对MWCNT增强复合板的曲行为进行数值研究
Jitendra Singh1, Ajay Kumar2, Barbara Sadowska-Buraczewska3
1Government Engineering College Buxar, Bihar 802103, India.
Materials (Basel, Switzerland)
|July 30, 2025
概括
这项研究提出了一种新方法,用于预测用多壁碳纳米管 (MWCNT) 填充剂增强的复合板的曲. 使用先进的理论准确地模型压力,并减少稳定性分析的计算时间.
科学领域:
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
- 复合材料 复合材料 复合材料
背景情况:
- 复合板材在各种工程应用中至关重要.
- 预测曲稳定性对于结构完整性至关重要.
- 现有的模型通常需要剪切校正因子,使分析复杂化.
研究的目的:
- 开发和验证一个更高阶的剪切和正常变形理论 (HSNDT) 来分析MWCNT增强复合材料层材的曲特性.
- 通过结合厚度效应和特定应力配置文件,消除了对剪切校正因子的需求.
- 为全面的参数研究创建一个高效的有限元模型.
主要方法:
- 使用了一种新的混合HSNDT,结合了多项式和夸张式函数.
- 哈尔 - 柴方案被用来使MWCNT增强复合材料的机械性能均化.
- 在 MATLAB 中使用 C0 连续性九节点拉格朗的同参形状函数开发了一个有限元模型.
- 几何非线性和线性刚度矩阵是通过虚拟工作原理衍生出来的.
主要成果:
- 开发的HSNDT准确地预测了复合板的临界屈曲负荷.
- 该模型成功地确保了抛物线切割应力配置文件和边界的零切割应力.
- 融合研究和与文献的比较验证了模型的效率和准确性.
- 该模型的减少的自由度显著减少计算时间.
结论:
- 新的HSNDT提供了一种准确而有效的方法来分析MWCNT增强复合材料板材的屈曲稳定性.
- 开发的有限元模型促进了对曲行为进行广泛的参数调查.
- 这项研究为设计轻量级和坚固的复合结构提供了有价值的工具.
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