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An engineering model for the penetration of a rigid-rod into a Cowper–Symonds low-strength material

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Abstract

The impact of a rigid-rod into a low-strength target is an ubiquitous research problem in many scientific and engineering fields. Typically, this impact has been modeled by the expansion of a pressurized spherical cavity in an unbounded elasto-plastic medium. In this paper, an engineering penetration model was developed using the dynamic spherical cavity expansion theory for an elasto-plastic, compressible, strain-dependent and strain-rate-sensitive material. The material plastic flow behavior was modeled using the Cowper–Symonds strength model. The engineering model was numerically solved, and its predictions were compared with results of computational finite-elements simulations performed in ANSYS/AUTODYN. Additionally, engineering and computational models were validated with experimental data using spherical-nosed, M300 steel projectiles impacting a semi-infinite Al 6061-T651 plate. Comparisons showed good agreement among engineering model results, computational model results and experimental data.

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Authors and Affiliations

  1. Structural Integrity Research Group, Mechanical Engineering Department, Universidad de los Andes, CR 1E 19A 40, Bogota, DC, 111711, Colombia

    M. F. Buchely & A. Maranon

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  1. M. F. Buchely
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  2. A. Maranon
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Correspondence to A. Maranon.

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Buchely, M.F., Maranon, A. An engineering model for the penetration of a rigid-rod into a Cowper–Symonds low-strength material. Acta Mech 226, 2999–3010 (2015). https://doi.org/10.1007/s00707-015-1359-6

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  • DOI: https://doi.org/10.1007/s00707-015-1359-6

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