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发表时间：2017-01-01

发表刊物：计算力学学报

卷号：34

期号：4

页面范围：453-458

ISSN号：1007-4708

摘要：Although the spatial variation of the material property required for achieving thermal invisibi-lity in the structure,i.e.an invisible cloak for heat flux,can be obtained through transformation thermo-dynamics,the design of the cloak is practically very difficult to be implemented due to the complexity in distribution and local extreme (infinite) in value of the required thermal conductivity of the material.Hence,it is of great engineering significance to explore effective ways to design invisibility cloak for heat by using conventional materials.In this paper,we proposed a way to design annular thermal invisibility cloak by using fiber reinforced composite.The required material property distribution (i.e.thermal conducti-vity) was obtained based on transformation thermodynamics first.Then,through composite microstructure design,the fiber layout (volume fraction and orientation) was determined to match with the required thermal conductivity distribution.Using silver as the reinforcement and air as the matrix,the fiber layout of the annular cloak was obtained,which was easy to be fabricated by ordinary materials.The simulation results showed almost perfect invisible cloak properties,thus validating the proposed design method.

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