深水环境下粘弹性复合材料夹层结构蠕变特性研究

文章结合单轴压缩蠕变试验和粘弹性材料广义Maxwell建模理论得到吸声和浮体两种粘弹性填充材料的松弛模量Prony级数系数，开展了深水环境下粘弹性复合材料夹层结构蠕变特性试验，并将之与仿真研究结果进行对比，得到如下结论：复合材料夹层结构长时蠕变初期，芯材蠕变较表层复合材料占主导地位；随着时间增加，表层复合材料基体的粘弹性特性所表现出的蠕变和松弛现象交织出现，表层应变出现波动；芯材蠕变对复合材料夹层结构长时蠕变变形的贡献约为60%。

Creep characteristics analysis of viscoelastic composite sandwich strcuture under static pressure of deep water environment

Combined with the uniaxial compression creep test and viscoelastic material modeling theory of generalized Maxwell, the coefficients of relaxation modulus Prony series of absorption and floating viscoelas-tic filler material were obtianed. The creep charateristic experiment of viscoelastic composite sandwich structure under water was carried out, and the results were compared with the simulation research. The re-sults show that at the long-term creep stage of composite materials sandwich structure, the core material has a dominant presence compare with composite material; with the increase of time, the creep and relax-ation phenomena exhibited by viscoelastic properties of the surface composite matrix appear alternately, the surface strain fluctuates;on long-term creep deformation of composite sandwich structure, the core ma-terial contributes about 60%.