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Acta Armamentarii ›› 2022, Vol. 43 ›› Issue (1): 29-36.doi: 10.3969/j.issn.1000-1093.2022.01.004

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Ballistic Damage Characteristics of Cowhide as Skin Surrogate

XIONG Manman1,2, YAN Wenmin2, XU Cheng1, QIN Bin2, MA Xuejiao2   

  1. (1.School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China;2.Science and Technology on Transient Impact Laboratory, No.208 Research Institute of China Ordnance Industries, Beijing 102202, China)
  • Online:2022-03-01

Abstract: To explore the similarity between cowhide and human skin, the ballistic impacting experiments were carried out on cowhide in vitro and live creature and the mechanical experiment was carried out on cowhide. The experimental results are used to analyze the mechanical properties, threshold characteristics of cowhide, as well as the impact damage characteristics of creature and cowhide. Results indicate that the tensile failure processes of cowhide and human skin exhibit a similar three-stage pattern: slow rising, linear rising, and rapid falling. The relative errors of strain energy density, failure strength and failure strain are only 6.56%, 6.17% and -4.31%, respectively. The creature and cowhide subjected to the rubber bullet impact have similar partitioned damage characteristics and damage size, that is, the diameters of lesion skin area and kin peeling area are almost equivalent to the bullet diameter, and the diameters of hematoma zone and the fold zone are positively related to the specific kinetic energy of rubber bullet. The perforation threshold specific kinetic energy of cowhide impacted by 6 mm-diameter steel ball is 29.97% higher than that of PMHS skin calculated by the empirical formula. However, considering that the empirical formula is mainly based on the experiments of dead or older cadaver volunteers, the perforation threshold specific kinetic energy data is relatively conservative. It can be concluded that cowhide is similar to human skin in terms of mechanical properties, impact damage characteristics, perforation threshold specific kinetic energy, etc., which is currently a reasonable ballistic skin surrogate.

Key words: woundballistic, cowhide, skinsurrogate, mechanicalproperty, partitioneddamage, perforationthreshold

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