1、SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirelyvoluntary, and its applicability and suitability for any particular use, including any patent infringement arising therefro
2、m, is the sole responsibility of the user.”SAE reviews each technical report at least every five years at which time it may be reaffirmed, revised, or cancelled. SAE invites your written comments and suggestions.QUESTIONS REGARDING THIS DOCUMENT: (724) 772-8512 FAX: (724) 776-0243TO PLACE A DOCUMENT
3、 ORDER; (724) 776-4970 FAX: (724) 776-0790SAE WEB ADDRESS http:/www.sae.orgCopyright 1985 Society of Automotive Engineers, Inc.All rights reserved. Printed in U.S.A.SURFACEVEHICLE400 Commonwealth Drive, Warrendale, PA 15096-0001RECOMMENDEDPRACTICEAn American National StandardJ1525ISSUEDJUN85Issued 1
4、985-06LAP SHEAR TEST FOR AUTOMOTIVE-TYPE ADHESIVES FOR FIBERREINFORCED PLASTIC (FRP) BONDINGForewordThis Document has not changed other than to put it into the new SAE Technical Standards BoardFormat.1. ScopeThis SAE Recommended Practice describes a lap shear test method for use in measuring thebond
5、ing characteristics of automotive-type adhesives for joining fiber reinforced plastics to themselves and tometals.2. References2.1 Applicable PublicationThe following publication forms a part of this specification to the extent specifiedherein.2.1.1 ASTM PUBLICATIONAvailable from ASTM, 100 Barr Harb
6、or Drive, West Conshohocken, PA 19428-2959.ASTMD1002Test Method for Strength Properties of Adhesives in Shear by Tension Loading (Metal-to-Metal)3. Test Substrate3.1 SubstratesFiber reinforced plastic as specified. Metal composition and roughness as specified.3.2 DimensionsFiber reinforced plastic p
7、arts shall be cut into flat coupons 25.4 x 100 mm (1.000 x 4.000 in) ata nominal thickness of 2.5 mm (0.100 in). In the case of FRP to metal bonding, metal thickness will benominally 1.5 mm (0.060 in).3.3 Surface PreparationSurface preparation of FRP will be in accordance with adhesive suppliersreco
8、mmendations. Surface roughening solvent cleaning and surface primers are acceptable provided they donot reduce FRP bulk properties. Any surface preparation must be adaptable to actual production situations.Metals will be machined to eliminate burrs or bevels. They will be clean and dry, or surface t
9、reated prior tobonding according to procedures prescribed by the adhesive manufacturer.COPYRIGHT Society of Automotive Engineers, Inc.Licensed by Information Handling ServicesSAE J1525 Issued JUN85-2-4. Preparation of Test Joints4.1 Application of AdhesiveAdhesive will be applied in accordance with
10、adhesive suppliers recommendations.In the case of two-part adhesives, mixing will be in accordance with suppliers suggested procedures.4.2 Adhesive CureAdhesive will be cured at room temperature or elevated temperature using prescribedconditions determined by adhesive supplier, provided they can be
11、reasonably adapted to production situations.FIGURE 1FIGURE 2FIGURE 34.3 Joint GeometryJoint geometry will be as shown in Figure 1. Joint geometry will be controlled by appropriatefixturing using glass beads or other suitable means to control a 0.76 mm (0.030 in) adhesive glueline thickness.The amoun
12、t of glass beads in the glueline will be the minimum number needed to hold glueline thickness.Fixturing pressure will be allowed.4.4 Excess AdhesiveExcess adhesive (squeeze out) will be removed from bonded lap shear prior to testing.COPYRIGHT Society of Automotive Engineers, Inc.Licensed by Informat
13、ion Handling ServicesSAE J1525 Issued JUN85-3-4.5 ConditioningBonded parts will be allowed to return to ambient temperature for at least 1 h if elevatedtemperature cures are employed. If adhesive is room temperature cured, full cure time plus 10% will beallowed prior to testing.5. Testing5.1 Apparat
14、usThe testing machine shall conform to the requirements of and have the capabilities of themachine prescribed in ASTM D1002.It shall have a suitable pair of grips to hold test samples without allowing slip. Initial grip separation shall be100 mm (4.000 in) with 25 mm (1.000 in) minimum of each sampl
15、e and firmly held.5.2 Test RateFixture loading shall be in a consistent manner with a rate of 13 mm (0.5000)/min preferred.5.3 Test SamplesFive lap shear samples will be prepared in each case and tested.6. Report6.1 Complete identification of the adhesive tested, including type and manufacturers cod
16、e number.6.2 Complete identification of the substrates used and method of surface preparation prior to bonding.6.3 Cure schedule, time, and temperature for bonding sample.6.4 Individual peak load values (psi or kPa), averages, and failure modes with estimated percentages.Failure mode will be reporte
17、d as shown in Figure 2. Close visual observation will be used to determine failuremode.If primers are employed, the failure modes shown in Figure 3 will be included.PREPARED BY THE SAE NONMETALLIC MATERIALS COMMITTEECOPYRIGHT Society of Automotive Engineers, Inc.Licensed by Information Handling Serv
18、icesSAE J1525 Issued JUN85RationaleNot applicable.Relationship of SAE Standard to ISO StandardNot applicable.ApplicationThis SAE Recommended Practice describes a lap shear test method for use in measuring thebonding characteristics of automotive-type adhesives for joining fiber reinforced plastics to themselvesand to metals.Reference SectionASTMD1002Test Method for Strength Properties of Adhesives in Shear by Tension Loading (Metal-to-Metal)Developed by the SAE Nonmetallic Materials CommitteeCOPYRIGHT Society of Automotive Engineers, Inc.Licensed by Information Handling Services
