Research on multi objective optimization of steel/fiber composite bulletproof armor structure

DOI:	10.11809/bqzbgcxb2023.11.014
Keywords:	composite material; ballistic resistance; finite element analysis; lightweight; multi objective optimization
Abstract:	The NATO level 1 protection requirement is the most frequently used armor protection standard abroad. In order to make the armored vehicle protection level meet the NATO level 1 requirements and achieve a certain degree of body weight reduction, a finite element model of bullet penetration into the target plate is established, and the live bullet test is verified.The thickness of the cured bulletproof steel is 2.5 mm, and the thickness of the UHMWPE fiber layer, the thickness of the aramid fiber layer and the total thickness of the fiber target plate are used as design variables. The penetration depth is the optimization objective. The Pareto solution set of multi objective variables is obtained by the NSGA Ⅱ algorithm, and the optimal solution is obtained by further optimization of the search radius, which is verified by the finite element simulation. The final optimized plan is: the thickness of bulletproof steel is 2.5 mm, the thickness of UHMWPE fiber is 9.3 mm, and the thickness of aramid fiber is 4.2 mm. After optimization, its anti ballistic performance is significantly better than the original scheme, and the protection of the body is more guaranteed. The optimization scheme is reasonable and feasible. The multi objective optimization method based on the NSGA Ⅱ algorithm is effective and feasible, providing strong support for the lightweight design of composite bulletproof armor.
Issue:	Vol. 44 No. 11 (2023)
Published:	2023-11-28
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