Abstract:
According to Lavrentiev's hydrodynamic theory, the penetration depth of a shaped-charge jet is determined by its total length. However, experience of practical application of shaped charges has shown that the penetration usually ceases before the jet is completely used up. For a reliable description of experimental results, the effective length and the effective (critical) velocity of the shaped-charge jet are introduced to exclude from consideration the closing section of the jet, which various reasons is not involved in penetration. Effective velocity values are introduced into calculation methods as constants for a specific pair of jet and target materials or in the form of an empirical dependence on the focal length. The possibility of separating the jet into effective and ineffective sections based on physically justified reasons without the need to construct empirical dependences is considered.
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