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- From: jonke@brl.mil (Patrick Jonke)
- Newsgroups: sci.military
- Subject: re: DU Rounds
- Message-ID: <C1D8L5.A04@law7.DaytonOH.NCR.COM>
- Date: 24 Jan 93 16:03:05 GMT
- Sender: military@law7.DaytonOH.NCR.COM (Sci.Military Login)
- Organization: NCR Corporation -- Law Department
- Lines: 28
- Approved: military@law7.daytonoh.ncr.com
-
-
- From Patrick Jonke <jonke@brl.mil>
-
- >> ...is it actually a fusion-reaction that would enable surprisingly deep
- >> penetration into armor?
-
- > What happens is on contact the KE of the round becomes heat, melting
- > the armor and the round and forming a high-temperature molten metal jet
- > that slices through the armor.
-
-
- Where on earth did you get this idea? 8-)
-
- KE rounds don't "melt" (neither do shaped charge jets, for that
- matter); the interaction with the armor takes place so fast that there
- isn't time to melt anything. Keep in mind that the term "melt" implies a
- change from solid to liquid and should not be confused with plastic
- deformation. Some energy is taken up by plastic deformation of the
- target and penetrator (which also heats them) and some by momentum transfer.
-
- In a nutshell, DU is used in KE rounds because it is very dense (~18.7
- g/cc) compared to steel (~7.8 g/cc). The primary material property
- factor in penetration is the ratio of threat density to target density.
- To maximize penetration for a given round, you want to make that ratio
- as large as possible. Tungsten (~19.3 g/cc) is used for the same reason.
-
-
- Hope this helps...
-