Investigation of failure modes and influence on ballistic performance of Ultra-High Molecular Weight Polyethylene (UHMWPE) uni-directional laminate for hybrid design

Yanfei Yang, Xiaogang Chen

    Research output: Contribution to journalArticlepeer-review

    Abstract

    For hybrid design of soft body armour, material selection must be based on ballistic characteristics of materials. This study aims to identify ballistic characteristics of Ultra-High Molecular Weight Polyethylene (UHMWPE) uni-directional (UD) laminate, including failure modes of UHMWPE fibres during ballistic impact and its influence on ballistic performance of UD laminate. According to fractorgraphic analysis, thermal damage of UHMWPE fibres is obvious and more significant for front layers at the striking face, which results in material properties degradation during impact. Ballistic test results showed when Dyneema UD laminate was placed on the striking face before Twaron fabric, ballistic performance including energy absorption and Backface signature (BFS) exhibits obvious degradation. Finite Element (FE) results showed when material properties degradation of Dyneema UD induced by thermal damage is taken into account, stress wave propagation and transverse deflection of Dyneema UD is highly constrained, which leads to quick perforation. As a result, energy absorption of whole hybrid panel is decreased.

    Original languageEnglish
    Pages (from-to)233-243
    Number of pages11
    JournalComposite Structures
    Volume174
    Early online date17 Apr 2017
    DOIs
    Publication statusPublished - 15 Aug 2017

    Keywords

    • Ballistic performance
    • Finite Element (FE)
    • Hybrid panel
    • Thermal damage
    • Ultra-High Molecular Weight Polyethylene uni-directional laminates

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