ASTM_F_2220_-_15.pdf

Designation:F222015An American National StandardStandard Specification forHeadforms1This standard is issued under the fixed designation F2220;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.INTRODUCTIONThis specification identifies the headforms used for testing protective headgear in individualASTMInternational test methods and performance standards(standard specifications).This specification wasclosely based on ISO DIS 6220,which was never published as an International Standard and is nolonger available.EN 960,a published standard,is also based on ISO DIS 6220 and has been used asa basis for this standard.1.Scope1.1 This standard specifies the materials,sizing,and manu-facturing details of test headforms for use in the testing ofprotective headgear.Details of the exterior dimension of theheadforms are included.1.2 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.2.Referenced Documents2.1 ASTM Standards:2B92/B92M Specification for Unalloyed Magnesium Ingotand Stick For Remelting2.2 Other Standards:EN 960 Headforms for Use in the Testing of ProtectiveHelmets3.Terminology3.1 Definitions:3.1.1 basic plane,nan anatomical plane that includes thesuperior rim of the external auditory meatuses(upper edge ofthe external openings of the ear)and the inferior margin of theorbit(the lowest point of the floor of the eye socket)(see Figs.1 and 2).3.1.2 coronal plane,nan anatomical plane perpendicularto both the basic and midsagittal planes and passing throughthe superior rims of the right and left external auditorymeatuses.The transverse plane corresponds to the coronalplane(see Figs.1 and 2).3.1.3 impact headforms,nheadforms used for impacttesting of protective headgear.Impact headforms shall conformto the external dimension defined in this specification.Theseheadforms shall meet the material,dimensions,mass,andcenter of gravity requirements of this specification.Theseheadforms shall include surface markings corresponding to thebasic,coronal,midsagittal,and reference planes.3.1.4 midsagittal plane,nan anatomical plane perpendicu-lar to the basic plane and containing the midpoint of the lineconnecting the notches of the right and left inferior orbitalridges and the midpoint of the line connecting the superior rimsof the right and left external auditory meatuses(see Figs.1 and2).3.1.5 other(reference)headforms,nheadforms used forother testing,other than impact,of protective headgear.Theyshall conform to the external dimension requirements of eachparticular headform size,as specified in this specification.Reference headforms shall be made of material of sufficientstrength and stiffness to maintain their geometry during testing.Full-chin headforms will be used as necessary.Referenceheadforms shall include surface markings corresponding to thebasic,coronal,midsagittal,and reference planes.3.1.6 reference plane,na plane marked on the headformsat a specified distance above and parallel to the basic plane(seeFig.2).4.Classification4.1 This specification identifies the requirements for six testheadform sizes:F2220-A,F2220-C,F2220-E,F2220-J,F2220-M,and F2220-O.1This specification is under the jurisdiction of ASTM Committee F08 on SportsEquipment,Playing Surfaces,and Facilities and is the direct responsibility ofSubcommittee F08.53 on Headgear and Helmets.Current edition approved June 1,2015.Published August 2015.Originallyapproved in 2002.Last previous edition approved in 2014 as F2220 14.DOI:10.1520/F2220-15.2For 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 5.Dimensions5.1 Datum LevelsAll datum levels are quoted relative tothe reference plane(“0”level)and are given in mm.5.2 DimensionsThe external dimensions that the head-forms must conform to are identified in Annex A1.Thesegment lengths from the intersection of the coronal plane,midsagittal plane and the reference plane of the test headformto the intersection of a horizontal angle and a point at eachdatum level above the reference plane are given.The exactgeometry of the external surface may be determined by a splinefunction or other curve fitting algorithm in order to produce asmooth and continuous outer headform surface.The headformsshall be symmetrical about the midsagittal plane.Internalgeometry may be defined to satisfy the requirements of theindividual test specifications.The resulting headform must stillcomply with the other requirements of this specification.6.Impact Head