Manual for Prediction of Blast, Fragment Loading on by W. E. Baker

By W. E. Baker

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Inscriptions: Horoi, Poletai Records, and Leases of Public Lands (Athenian Agora 19)

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1-6 t 1 . 1 2 Baker, W . E . , Kulesz, J. , R i c k e r , R. , Westine, P. , P a r r , V. B . , Vargas, L . M . , and Moseley, P. K . , "Workbook f o r E s t i m a t i n g t h e E f f e c t s of A c c i d e n t a l Explosions i n P r o p e l l a n t Handling Systems, 'I NASA C o n t r a c t o r Report 3023, C o n t r a c t NAS 3-20497, NASA Lewis Research Center, August, 1978. 1 . 1 3 H u f f i n g t o n , N o r r i s J . , J r . ), Behavior of Materials Under Dynamic Loading, The American S o c i e t y of Mechanical Engineers, New York, New York, 1965.

I s d i c t a t e d by c u r r e n t e x p l o s i v e s s a f e t y r e g u l a t i o n s such a s AMCR 385-100 (Ref. 2 . 4 ) , which g i v e s q u a n t i t y - d i s t a n c e s t a n d a r d s . These s t a n d a r d s are based p a r t l y on a c c i d e n t d a t a , p a r t l y on l i m i t i n g a i r b l a s t o v e r p r e s s u r e s , and p a r t l y on v e r y approximate fragment s a f e t y d i s t a n c e s . I f one c a n prove by t e s t o r conservative a n a l y s i s t h a t a l l fragments a r e c o n t a i n e d i n a n e x p l o s i v e f a c i l i t y , s a f e t y d i s t a n c e s can sometimes b e d r a s t i c a l l y reduced.

T h i s a f t e r b u r n i n g p r o c e s s has o n l y a s l i g h t e f f e c t on b l a s t wave p r o p e r t i e s because i t is so much slower t h a n detonation. When t h e d e t o n a t i o n f r o n t r e a c h e s t h e s u r f a c e of a b a r e e x p l o s i v e , i t i s t r a n s m i t t e d i n t o t h e s u r r o u n d i n g a i r as a n i n t e n s e shock wave. * The shock f r o n t slows v e r y r a p i d l y as i t d i v e r g e s outward, and decays r a p i d l y i n s t r e n g t h ( p r e s s u r e ) , temperature, d e n s i t y , and outward flow.

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