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Accession Number:
AD1003273
Title:
LWH and ACH Helmet Hardware Study
Corporate Author:
Naval Research Laboratory Washington United States
Report Date:
2015-11-30
Abstract:
NRL conducted a series of basic tests to characterize the properties of helmet screws and nuts used with the Light Weight Helmet LWHand Advanced Combat Helmet ACH. The testing included basic dimensional measurements, Rockwell hardness and Vickers microhardness measurements, metallographic examination of the grain microstructure, basic chemical composition, tensile strength, screwnut thread pull strength, and a drop-weight impact test. Information was obtained for sets of screws and nuts taken from LWH and ACH helmets that have previously passed acceptance tests. This information is used as reference values for a series of recommended tests that can be applied to new batches of helmets or replacement screws, to detect any significant changes in the helmet hardware characteristics that could indicate a change of the ballistic performance.
Descriptive Note:
Technical Report,18 Nov 2010,13 Jul 2015
Supplementary Note:
01 Jan 0001, 01 Jan 0001, NRL conducted a series of basic tests to characterize the properties of helmet screws and nuts used with the Light Weight Helmet (LWH)and Advanced Combat Helmet (ACH). The testing included basic dimensional measurements, Rockwell hardness and Vickers microhardnessmeasurements, metallographic examination of the grain microstructure, basic chemical composition, tensile strength, screw/nut thread pullstrength, and a drop-weight impact test. Information was obtained for sets of screws and nuts taken from LWH and ACH helmets that havepreviously passed acceptance tests. This information is used as reference values for a series of recommended tests that can be applied to newbatches of helmets or replacement screws, to detect any significant changes in the helmet hardware characteristics that could indicate a changeof the ballistic performance
Pages:
0029
Distribution Statement:
Approved For Public Release;
File Size:
1.71MB
