Primary fragments impacting on concrete
Primary fragments impacting on concrete
(OP)
Does anybody out there know how to determine the impact on concrete from primary fragments, travelling at approx 2-3km/s?
Or a change of formulae to help.
Or a change of formulae to help.





RE: Primary fragments impacting on concrete
Primary fragments of what? What formula are you currently using or is it a secret.
desertfox
RE: Primary fragments impacting on concrete
What size particles? What is their shape? How many of them per unit area? What is the impingement angle? What are the particles made of? What type of concrete? What strength concrete?
Formulae don't mean much when dealing with abrasion and durability of concrete. Those are primarily strength and tested parameters.
RE: Primary fragments impacting on concrete
RE: Primary fragments impacting on concrete
My suggestions:
[a] Measure it by doing a MIL-STD-2105 Fragment Impact Test. (If you are government or a gov't contractor, DOD activities routinely do this. Cost is in 4 digits.)
[b] Estimate it via empirical equations available in open source literature, e.g. google search the words "hertz concrete impact" to find journal papers.
[c] check out textbooks in explosive effects, rock blasting, terminal ballistics, etc.
The specifics will depend on the many variables mentioned in the previous posts.
RE: Primary fragments impacting on concrete
Thanks for your comments. Looking at spalling....Trying to determine the imapct from a detonation and although fragments of metal from a casing can be contained the sizes of cracks would be vast for gases to escape.
RE: Primary fragments impacting on concrete
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