1、Designation:E278910(Reapproved 2015)Standard Guide forFretting Fatigue Testing1This standard is issued under the fixed designation E2789;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 parenthese
2、s indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This guide defines terminology and covers generalrequirements for conducting fretting fatigue tests and reportingthe results.It describes the general types of
3、fretting fatiguetests and provides some suggestions on developing and con-ducting fretting fatigue test programs.1.2 Fretting fatigue tests are designed to determine theeffects of mechanical and environmental parameters on thefretting fatigue behavior of metallic materials.This guide is notintended
4、to establish preference of one apparatus or specimendesign over others,but will establish guidelines for adherencein the design,calibration,and use of fretting fatigue apparatusand recommend the means to collect,record,and reporting ofthe data.1.3 The number of cycles to form a fretting fatigue crac
5、k isdependent on both the material of the fatigue specimen andfretting pad,the geometry of contact between the two,and themethod by which the loading and displacement are imposed.Similar to wear behavior of materials,it is important toconsider fretting fatigue as a system response,instead of amateri
6、al response.Because of this dependency on the configu-ration of the system,quantifiable comparisons of variousmaterial combinations should be based on tests using similarfretting fatigue configurations and material couples.1.4 This standard does not purport to address all of thesafety concerns,if an
7、y,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:2E3 Guide for Preparation of Metallographic SpecimensE
8、4 Practices for Force Verification of Testing MachinesE466 Practice for Conducting Force Controlled ConstantAmplitude Axial Fatigue Tests of Metallic MaterialsE467 Practice for Verification of Constant Amplitude Dy-namic Forces in an Axial Fatigue Testing SystemE468 Practice for Presentation of Cons
9、tant Amplitude Fa-tigue Test Results for Metallic MaterialsE1012 Practice for Verification of Testing Frame and Speci-men Alignment Under Tensile and Compressive AxialForce ApplicationE1823 Terminology Relating to Fatigue and Fracture TestingE1942 Guide for Evaluating Data Acquisition Systems Usedin
10、 Cyclic Fatigue and Fracture Mechanics TestingG15 Terminology Relating to Corrosion and Corrosion Test-ing(Withdrawn 2010)3G40 Terminology Relating to Wear and ErosionG190 Guide for Developing and Selecting Wear Tests3.Terminology3.1 Definitions and symbols used in this guide are inaccordance with T
11、erminology E1823.Relevant definitionsfrom Terminology G15 or G40 are provided in 3.2.Additionaldefinitions specific to this guide are provided in 3.3.3.2 Definitions:3.2.1 Terms from Terminologies G15 and G40.3.2.2 coeffcient of friction(COF)The dimensionless ratioof the tangential force,Q,between t
12、wo bodies to the normalforce,P,pressing these bodies together when the two bodies areslipping with respect to each other,=Q/P.3.2.2.1 DiscussionUnder partial slip conditions,the ratioof the tangential force to the normal force is less than the COF.In addition,when COF is defined as the ratio of Q to
13、 P,themeasured COF is an average along the interface.In reality,theCOF can vary along the interface.Hence,a local definition isoften used,given by(x,y)=q(x,y)/p(x,y)where q(x,y)is theshear traction distribution along the interface and p(x,y)is thenormal pressure distribution.The COF is often greater
14、 in theslip regions of a partial slip interface compared to the stickregions due to the disruptions in the surface caused by fretting.G401This guide is under the jurisdiction of ASTM Committee E08 on Fatigue andFracture and is the direct responsibility of Subcommittee E08.05 on CyclicDeformation and
15、 Fatigue Crack Formation.Current edition approved May 1,2015.Published August 2015.Originallyapproved in 2010.Last previous edition approved in 2010 as E278910.DOI:10.1520/E278910R15.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org
16、.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 3.2.3 frettingSmall amplitude oscillatory motion,usuallytangential,between two solid surfaces in contact.3.2.3.1 DiscussionThe term fretting refers only to thenature of the motion without r
