Accession Number : AD0762535

Title :   Buckling of Long Rod Penetrators.

Descriptive Note : Memorandum rept.,

Corporate Author : BALLISTIC RESEARCH LABS ABERDEEN PROVING GROUND MD

Personal Author(s) : Wright,Thomas W.

Report Date : MAY 1973

Pagination or Media Count : 27

Abstract : The dynamic stability of long rod penetrators is examined theoretically. The basic assumption behind the analysis, which is based on a paper by Abrahamson and Goodier, is that plastic bending occurs as a perturbation superimposed on a uniform axial stress. The perturbations are controlled by the strain hardening curve, and the axial stress is the yield stress. The basic analysis introduces nondimensional scaling parameters in a natural way and leads to estimates for time of buckling and the buckled wavelength. The time to buckle is then compared with two load release times, one arising from complete penetration or stoppage and the other from reflections at the rear of the projectile. Tentative design criteria for the dynamic stability of long rod penetrators, based on the time comparisons, are discussed and presented graphically. (Author)

Descriptors :   (*ARMOR PLATE, *TERMINAL BALLISTICS), IMPACT, PENETRATION, LOADS(FORCES), STRESSES, BUCKLING, COMPRESSIVE PROPERTIES, BENDING

Subject Categories : Ammunition and Explosives
      Ballistics

Distribution Statement : APPROVED FOR PUBLIC RELEASE