ASTM_D_1876_-_08_2015e1.pdf

Designation:D187608(Reapproved 2015)1Standard Test Method forPeel Resistance of Adhesives(T-Peel Test)1This standard is issued under the fixed designation D1876;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S.Department of Defense.1NOTESection 5.1 and Figure 1 were editorially corrected in May 2015.INTRODUCTIONThe accuracy of the results of strength tests of adhesive bonds will depend on the conditions underwhich the bonding process is carried out.Unless otherwise agreed upon by the manufacturer and thepurchaser,the bonding conditions shall be prescribed by the manufacturer of the adhesive.In order toensure that complete information is available to the individual conducting the tests,the manufacturerof the adhesive shall furnish numerical values and other specific information for each of the followingvariables:(1)Procedure for preparation of the surfaces prior to application of the adhesive,the cleaning anddrying of metal surfaces,and special surface treatments such as sanding,which are not specificallylimited by the pertinent test method.(2)Complete mixing directions for the adhesive.(3)Conditions for application of the adhesive,including the rate of spread or thickness of film,number of coats to be applied,whether to be applied to one or both surfaces,and the conditions ofdrying where more than one coat is required.(4)Assembly conditions before application of pressure,including the room temperature,length oftime,and whether open or closed assembly is to be used.(5)Curing conditions,including the amount of pressure to be applied,the length of time underpressure,and the temperature of the assembly when under pressure.It should be stated whether thistemperature is that of the glue line,or of the atmosphere at which the assembly is to be maintained.(6)Conditioning procedure before testing,unless a standard procedure is specified,including thelength of time,temperature,and relative humidity.Arange may be prescribed for any variable by the manufacturer of the adhesive,if it can be assumedby the test operator that any arbitrarily chosen value within such a range or any combination of suchvalues for several variables will be acceptable to both the manufacturer and the purchaser of theadhesive.1.Scope1.1 This test method is primarily intended for determiningthe relative peel resistance of adhesive bonds between flexibleadherends by means of a T-type specimen.1.2 The values stated in SI units are to be regarded as thestandard.The values given in parentheses are provided forinformation purposes only.1.3 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2B209 Specification for Aluminum and Aluminum-AlloySheet and Plate1This test method is under the jurisdiction of ASTM Committee D14 onAdhesives and is the direct responsibility of D14.80 on Metal Bonding Adhesives.Current edition approved April 1,2015.Published May 2015.Originallyapproved in 1961.Last previous edition approved in 2008 as D1876 08.DOI:10.1520/D1876-08R15E01.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 D907 Terminology of Adhesives3.Terminology3.1 Definitions:3.1.1 Many terms in this test method are defined in Termi-nology D907.3.1.2 peel strength,nthe average load per unit width ofbondline required to separate progressively a flexible memberfrom a rigid member or another flexible member.3.1.2.1 DiscussionFlexible has different meanings in dif-ferent peel tests,such as“T,”180-degree,floating-roller,orclimbing-drum.The angle between the members varies withthe type of peel test.3.2 Definitions of Terms Specific to This Standard:3.2.1 flexible,adjindicates that the adherends shall havesuch dimensions and physical properties as to permit bendingthem through any angle up to 90 without breaking or cracking.3.2.2 T-peel strength,nthe average load per unit width ofbond line required to produce progressive separation of twobonded,flexible adherends,under conditions designated in thistest method.4.Apparatus4.1 Tension Testing Machine,capable of applying a tensileload having the following prescribed conditions:4.1.1 The machine and loading range selected that themaximum load on the specimen falls between