超高分子量聚乙烯平纹织物布的弹道冲击响应与破坏特征OA

Aircraft components in real combat environments are frequently exposed to threats from high-speed pen-etrating projectiles such as explosive fragments and bullets.Enhancing their anti-penetration capability is critical to en-suring the safe operation of aircraft.Ultra-High Molecular Weight Polyethylene(UHMWPE)fabric,renowned for its lightweight nature and exceptional strength,has been widely adopted in ballistic protection applications.This study fo-cuses on UHMWPE plain weave fabrics,employing ballistic impact experiments and meso-scale numerical simulations to systematically investigate the effects of projectile geometry,impact velocity,and penetration angle on its ballistic re-sistance and damage mechanisms.The results reveal that UHMWPE plain weave fabrics subjected to ballistic impact primarily exhibit a cross-shaped deformation zone accompanied by a distinct pyramidal back protrusion.Compared to spherical projectiles,flat-nosed projectiles demonstrate lower penetration capability and a higher ballistic limit velocity.This is attributed to the larger contact area between flat-nosed projectiles and the fabric,which induces broader defor-mation zones and shear plugging-dominated failure.In contrast,spherical projectiles tend to cause yarn slippage and pull-out within the fabric.Additionally,the penetration angle of flat-nosed projectiles significantly influences the fabric's energy absorption capacity.As the impact angle increases,the fabric's anti-penetration performance deteriorates.This research provides critical insights into the ballistic failure mechanisms of UHMWPE plain weave fabric and offers a foundation for optimizing the design of high-performance fiber-based protective materials.