黏弹性材料等效分数阶微观结构标准线性固体模型

发布时间：2018-09-01 18:46

【摘要】：从黏弹性材料微观链结构出发,以橡胶基黏弹性材料超弹性理论分子网链高斯(Gauss)统计模型和黏滞流动理论为基础,研究黏弹性材料的微观结构、填料等对黏弹性性能的影响.用温频等效原理描述温度对黏弹性材料力学性能的影响,建立了可以有效描述黏弹性材料耗能特性的等效分数阶微观结构标准线性固体模型.采用动态热机械分析仪(DMA)对高聚物黏弹性材料力学性能、耗能能力进行测试.试验表明:在低温区域,储能模量较大,随着温度的升高,储能模量下降显著;能量损耗因子在高温和低温区域数值较小,在玻璃化转变温度附近数值较高.根据测试数据对所提等效分数阶微观结构标准线性固体模型进行验证,该力学模型能够较好地描述黏弹性材料储能模量和能量损耗因子随温度的变化趋势.用9050A和ZN22黏弹性材料对模型的有效性进一步验证,结果表明:9050A和ZN22黏弹性材料具有较好的耗能能力,所提出的等效分数阶微观结构标准线性固体模型能够准确地描述微观结构和填料对黏弹性材料宏观性能的影响,能够准确地描述黏弹性材料在不同温度和频率下的动态力学性能.
[Abstract]:Starting from the micro-chain structure of viscoelastic materials and based on the Gauss statistical model of hyperelastic molecular network and viscous flow theory of rubber-based viscoelastic materials, the effects of microstructure and fillers on the viscoelastic properties of viscoelastic materials are studied. An equivalent fractional order microstructural standard linear solid model was established to describe the energy dissipation characteristics of viscoelastic materials. The mechanical properties and energy dissipation capacity of viscoelastic materials were tested by dynamic thermomechanical analyzer (DMA). The results show that the storage modulus is large in the low temperature region, and decreases with the increase of temperature. The energy dissipation factor is smaller in high temperature and low temperature regions, and higher in the vicinity of glass transition temperature. According to the test data, the proposed equivalent fractional order microstructure standard linear solid model is validated. The mechanical model can well describe the variation of energy storage modulus and energy dissipation factor of viscoelastic materials with temperature. The results show that 9050A and ZN22 viscoelastic materials have good energy dissipation ability. The proposed equivalent fractional order standard linear solid model can accurately describe the effects of microstructure and fillers on the macroscopic properties of viscoelastic materials, and can accurately describe the effects of microstructure and fillers on the macroscopic properties of viscoelastic materials. The dynamic mechanical properties of viscoelastic materials at different temperatures and frequencies are described.
【作者单位】：东南大学混凝土及预应力混凝土结构教育部重点实验室;
【基金】：国家杰出青年科学基金(51625803) 国家重点研发计划(2016YFE0119700) 国家自然科学基金(11572088) 江苏省杰出青年基金(BK20140025) 江苏省重点研发计划(BE2015158) 江苏省333高层次人才江苏省高校优势学科建设项目(CE02-1-47) 江苏省普通高校研究生科研创新计划项目(KYLX16_0247) 中央高校基本科研业务费专项资金资助项目
【分类号】：O341

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