有序多孔基互穿相复合材料压缩力学性能的可调控设计

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中图分类号：TB332 文献标志码：A

Abstract：The designability of compressive modulus and platform stress and the controllability of compressive mechanical properties of porous materials are the key and difficult points in improving the application of porous materials.The design method of ordered porous-based interpenetrating phase composites （IPCs） is an effective method for designing and controlling the mechanical properties of composites.First，the constitutive equations were established according to the compression characteristics of the resin materials，and the proposed model was implanted into the finite element software.Then，combined with the hyperelastic Ogden model，the finite element simulation of ordered primitive skeletons and their IPCs was carried out under compressive deformation. The effects of the skeleton's volume fraction and the filling phase polydimethylsiloxane's mechanical properties on the compressive properties of the composites were discussed.Finally，the influence mechanism of the interpenetrating on compression deformation of ordered porous-based IPCs was analyzed.The results showed that the Primitive skeleton performed well with a high modulus and wide stress platform.However，the bending of the primitive skeleton caused the stress drop. For the design，the interpenetrating effectively restrains the stress drop behavior caused by the thin wall bending of the skeleton and optimizes the stress distribution of the skeleton.The changes in the skeleton's volume fraction and filing phase's properties can effectively control the composite's compression modulus and stress plateau level.The ordered porous-based IPCs may solve the problems of low compression modulus，large platform stress diffrence，and stress drop of traditional polymeric porous materials.The paper points out a direction for the design of adjustable compresson modulus and platform stress ，which is expected to accelerate the application of porous materials in energy absorption and vibration reduction cushion.

Key words ： interpenetratingphase composite ; ordered porous structure ; viscoplastic constitutive model; compressive deformation;controllability;finite element simulation

高分子多孔材料由于具有吸能减振的作用，而被作为精密仪器包装防护、精密器件间隙填充、回转体预紧防转的重要构件材料[1-2]。（剩余16061字）