Back to articleBar graph showing the impact velocity of a number of impact tests. The height of the bar represents the impact velocity in a particular test. Some of the bars in the graph are shaded and some are not. The ones that are shaded represent tests in which the projectile did not penetrate the specimens. These tests were conducted at lower impact speeds than those where the projectile penetrated and passed through the specimen (which are represented by the unshaded bars). The speed required to penetrate the specimen lies between the speed associated with the highest shaded bar and that associated with the lowest unshaded bar. The figure demonstrates that this penetration speed for Zylon material is approximately twice as much as that for Kevlar.
Last updated: June 2002
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