Impact buckling of thin bars in the elastic range for any end condition (1934)
NASA Technical Reports Server (NTRS) · leaf 67
N.A.C.A, Technical Memorandum No.749 Pigs. 18,19 3.0 2.0 1.0 0 1.0 2.0 3.0 4.0 "b Figure 18.-Ratio c for ag = 0.77 and a greater range of shock period (h).
NASA Technical Reports Server (NTRS)
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