Papers by Keyword: Resistance to Penetration

Abstract: In the original to remove steel and steel fiber reinforced concrete coarse aggregate in quartz powder and a small amount of activator, can boost steel fiber content, and its application in construction makes it more convenient, but how the penetration resistance works is not particularly clear. Through the penetration resistance experiment, found that when joined the SF and BF, RPC can still keep complete even after three times by penetration ,indicating the good performance of penetration resistance.

Abstract: A “sandwich-style” composite target with a 45 steel surface plate, polyethylene rubber sandwich plate, and 45 steel back plate is studied for jet penetration resistance. The effects of varying layer thickness are analyzed using AUTODYN software and energy-thickness (E-T) curves in Matlab. The influence of the scale effect on each of these composite layers is analyzed. Results from the E-T curves confirm that varying the thickness of the 45 steel back plate has an obvious influence on jet penetration resistance. Moreover, varying the thickness of the front plate and the sandwich plate has a large effect on jet fracture after penetration of the composite target. Experiments prove that the results of the simulation are correct, and that the scale effect is present for these composite targets under jet penetration.

Abstract: Recently, high-performance hybrid composites have been used for various applications which require the high strength, high stiffness and low weight. There are growing needs in an automotive, an aircraft, and military applications for composite materials since they have good structural characteristics. They also have good penetration resistance and structural integrity after impact. In order to clarify the mechanism of high-speed destruction for composite materials, this study examined the penetration resistance and the fracture behavior of CFRP (Carbon Fiber Reinforced Plastic) Laminates by using ballistic range (one-stage light gas gun). Test materials for investigation are carbon/epoxy laminated composite materials with fiber direction; [0°]8, [0°/45°]4s, [ 0°/90°]4s, [ 0°/45°/90°]3s and [ 0°/45°/-45°90°]2s. The high speed camera allows us to capture and analyze the dynamic penetration phenomena of the test materials.

Abstract: In this study, dynamic penetration phenomena of high-velocity impact of magnesium alloy were investigated. The surface hardness of magnesium alloy (AZ31B-O) and the heat-treated magnesium alloy (AZ31B-200°C, AZ31B-300°C, and AZ31B-430°C) were examined using Micro Vickers, and the influence of the heat treatment temperature was observed. We analyzed the metal organization using a microscope. We also used a ballistic range (two-stage light gas gun), and the test specimens were set at 0°obliquity at room temperature. A high-speed camera allowed us to capture and analyzed the dynamic penetration phenomena of the test specimen.