Numerical Analysis on Impact Properties of Steel-aluminum Foam-fiber Composite Structure
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Abstract
The method of numerical simulation was used to study the dynamic response characteristics of steel-aluminum foam-fiber composite structure under the action of impact load. The influence of different panel thickness and core layer thickness on the impact resistance of the composite structure was investigated emphatically to find the rule. Compared the influnce with diferent ratio of aluminum foam sandwich plate and front plate in composite structure, optimal mass ratio was marked to optimize the design. In this case, it can provide data basis for engineering practice. It is indicated that: (1) Within the scope of a certain quality, the composite structure with increasing steel plate perform better than aluminum foam in impact resistance. However, there was a optimal quality ratio between steel plates and aluminum foam. The optimal quality ratio was about 0.97: 1 with 120 tons composite structure with sice of 9.2 m×9.2 m; (2) The optimal quality ratio was about 0.75: 1 ~ 0.83: 1 with 150 tons composite structure. As the front steel plate is 9.5 cm and aluminum foam is 54 cm, the combination property was achieved to resist 300 m/s velocity projectile considered technological requirements and cost. In this way, its weight is only 1/5.67 and volume is only 17% of the reinforced concrete structure under a certain safety reserve, and it can perform better in impact resistance.
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