公开(公告)号：US20180195845A1

公开(公告)日：2018-07-12

申请号：US15720028

申请日：2017-09-29

Applicant: U.S. Army Research Laboratory ATTN: RDRL-LOC-I

Inventor： Brett R. Sorenson ,  Christopher S. Meyer ,  Richard L. Summers ,  Jason C. Angel ,  Timothy G. Farrand ,  Daniel R. Scheffler

IPC: F42B12/60

Abstract: A cannon projectile having an elongated body with a plurality of elongated and circumferentially spaced segments. At least one tether is attached to at least one end of the segments to hold the segments together. A deployment device, when activated, enables the segments to deploy radially outwardly into a pattern controlled at least in part by the at least one tether using aerodynamic and inertial forces only.

公开(公告)号：US20160018285A1

公开(公告)日：2016-01-21

申请号：US14331921

申请日：2014-07-15

Applicant: U.S. Army Research Laboratory ATTN: RDRL-LOC-I

Inventor： CYRIL L. WILLIAMS ,  Daniel R. Scheffler

IPC: G01M7/08 ,  F42B99/00

CPC classification number: G01M7/08 ,  F42B35/00 ,  F42B99/00

Abstract: A method for extracting material and mechanical properties of a cylinder subject to expansion cause by an explosion so as to better understand the evolution of damage. The method is directed towards obtaining material and mechanical properties of the cylinder between an undeformed state and a state of deformation prior to total fracture. The method includes the steps of providing: (1) a plurality of cylinders, each of which have the same physical dimensions; (2) a plurality of charges, each of the plurality of charges having a different diameter and hence explosive force; and (3) a fluid having a shock impedance less than a shock impedance of any of the plurality of charges. The method further includes the step of placing the charges in a respective cylinders, tilling the cylinder with the fluid and detonating the charge, and recording the cylinder radial velocity during radial expansion and post-mortem material properties.

Abstract translation: 一种用于提取由于爆炸引起膨胀的气缸的材料和机械性能的方法，以便更好地理解损伤的演变。 该方法旨在在总断裂之前在未变形状态和变形状态之间获得气缸的材料和机械性能。 该方法包括以下步骤：（1）多个气缸，每个气缸具有相同的物理尺寸; （2）多个电荷，所述多个电荷中的每一个具有不同的直径并因此具有爆炸力; 和（3）具有小于所述多个电荷中的任一个的冲击阻抗的冲击阻抗的流体。 该方法还包括以下步骤：将电荷放置在各自的气缸中，使气缸与流体一起滚动并引爆电荷，以及在径向膨胀和后验材料性质期间记录气缸的径向速度。