预压伤口复合材料组件的应力和变形分析,使用弧形金属板
Junsheng Wang1, Jun Xiao1, Dajun Huan1
1R&D Center for Composites Industry Automation, College of Material Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China.
Materials (Basel, Switzerland)
|April 9, 2024
概括
本研究介绍了一种物理模型和3D有限元 (FE) 模型,用于分析预应力丝绕复合材料组件中的应力和变形. 这些模型准确地预测了组件的行为,揭示了"额外的曲时刻效应".
科学领域:
- 复合材料工程 复合材料工程
- 机械工程 机械工程
- 结构分析 结构分析
背景情况:
- 在各种工程应用中,预应力丝绕组件至关重要.
- 了解应力分布对于部件质量和运行寿命至关重要.
- 与传统的圆形设计相比,形横截面带来了独特的分析挑战.
研究的目的:
- 开发和验证物理和计算模型,用于分析预应力丝绕复合材料组件中的应力和变形.
- 研究这些部件中"额外曲时刻效应"的现象.
- 为了确定额外曲矩与外部压力之间的关系.
主要方法:
- 束理论用于物理模型开发的应用.
- 为详细分析开发一个3D有限元 (FE) 模型.
- 对FE模型与预应力伤口实验进行实验验证.
- 与具有圆形截面的部件进行比较分析.
主要成果:
- 在形预应力伤口组件中发现了一种新的"额外曲时刻效应".
- 与实验数据相比,3D FE模型的准确性很高,错误率低于2%.
- 弧形元件的弧线段中的应力分布与圆形元件的应力分布非常相似 (差异在5%以内).
- 在特定的几何条件下 (直线段长度与内径比率<4) 提出了一种简化变形分析方法,用于形元件.
结论:
- 开发的模型提供了一种可靠的方法来分析具有形截面的预应力合元件.
- "额外的曲时刻效应"是受到外部压力影响的重要因素.
- 这些发现使形元件的简化分析和设计方法成为可能,提高了它们的结构完整性和性能.
相关概念视频
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