ASTM E3068-2017 Standard Test Method for Contact Measurement of Backface Deformation in Clay Backing During Body Armor Testing《防弹衣测试过程中粘土衬背面变形接触测量的标准试验方法》.pdf
《ASTM E3068-2017 Standard Test Method for Contact Measurement of Backface Deformation in Clay Backing During Body Armor Testing《防弹衣测试过程中粘土衬背面变形接触测量的标准试验方法》.pdf》由会员分享,可在线阅读,更多相关《ASTM E3068-2017 Standard Test Method for Contact Measurement of Backface Deformation in Clay Backing During Body Armor Testing《防弹衣测试过程中粘土衬背面变形接触测量的标准试验方法》.pdf(5页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: E3068 17Standard Test Method forContact Measurement of Backface Deformation in ClayBacking During Body Armor Testing1This standard is issued under the fixed designation E3068; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revi
2、sion, 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 This test method describes test methods for the contactmeasurement of backface deformation (BFD) in
3、clay backingcaused by a test threat that produces a partial penetration in abody armor test item.1.2 This test method is applicable to testing of planar andnonplanar soft armor and hard armor.1.3 This test method is not applicable to testing of helmets.1.4 The purpose of this test method is to achie
4、ve consistentmeasurements between laboratories and reduce differences thatcould result from using different measurement techniques.1.5 It is anticipated that this test method will be referencedby certifiers, purchasers, and other users in order to meet theirspecific needs.1.6 This test method does n
5、ot specify BFD performancerequirements for body armor. The performance requirementsare included in other standards or specifications. The decisionrules for determining conformance to specifications and theconsideration of uncertainty are also included in other stan-dards or specifications.1.7 UnitsT
6、he values stated in SI units are to be regardedas standard. Where appropriate, mathematical conversions tonon-SI units are provided in parentheses for informationalpurposes.1.8 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibili
7、ty 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:2E3004 Specification for Preparation and Verification of ClayBlocks Used in Ballistic-Resistance Tes
8、ting of Torso BodyArmorE3005 Terminology for Body Armor2.2 Other Standards:MIL-STD-3027 Department of Defense Test Method Stan-dard for Performance Requirements and Testing of BodyArmor3NIJ Standard 0101.06 Ballistic Resistance of Body Armor4National Research Council Testing of BodyArmor MaterialsPh
9、ase III53. Terminology3.1 The terms and definitions of Terminology E3005 applyfor the following terms: backface deformation, backing fixture,backing material, body armor, complete penetration, hardarmor, nonplanar, partial penetration, soft armor, test item, andtest threat.3.2 Definitions of Terms S
10、pecific to This Standard:3.2.1 applique, nbacking material intended to fill thespace behind a nonplanar test item during testing or condition-ing procedures.3.2.2 backface deformation (BFD), nthe indentation in thebacking material caused by a projectile impact on the test itemduring testing. E30053.
11、2.2.1 DiscussionSee Fig. 1.1This test method is under the jurisdiction of ASTM Committee E54 onHomeland Security Applications and is the direct responsibility of SubcommitteeE54.04 on Personal Protective Equipment (PPE).Current edition approved Feb. 1, 2017. Published March 2017. DOI: 10.1520/E3068-
12、17.2For 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.3Available from IHS, 15 Inverness Way East, Englewood, CO
13、80112, http:/.4Available from National Institute of Justice (NIJ), 810 7th St., NW, Washington,DC 20531, http:/nij.gov.5Available from The National Academies Press, 500 Fifth St., NW, Washington,DC 20001, https:/www.nap.edu.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Consh
14、ohocken, PA 19428-2959. United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recommendations issued by the World Trade Org
15、anization Technical Barriers to Trade (TBT) Committee.13.2.3 bridge gauge, nan assembly used for measuring thatconsists of a depth gauge and supports that rest on oppositesides of the backing fixture. E30043.2.3.1 DiscussionSee Fig. 2 for a photograph of a bridgegauge.3.2.4 check standard, nstable,
16、durable artifact that may beused for training, comparing among measuring instruments,and checking instruments prior to and after calibration,maintenance, or normal use to detect changes in the instru-ments.3.2.5 clay block, na type of backing assembly in whichthe backing material is ROMA Plastilina
17、No. 16modelingclay. E30043.2.5.1 DiscussionSee Fig. 3 for a graphical representa-tion of a clay block.3.2.6 depth gauge, ninstrument (for example, caliper)used to measure the indentations in the backing material.6U.S. Government standards require ROMA Plastilina No. 1, from SculptureHouse, Inc., as
18、the backing material for ballistic-resistance testing.FIG. 1 Examples of Backface Deformation (Side View)FIG. 2 Photograph of Bridge GaugeE3068 1723.2.7 floating gauge, na depth gauge that rests on thesurface of the backing material.3.2.8 striking device, na device used on a clay block toestablish a
19、n appropriate, flat surface on the clay backingmaterial with respect to the backing fixture edges. E30044. Summary of Test Method4.1 Ballistic testing of body armor typically requires shoot-ing body armor test items mounted on clay blocks.4.2 One of the ballistic test methods for body armorspecifies
20、 that the BFD be measured when shooting of the testitem results in a partial penetration. When the shot results in acomplete penetration, BFD is not measured.4.3 This test method describes the measurementinstrumentation, the BFD measurand, and the procedure for theuse of contact measurement instrume
21、nts.5. Significance and Use5.1 U.S. Department of Defense and U.S. Department ofJustice standards for assessing the performance of ballistic-resistant torso body armor require the measurement of BFD onbacking assemblies made with ROMA Plastilina No. 1.5.2 This test method may be applicable for certi
22、ficationtesting or for research and development testing.6. Equipment and Instrumentation6.1 The measuring instrument shall have a resolution of0.01 mm (0.0004 in.) or better with an accuracy of 60.1 mm(0.004 in.) or better.6.2 Three types of contact measuring instruments may beused:6.2.1 Bridge Gaug
23、eThe bridge gauge shall be a rigidassembly that rests on two parallel strike face edges of thebacking fixture and supports a depth gauge that can slide backand forth on the assembly to measure depths across the surfaceof the backing material. The bridge shall be sufficiently rigidthat it will not de
24、flect during use or otherwise negatively affectthe measurement.6.2.2 Floating GaugeThe floating gauge shall be a rigidassembly that supports a depth gauge and has a base that restson the clay surface. The base shall be at least 25 by 152 mm (1by 6 in.) but not so large that it touches the backing fi
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