模拟弹性体压缩:探索十个构成方程
Stanisław Kut1, Grażyna Ryzińska1
1Department of Materials Forming and Processing, Rzeszow University of Technology, al. Powstańców Warszawy 8, 35-959 Rzeszów, Poland.
Materials (Basel, Switzerland)
|June 10, 2023
概括
本研究评估了超弹性聚氨弹性体的构成方程. 使用双轴拉伸试验 (变体II) 确定材料常量被证明是最有效的准确数值建模.
科学领域:
- 材料科学 材料科学 材料科学
- 计算力学 计算力学 计算力学
- 聚合物物理 聚合物物理
背景情况:
- 像聚氨弹性体这样的超弹性材料在工程应用中至关重要.
- 准确的数值建模它们在负载下的行为对于设计至关重要.
- 构成方程描述了材料的反应,但它们的有效性取决于参数的确定.
研究的目的:
- 评估超弹性天体的十个构成方程的性能.
- 为了研究不同的方法来确定物质常数的影响.
- 为了建模90 Sh A聚氨弹性体的第一个压缩负载周期.
主要方法:
- 超弹性材料行为的数值建模.
- 使用四种变体确定材料常数:单轴拉伸试验 (I),双轴拉伸试验 (II),平面拉伸试验 (III) 和组合试验 (IV).
- 对数值模型结果的实验验证.
主要成果:
- 建模结果对所选择的构成方程非常敏感,当常数来自单轴拉伸试验 (变量I) 时.
- 使用双轴拉伸试验 (变量II) 确定材料常数在所有评估的构成方程中产生了最有利的结果.
- 变种IV (所有测试) 也表现良好,但变种II提供了更有效的方法.
结论:
- 确定材料常数的方法极大地影响了超弹性材料建模的准确性.
- 双轴拉伸试验为聚氨弹性体的构成模型中的参数识别提供了坚实的基础.
- 精心选择构成方程和参数确定方法对于可靠的数值模拟至关重要.
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