFigure3b) 6 Testspecimens 6.1 Adherend sizes shall be as follows: a) metal blocks: 25 mm × 25 mm × 6 mm; b) glass plates: 75 mm ×75mm ×13 mm; c) other materials: 25 mm × 25 mm × 13