摘要:
A typical inventive embodiment describes a tubular shape and comprises a rigid outer layer, an elastomeric middle layer and a rigid inner layer. The elastomeric material is a strain-rate-sensitive polymer (e.g, polyurethane or polyurea) having a Young's modulus of approximately 700-1000 psi at 100% strain, and strong strain-rate-sensitivity in approximately the 103/second-106/second range. By the time that the projectile reaches the rigid inner layer, a projectile that impacts the three-layer system (commencing at the rigid outer layer) is structurally and kinetically diminished in its destructiveness by the rigid outer layer together with the elastomeric middle layer. Furthermore, the elastomeric middle layer becomes more rigid during a brief period in which it absorbs energy from the projectile, then again becomes elastic in a manner formative of a membrane covering the rigid inner layer. The elastomeric membrane tempers leakage if rupturing of the rigid inner layer has occurred.
摘要:
An apparatus and method for treatment of articles, using glass failure generated pulses. The apparatus and method is directed towards the hardening and compaction of a spherical article surrounded by a glass orb in a confined arrangement. The apparatus includes a striker having first and second opposing strikers for striking the glass orb from different sides of the confinement arrangement, to create an explosive reaction that pressure-treats the spherical article, thereby causing the hardening and compaction.
摘要:
An apparatus and method for treatment of articles, using glass failure generated pulses. The apparatus and method is directed towards the hardening and compaction of a glass-covered elongated object that is impacted by a flyer plate having a shape that is complimentary to that of the elongated object. The flyer plate is propelled by, an explosive reaction to create the impact on the glass-covered elongated object. This results in an explosive reaction that pressure-treats the elongated object, thereby causing the hardening and compaction.
摘要:
A lightweight armor for resisting penetration by both fragments and high velocity sharply pointed projectiles. The lightweight armor includes a slide region and a receiving region, with the slide region having a backing material coated with polyurea to slidably redirect projectiles towards the receiving region, which may include high strength thickened projectile stopping materials.