In this paper, the penetration process of different explosive reactive armors by shaped charge jet has been investigated numerically using Autodyn-2D hydrocode. Each ERA module is considered to consist of steel/explosive/steel layers, in order. Different thicknesses of steel and explosive layers have been simulated considering that all ERA modules are inclined by NATO angle of 60°. The penetrating jet is simulated similar to that formed from the small caliber shaped charge used. The numerical results are concerned with the determination of the performance of each simulated ERA module against shaped charge jet. An experimental program has been conducted to assess the predicted results obtained by Autodyn-2D hydrocode. A ballistic setup was constructed and the penetration depth into the steel witness placed behind each tested ERA module was measured. Also, the initiation phenomena of the explosive layer of ERA modules were discussed using different models and Autodyn-2D initiation theory, respectively. The explosive layers of ERA modules were experimentally initiated under the attack of the used shaped charge jet. Good agreement between the measured and corresponding predicted performance for each ERA module against shaped charge jet is obtained. Samples of predicted results due to the penetration of shaped charge jet into different ERA modules are presented and discussed.
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