1、Designation:D8067/D8067M17Standard Test Method forIn-Plane Shear Properties of Sandwich Panels Using aPicture Frame Fixture1This standard is issued under the fixed designation D8067/D8067M;the number immediately following the designation indicates theyear of original adoption or,in the case of revis
2、ion,the year of last revision.A number in parentheses indicates the year of lastreapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method covers determination of apparentin-plane shear strength and stiffness properties of flat s
3、andwichconstructions with composite face sheets.Permissible corematerial forms include those with continuous bonding surfaces(such as balsa wood and foams)as well as those withdiscontinuous bonding surfaces(such as honeycomb).1.2 The square test specimen with corner notches is me-chanically fastened
4、 to a pinned metal frame along each edge.The frame is loaded in uni-axial tension which produces tensileforces in the frame elements at a 45 angle to the appliedtension.These tensile forces act along the edges of thespecimen to cause a state of predominately shear stress totransfer the applied force
5、 through the specimen.Procedure Auses a specimen without edge doublers;Procedure B uses aspecimen with four discrete edge doublers;Procedure C uses aspecimen with a continuous edge doubler.1.3 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard.The value
6、s stated ineach system may not be exact equivalents;therefore,eachsystem shall be used independently of the other.Combiningvalues from the two systems may result in non-conformancewith the standard.1.3.1 Within the text the inch-pound units are shown inbrackets.1.4 This standard does not purport to
7、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:2D883 Terminolo
8、gy Relating to PlasticsD3878 Terminology for Composite MaterialsD5229/D5229M Test Method for MoistureAbsorption Prop-erties and Equilibrium Conditioning of Polymer MatrixComposite MaterialsE4 Practices for Force Verification of Testing MachinesE6 Terminology Relating to Methods of Mechanical Testing
9、E177 Practice for Use of the Terms Precision and Bias inASTM Test MethodsE251 Test Methods for Performance Characteristics of Me-tallic Bonded Resistance Strain GagesE456 Terminology Relating to Quality and Statistics3.Terminology3.1 DefinitionsTerminology D3878 defines terms relatingto high-modulus
10、 fibers and their composites,as well as termsrelating to sandwich constructions.Terminology D883 definesterms relating to plastics.Terminology E6 defines termsrelating to mechanical testing.Terminology E456 and PracticeE177 define terms relating to statistics.In the event of aconflict between terms,
11、Terminology D3878 shall have prece-dence over the other terminologies.3.2 Acronyms:3.2.1 CVcoefficient of variation statistic of a samplepopulation for a given property(in percent)3.2.2 Fsuface sheet ultimate shear stress3.2.3 Gfeffective face sheet chord shear modulus3.2.4 measured engineering shea
12、r strain in face sheet3.2.5 Llength of specimen between doubler edges3.2.6 nnumber of specimens3.2.7 Papplied force3.2.8 Pmaxmaximum force carried by test specimen beforefailure1This test method is under the jurisdiction of ASTM Committee D30 onComposite Materials and is the direct responsibility of
13、 Subcommittee D30.09 onSandwich Construction.Current edition approved Jan.1,2017.Published January 2017.DOI:10.1520/D806717.2For 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
14、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 StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in t
15、he Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 3.2.9 qrunning shear force per unit width along specimenedge3.2.10 Sn-1standard deviation statistic of a sample popu-l
16、ation for a given property3.2.11 face sheet shear stress3.2.12 tface sheet thickness3.2.13 x1test result for an individual specimen from thesample population for a given property3.2.14 x mean or average(estimate of mean)of a samplepopulation for a given property4.Summary of Test Method4.1 This test method consists of subjecting a square panel ofsandwich construction to a set of forces along the panel edgessuch that the applied force is transferred through the panel viaa state of predominately sh
