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. 2021 Apr 30;13(9):1450. doi: 10.3390/polym13091450

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© 2021 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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The deformed plates after the ballistic test: (a) strike face (left) and back face (right) of the flat non-hybrid [KFRP₄₀] plate (#1), sample 1, shoot 1; (b) path of the stopped bullet between KFRP layers in the flat non-hybrid [KFRP]₄₀ plate (#1); (c) strike face (left) and back face (right) of the curved non-hybrid [KFRP₄₀] plate (#2), sample 2, shoot 1; (d) strike face (left) and back face (right) of the flat hybrid [CFRP₄/KFRP₆]₄ plate (#3), sample 1, shoot 1; (e) strike face (left) and back face (right) of the curved hybrid [CFRP₄/KFRP₆]₄ plate (#4), sample 3, shoot 1; (f) strike face (left) and back face (right) of the flat hybrid [CFRP₁₀/KFRP₃₀] plate (#5), sample 1, shoot 1; (g) strike face (left) and back face (right) of the curved hybrid [CFRP₁₀/KFRP₃₀] plate (#6), sample 2, shoot 1; (h) strike face (left) and back face (right) of the flat [CFRP₄/[DPRP₂/KFRP₁₀]₃] plate (#7), sample 3, shoot 1; (i) stopped bullet inside the [CFRP₄/[DPRP₂/KFRP₁₀]₃] plate.

The deformed plates after the ballistic test: (a) strike face (left) and back face (right) of the flat non-hybrid [KFRP₄₀] plate (#1), sample 1, shoot 1; (b) path of the stopped bullet between KFRP layers in the flat non-hybrid [KFRP]₄₀ plate (#1); (c) strike face (left) and back face (right) of the curved non-hybrid [KFRP₄₀] plate (#2), sample 2, shoot 1; (d) strike face (left) and back face (right) of the flat hybrid [CFRP₄/KFRP₆]₄ plate (#3), sample 1, shoot 1; (e) strike face (left) and back face (right) of the curved hybrid [CFRP₄/KFRP₆]₄ plate (#4), sample 3, shoot 1; (f) strike face (left) and back face (right) of the flat hybrid [CFRP₁₀/KFRP₃₀] plate (#5), sample 1, shoot 1; (g) strike face (left) and back face (right) of the curved hybrid [CFRP₁₀/KFRP₃₀] plate (#6), sample 2, shoot 1; (h) strike face (left) and back face (right) of the flat [CFRP₄/[DPRP₂/KFRP₁₀]₃] plate (#7), sample 3, shoot 1; (i) stopped bullet inside the [CFRP₄/[DPRP₂/KFRP₁₀]₃] plate.