Abstract
This study presents an explosion-resistant hybrid system containing a steel slab and a carbon fiber-reinforced polymer (CFRP) frame. CFRP, which is a high-strength material, acts as an impact reflection part. Steel slab, which is a high-ductility material, plays a role as an impact energy absorption part. Based on the elastoplastic behavior of steel, a numerical model is proposed to simulate the dynamic responses of the hybrid system under the air pressure from an explosion. Based on this, a case study is conducted to analyze and identify the optimal design of the proposed hybrid system, which is subjected to an impact load condition. The observations from the case study show the optimal thicknesses of 8.2 and 7 mm for a steel slab and a ϕ100 mm CFRP pipe for the hybrid system, respectively. In addition, the ability of the proposed hybrid system to resist an uncertain explosion is demonstrated in the case study based on the reliability methodology.
Highlights
Military vehicles are usually armored against explosions or impact loads
The results showed the role of carbon fiber-reinforced polymer (CFRP) layers in increasing the dynamic load-bearing capacity and reducing the deformation due to the blast impact of the hybrid beam
The failure probability for the steel slab and CFRP frame with regard to the thicknesses of both the steel slab andindex φ100 mmboth pipe are computed and formulated a reliability with th
Summary
Military vehicles are usually armored against explosions or impact loads. In the armor industry, steel appears to be the most commonly used material so far [1], besides others such as depleted uranium, which are used to reinforce armor to carry low loads with high density. The tensile strength and stiffness of steel structure were improved significantly by CFRP [11] From another perspective, when an explosion takes place, an explosion-resistant object must receive a fairly large amount of energy in a very short time. The observations showed the good effect of CFRP in improving the bearing capacity and energy absorption and reducing the deformation of RC members. The work of Wang et al [28] presented an analysis of the deformation and ultimate strength of a CFRP–epoxy–steel hybrid beam under blast in improving the bearing capacity and energy absorption and reducing the deformation of RC members. The results showed the role of CFRP layers in increasing the dynamic load-bearing capacity and reducing the deformation due to the blast impact of the hybrid beam. The observations from the work of Mokhtaru and Nia [29] showed the proper protective steel pipelines byCFRP
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