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ASTM E3068-17

(Test Method)

Standard Test Method for Contact Measurement of Backface Deformation in Clay Backing During Body Armor Testing

Standard Test Method for Contact Measurement of Backface Deformation in Clay Backing During Body Armor Testing

SIGNIFICANCE AND USE
5.1 U.S. Department of Defense and U.S. Department of Justice standards for assessing the performance of ballistic-resistant torso body armor require the measurement of BFD on backing assemblies made with ROMA Plastilina No. 1®.  
5.2 This test method may be applicable for certification testing or for research and development testing.
SCOPE
1.1 This test method describes test methods for the contact measurement of backface deformation (BFD) in clay backing caused by a test threat that produces a partial penetration in a body armor test item.  
1.2 This test method is applicable to testing of planar and nonplanar 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 achieve consistent measurements between laboratories and reduce differences that could result from using different measurement techniques.  
1.5 It is anticipated that this test method will be referenced by certifiers, purchasers, and other users in order to meet their specific needs.  
1.6 This test method does not specify BFD performance requirements for body armor. The performance requirements are included in other standards or specifications. The decision rules for determining conformance to specifications and the consideration of uncertainty are also included in other standards or specifications.  
1.7 Units—The values stated in SI units are to be regarded as standard. Where appropriate, mathematical conversions to non-SI units are provided in parentheses for informational purposes.  
1.8 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

General Information

Status
Historical
Publication Date
31-Jan-2017
Technical Committee
E54 - Homeland Security Applications
Drafting Committee
E54.04 - Public Safety Equipment
Current Stage
Ref Project

Relations

Replaced By
ASTM E3068-17e1 - Standard Test Method for Contact Measurement of Backface Deformation in Clay Backing During Body Armor Testing
Effective Date
01-Feb-2017
Referred By
ASTM E2771-11(2019) - Standard Terminology for Homeland Security Applications
Effective Date
01-Feb-2017
Referred By
ASTM E3107/E3107M-23 - Standard Test Method for Resistance to Penetration and Backface Deformation for Ballistic-resistant Torso Body Armor and Shoot Packs
Effective Date
01-Feb-2017

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ASTM E3068-17 - Standard Test Method for Contact Measurement of Backface Deformation in Clay Backing During Body Armor TestingASTM E3068-17 - Standard Test Method for Contact Measurement of Backface Deformation in Clay Backing During Body Armor Testing
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ASTM E3068-17 - Standard Test Method for Contact Measurement of Backface Deformation in Clay Backing During Body Armor Testing
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: E3068 − 17
Standard Test Method for
Contact Measurement of Backface Deformation in Clay
1
Backing During Body Armor Testing
This standard is issued under the fixed designation E3068; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 2. Referenced Documents
2
1.1 This test method describes test methods for the contact 2.1 ASTM Standards:
measurement of backface deformation (BFD) in clay backing E3004 Specification for Preparation and Verification of Clay
caused by a test threat that produces a partial penetration in a BlocksUsedinBallistic-ResistanceTestingofTorsoBody
body armor test item. Armor
E3005 Terminology for Body Armor
1.2 This test method is applicable to testing of planar and
2.2 Other Standards:
nonplanar soft armor and hard armor.
MIL-STD-3027 Department of Defense Test Method Stan-
1.3 This test method is not applicable to testing of helmets.
dard for Performance Requirements and Testing of Body
3
Armor
1.4 The purpose of this test method is to achieve consistent
4
NIJ Standard 0101.06 Ballistic Resistance of Body Armor
measurements between laboratories and reduce differences that
NationalResearchCouncil TestingofBodyArmorMaterials
could result from using different measurement techniques.
5
Phase III
1.5 It is anticipated that this test method will be referenced
by certifiers, purchasers, and other users in order to meet their
3. Terminology
specific needs.
3.1 The terms and definitions of Terminology E3005 apply
1.6 This test method does not specify BFD performance for the following terms: backface deformation, backing fixture,
requirements for body armor. The performance requirements
backing material, body armor, complete penetration, hard
are included in other standards or specifications. The decision armor, nonplanar, partial penetration, soft armor, test item,and
rules for determining conformance to specifications and the
test threat.
consideration of uncertainty are also included in other stan-
3.2 Definitions of Terms Specific to This Standard:
dards or specifications.
3.2.1 applique, n—backing material intended to fill the
1.7 Units—The values stated in SI units are to be regarded
space behind a nonplanar test item during testing or condition-
as standard. Where appropriate, mathematical conversions to
ing procedures.
non-SI units are provided in parentheses for informational
3.2.2 backface deformation (BFD), n—theindentationinthe
purposes.
backing material caused by a projectile impact on the test item
1.8 This standard does not purport to address all of the
during testing. E3005
safety concerns, if any, associated with its use. It is the 3.2.2.1 Discussion—See Fig. 1.
responsibility of the user of this standard to establish appro-
2
priate safety and health practices and determine the applica- For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
bility of regulatory limitations prior to use.
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
3
Available from IHS, 15 Inverness Way East, Englewood, CO 80112, http://
1
This test method is under the jurisdiction of ASTM Committee E54 on www.global.ihs.com.
4
Homeland Security Applications and is the direct responsibility of Subcommittee AvailablefromNationalInstituteofJustice(NIJ),8107thSt.,NW,Washington,
E54.04 on Personal Protective Equipment (PPE). DC 20531, http://nij.gov.
5
Current edition approved Feb. 1, 2017. Published March 2017. DOI: 10.1520/ Available from The NationalAcademies Press, 500 Fifth St., NW, Washington,
E3068-17. DC 20001, https://www.nap.edu.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
E3068 − 17
FIG. 1 Examples of Backface Deformation (Side View)
3.2.3 bridge gauge, n—an assembly used for measuring that 3.2.5 clay block, n—a type of backing assembly in which
®6
consists of a depth gauge and supports that rest on opposite the backing material is ROMA Plastilina No. 1 modeling
clay. E3004
sides of the backing fixture. E3004
3.2.5.1 Discussion—See Fig. 3 for a graphical representa-
3.2.3.1 Discussion—See Fig. 2 for a photograph of a bridge
tion of a clay block.
gauge.
3.2.6 depth gauge, n—instrument (for example, caliper)
3.2.4 check standard, n—stable, durable artifact that may be
used to measure the indentations in the backing material.
used for training, comparing among measuring instruments,
and checking instruments prior to and a
...

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