考虑孔隙及其应用的针复合材料的机械和热性能的多尺度预测
Shiyong Sun1,2, Junlong Wang1,2, Hailin Li1,2
1School of Mechanical Engineering, Dalian University of Technology, Dalian 116024, China.
Materials (Basel, Switzerland)
|November 13, 2025
概括
陶复合材料的制造缺陷导致性能变化,挑战使用寿命预测. 这项研究建立了孔隙性,弹性模量和热扩散之间的关系,有助于材料评估.
科学领域:
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
- 陶复合材料 陶复合材料
背景情况:
- 针式陶复合材料对高温应用具有前景.
- 制造缺陷,特别是毛孔,导致性能变化,并阻碍使用寿命预测.
- 准确地描述材料属性对于可靠的性能至关重要.
研究的目的:
- 研究制造缺陷 (孔隙) 对针陶复合材料性能的影响.
- 建立基于孔隙性的弹性模量和热扩散系数的预测模型.
- 开发相关方程来评估孔隙性和材料特性.
主要方法:
- 使用X射线计算机断层扫描 (CT) 识别和量化毛孔.
- 开发了多尺度模型,其中包含了孔隙信息.
- 使用多尺度方法预测了弹性模量和热扩散系数.
- 模型的准确性与实验数据 (拉力和热扩散测试) 进行了验证.
主要成果:
- 透度和弹性模量之间确立了明确的关系.
- 确定了孔隙度和热扩散系数之间的关系.
- 与实验结果相比,多尺度建模方法的准确性很高.
- 导出了连接热扩散系数,多孔度和弹性模量的相关方程.
结论:
- 多尺度建模为预测具有制造缺陷的陶复合材料的性能提供了一种有效的方法.
- 确定的相关性为评估孔隙性和弹性性质提供了一种新的方法.
- 这项研究有助于更准确地预测高温结构部件的使用寿命.
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