计及时变演化特征的硅泡沫垫层非线性黏弹性模型研究

范志庚; 万强; 牛红攀; 靳凡

doi:10.21656/1000-0887.440249

计及时变演化特征的硅泡沫垫层非线性黏弹性模型研究

doi: 10.21656/1000-0887.440249

中国工程物理研究院总体工程研究所，四川绵阳 621900

基金项目:

国家自然科学基金委员会-中国工程物理研究院NSAF联合基金 U2130206

详细信息

通讯作者:
范志庚(1978—)，男，高级工程师，博士(通讯作者. E-mail: fanzg@caep.cn)

中图分类号: O341
计量
- 文章访问数: 95
- HTML全文浏览量: 32
- PDF下载量: 27
- 被引次数: 0
出版历程
- 收稿日期: 2023-08-17
- 修回日期: 2023-12-13
- 刊出日期: 2024-02-01

A Nonlinear Viscoelastic Model for Silicon Rubber Foam Cushion Considering Time-Varying Evolution Characteristics

Institute of Systems Engineering, China Academy of Engineering Physics, Mianyang, Sichuan 621900, P.R.China

摘要

摘要: 基于黏弹性基本理论，引入材料非线性特征，考虑了材料加载、保载应力松弛历史、老化效应以及黏弹性模型各运动单元退化的差异性，并从两种老化机制出发，获得了老化硅泡沫垫层力学模型以及长时应力松弛硅泡沫垫层接续加载力学模型.模型机理清晰，能够反映材料服役历史信息及其对力学效应的影响.
- 硅泡沫垫层 /
- 非线性黏弹性 /
- 应力松弛 /
- 老化 /
- 力学模型
Abstract: Based on the common theory of viscoelasticity, the mechanical model for aging silicon rubber foam cushion and the continuous loading prediction model for long-term stress relaxation silicon foam cushion, were obtained, in view of the 2 aging mechanisms, the nonlinear material characteristics, the loading process, the stress relaxation history, the aging effect and the degradation difference of each motion element of viscoelastic model. The mechanism of the model is clear, and it can reflect the information of the material service history and the corresponding effects on mechanics of the silicon rubber foam cushion.
- silicon rubber foam cushion /
- nonlinear viscoelasticity /
- stress relaxation /
- aging /
- mechanical model

HTML全文

图 1 广义Maxwell模型

Figure 1. General Maxwell model

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图 2 材料老化不可逆变形

Figure 2. Irreversible deformation schematic diagram of the aged foam

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图 3 材料老化前后的压缩力学性能曲线

Figure 3. Compressive curves of fresh and aged silicone rubber foams

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图 4 广义黏弹塑性模型

Figure 4. The general viscoelastic-plastic model

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图 5 Burgers模型

Figure 5. The Burgers model

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图 6 某硅泡沫垫层压缩实验曲线拟合

Figure 6. Fitting of the compressive curve of the silicone rubber foam

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图 7 8参数黏弹塑性模型

Figure 7. The 8-parameter viscoelastic-plastic model

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图 8 3种状态力学响应对比

Figure 8. Differences in mechanical responses

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参考文献(15)

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