Experimental Mechanics

, Volume 59, Issue 1, pp 121–123 | Cite as

A Scaling Law for APM2 Bullets and Aluminum Armor Plates

  • M. J. Forrestal
  • B. LimEmail author
  • W. Chen
Brief Technical Note


In a previous paper, we presented a scaling law for the ballistic-limit velocity for the 7.62 mm APM2 bullet and five aluminum alloy plates. This scaling law predicts that the ballistic-limit velocity is proportional to the square root of the product of the plate thickness and a material strength term. In this note, we show that this same scaling law can be used to accurately predict ballistic-limit velocity for the larger 12.7 mm APM2 bullet.


APM2 bullets Aluminum armor plates Scaling law 



Co-author Lim was partially supported by a collaborative agreement between US Army PEO Soldier and Purdue University (W91CRB-14-C-0025). Co-author Chen was partially supported by Office of Naval Research (N00014-17-1-2711).


  1. 1.
    Forrestal MJ, Børvik T, Warren TL, Chen W (2014) Perforation of 6082-T651 aluminum plates with 7.62 mm APM2 bullets at normal and oblique impacts. Exp Mech 54(3):471–481. CrossRefGoogle Scholar
  2. 2.
    Cheeseman B, Gooch W, Burkins M (2008) Ballistic evaluation of aluminum 2139-T8. In: Proceedings of the 24th international symposium on ballistics, New Orleans. pp 651–659Google Scholar
  3. 3.
    Gallardy DB (2017) Ballistic results for 5083-H131 and 6061-T651. E-mail communication to MJ ForrestalGoogle Scholar
  4. 4.
    Gallardy DB (2015) Ballistic Evaluation of 6055 Aluminum (No. ARL-MR-0904). US Army Research LaboratoryGoogle Scholar
  5. 5.
    Ryan S, Nguyen LH, Gallardy D, Cimpoeru SJ (2018) A scaling law for predicting the ballistic limit of aluminium alloy targets perforated in ductile hole formation. Int J Impact Eng 116:34–50. CrossRefGoogle Scholar

Copyright information

© Society for Experimental Mechanics 2018

Authors and Affiliations

  1. 1.Fort WorthUSA
  2. 2.School of Aeronautics and AstronauticsPurdue UniversityWest LafayetteUSA
  3. 3.School of Materials EngineeringPurdue UniversityWest LafayetteUSA

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