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首页> 外文期刊>Journal of aerospace engineering >Ballistic Impact of Braided Composites with a Soft Projectile
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Ballistic Impact of Braided Composites with a Soft Projectile

机译：带有软弹的编织复合材料的弹道冲击

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摘要

Impact tests using a soft gelatin projectile were performed to identify failure modes that occur at high strain energy density during impact loading. Failure modes were identified for aluminum plates and for composites plates and half-rings made from triaxial carbon fiber braid having a 0/±60° architecture. For aluminum plates, a large hole formed as a result of crack propagation from the initiation site at the center of the plate. For composite plates, fiber tensile failure occurred in the back ply at the center of the plate. Cracks then propagated from this site along the ±60° fiber directions until triangular flaps opened to form a hole. For composite half-rings fabricated with 0° fibers aligned circumferentially, fiber tensile failure also occurred in the back ply. Cracks first propagated from this site perpendicular the 0° fibers. The cracks then turned to follow the ±60° fibers and 0° fibers until rectangular flaps opened to form a hole. Damage in the composites was localized near the impact site, while cracks in the aluminum extended to the boundaries.
机译：进行了使用软明胶射弹的冲击试验，以识别在冲击载荷期间高应变能密度下发生的破坏模式。确定了铝板，复合板和由具有0 /±60°结构的三轴碳纤维编织物制成的半环的失效模式。对于铝板，由于裂纹从板中心的起始位置传播而形成了一个大孔。对于复合板，纤维拉伸失败发生在板中心的后层。然后，裂纹从该位置沿光纤的±60°方向传播，直到三角形的翼片打开形成孔为止。对于由0°纤维沿周向排列而制成的复合半环，在后帘布层中也会发生纤维拉伸断裂。裂纹首先从垂直于0°纤维的位置开始传播。然后将裂纹转向以跟随±60°纤维和0°纤维，直到打开矩形折板以形成孔为止。复合材料的损坏位于冲击点附近，而铝的裂纹扩展到边界。

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