Bullet-proof Performance and Mechanism of New Ultra-high Molecular Weight Polyethylene Film

doi:10.3969/j.issn.1000-1093.2021.11.019

Abstract

Abstract: Ultra-high molecular weight polyethylene(UHMWPE) film is a new type of bullet-proof material that has appeared in recent years. It has the different structural characteristics from UHMWPE UD.1.1 g standard simulation fragments，Type 51 7.62 mm steel armored lead-core bullets and 9 mm Perabellum copper armored lead-core bullet are used to conduct shooting tests on two types of UHMWPE material laminated targets.The influences of the molecular weights，crystallinities，mechanical characteristics and ballistic efficiency coefficients of the two types of materials on their ballistic limit v₅₀ values，specific energy absorption value and depression depth are studied. Their bullet-proof performances are theoretically analyzed. And the bullet-proof mechanisms of the two types of materials are compared and studied from the morphology of the impact point. The results indicate that the molecular weights，crystallinities，tensile strengths，tensile moduli，and ballistic efficiency coefficients of the two types of materials are positively correlated with their bullet-proof performances，and a smaller elongation at break is more conducive to reducing the depression depth.Analysis of the bullet-proof mechanism found that the tape structure of film is more conducive to the bearing stress of material，energy transmission and energy dissipation.Therefore，UHMWPE film has good application prospects in the field of bullet-proof protection.

Key words: ultra-highmolecularweightpolyethylene, filmmaterial, bullet-proofperformance, bullet-proofmechanism

CLC Number:

TQ325.1⁺2

FU Jie， LI Weiping， HUANG Xiancong， LIU Qiang， LIU Xiaolin， MA Tian. Bullet-proof Performance and Mechanism of New Ultra-high Molecular Weight Polyethylene Film[J]. Acta Armamentarii, 2021, 42(11): 2453-2464.

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