按需辅助性和同时存在的前应力诱导压缩阶段在一个三明治设计中,具有动力受约束的3D接
1Department of Mechanical and Industrial Engineering, Northeastern University, Boston, MA, 02215, USA.
Nature communications
|August 14, 2024
概括
新的状三明治复合材料表现出可调节的辅助性和前应力诱导压缩 (PIC),实现了广泛的Poisson.
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:
- 辅助性材料表现出负波桑比率,在拉伸时横向膨胀.
- 瓦式三明治复合材料提供可调节的机械性能.
- 预应力诱导压缩 (PIC) 可以提高材料在负载下的性能.
研究的目的:
- 设计和研究带有按需辅助性行为的板三明治复合材料.
- 探索辅助性和PIC之间的协同作用,以提高机械性能.
- 为了实现波桑比率 (-∞, +∞) 的广泛,可调节的范围.
主要方法:
- 整合了辅助性概念,动力学约束,PIC,和纹模板的整合.
- 通过分析,数值和实验方法进行系统的探索.
- 在3D打印标本上进行机械实验.
主要成果:
- 通过值应变引发的辅助性和PIC之间的协同作用.
- 在需要时在 (-∞, +∞) 范围内实现波桑比率,在大变形下稳定.
- 确定了牙面积比和斜度对约束角度,辅助性和强度的显著影响.
结论:
- 设计的状三明治复合材料具有可控的辅助性和PIC.
- PIC阶段确保负载分配,软层承受紧张,瓦片承受压缩.
- 牙几何是调整这些复合材料机械反应的关键因素.
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