Transient responses of double-curved sandwich two-layer shells resting on Kerr's foundations with laminated three-phase polymer/GNP/fiber surface and auxetic honeycomb core subjected to the blast load  

作　　者：Nguyen Thi Hai Van Thi Hong Nguyen 

机构地区：[1]Researcher&Lecturer,Faculty of Industrial Education,The University of Danang-University of Technology and Education,48 Cao Thang,Danang,550000,Viet Nam [2]Researcher&Lecturer,Faculty of Mechanical Engineering,Thuyloi University,175 Tay Son,Dong Da,Hanoi,100000,Viet Nam

出　　处：《Defence Technology（防务技术）》2024年第5期222-247,共26页Defence Technology

摘　　要：This work uses refined first-order shear theory to analyze the free vibration and transient responses of double-curved sandwich two-layer shells made of auxetic honeycomb core and laminated three-phase polymer/GNP/fiber surface subjected to the blast load.Each of the two layers that make up the double-curved shell structure is made up of an auxetic honeycomb core and two laminated sheets of three-phase polymer/GNP/fiber.The exterior is supported by a Kerr elastic foundation with three characteristics.The key innovation of the proposed theory is that the transverse shear stresses are zero at two free surfaces of each layer.In contrast to previous first-order shear deformation theories,no shear correction factor is required.Navier's exact solution was used to treat the double-curved shell problem with a single title boundary,while the finite element technique and an eight-node quadrilateral were used to address the other boundary requirements.To ensure the accuracy of these results,a thorough comparison technique is employed in conjunction with credible statements.The problem model's edge cases allow for this kind of analysis.The study's findings may be used in the post-construction evaluation of military and civil works structures for their ability to sustain explosive loads.In addition,this is also an important basis for the calculation and design of shell structures made of smart materials when subjected to shock waves or explosive loads.

关 键 词：Blast load Two-layer shell Polymer/GNP/Fiber surface Auxetic honeycomb Shear connectors 

分 类 号：TJ01[兵器科学与技术—兵器发射理论与技术]