ASTM_D_3332_-_99_2010.pdf

Designation:D333299(Reapproved 2010)Standard Test Methods forMechanical-Shock Fragility of Products,Using ShockMachines1This standard is issued under the fixed designation D3332;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.1.Scope1.1 These test methods cover determination of the shockfragility of products.This fragility information may be used indesigning shipping containers for transporting the products.Itmay also be used to improve product ruggedness.Unit orconsumer packages,which are transported within an outercontainer,are considered to be the product for the purposes ofthese test methods.Two test methods are outlined,as follows:1.1.1 Test Method A is used first,to determine the productscritical velocity change.1.1.2 Test Method B is used second,to determine theproducts critical acceleration.1.2 The values stated in inch-pound units are to be regardedas standard.The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.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.For specificprecautionary statements,see Section 6.2.Referenced Documents2.1 ASTM Standards:2D996 Terminology of Packaging and Distribution Environ-mentsD2463 Test Method for Drop Impact Resistance of Blow-Molded Thermoplastic ContainersD3580 Test Methods for Vibration(Vertical Linear Motion)Test of ProductsD4332 Practice for Conditioning Containers,Packages,orPackaging Components for TestingD5112 Test Method for Vibration(Horizontal Linear Mo-tion)Test of ProductsE122 Practice for Calculating Sample Size to Estimate,WithSpecified Precision,the Average for a Characteristic of aLot or ProcessE680 Test Method for Drop Weight Impact Sensitivity ofSolid-Phase Hazardous Materials3.Terminology3.1 DefinitionsGeneral definitions for packing and distri-bution are found in Terminology D996.3.2 Definitions of Terms Specific to This Standard:3.2.1 acceleration of gravity(g)386.1 in./s2(9.806 m/s2).3.2.2 critical acceleration(Ac)the maximum-faired accel-eration level for a minimum velocity change of 1.57 Vc(see9.3),above which product failure(or damage)occurs.Aproduct usually has a different critical acceleration for eachdirection in which it is tested.3.2.3 critical velocity change(Vc)the velocity change(see9.2)below which product failure is unaffected by shock-pulsemaximum-faired acceleration or waveform.A product usuallyhas a different critical velocity change for each direction inwhich it is tested.3.2.4 damageproduct failure that occurs during a shocktest.Damage can render the product unacceptable because itbecomes inoperable or fails to meet performance specificationswhen its appearance is unacceptably altered,or some combi-nation of these failure modes occurs.3.2.5 damage boundarySee Annex A3.3.2.6 fairingThe graphical smoothing of the amplitude ofa recorded pulse still containing high frequency componentseven though electronic filtering may have been performed.This amplitude is used to evaluate the basic recorded pulsefeatures with respect to the specified pulse.(see Figs.A1.1 andA2.1)3.2.7 shock pulse programmera device used to control theparameters of the acceleration versus time shock pulse gener-ated by a shock test machine.1These test methods are under the jurisdiction of ASTM Committee D10 onPackaging and are the direct responsibility of Subcommittee D10.13 on InteriorPackaging.Current edition approved Jan.1,2010.Published January 2010.Originallyapproved in 1988.Last previous edition approved in 2004 as D3332 99(2004).DOI:10.1520/D3332-99R10.2For 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 3.2.8 shock test machine drop heightthe distance throughwhich the carriage of the shock test machine falls beforestriking the shock pulse programmer.4.Significance and Use4.1 These test methods are intended to provide the user withdata on product shock fragility that can be used in choosingoptimum-cushioning materials for shipping containers or forproduct design modification.5.Apparatus5.1 Shock Test Machine:5.1.1 The machine shall consist of a flat horizontal testsurface(carriage)of sufficient strength and rigidity to remainflat and horizontal under the stresses developed during the test.The test surface shall