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生物灵感填充空间的碎形元材料
1Department of Mechanical and Industrial Engineering, Northeastern University, Boston, USA.
Journal of the mechanical behavior of biomedical materials
|November 2, 2024
概括
生物启发的碎形元材料的复杂性越来越高,显示出增强的刚性,强度和性. 艰难的阶段 艰难的阶段
科学领域:
- 材料科学与工程 材料科学与工程
- 机械工程 机械工程
- 生物灵感设计 生物灵感设计
背景情况:
- 哺乳动物的部部表现出时空形态变异,激发了新材料设计的灵感.
- 分形几何学为创建复杂的等级结构提供了一个框架.
- 超材料具有在自然存在的材料中找不到的工程特性.
研究的目的:
- 设计和制造两相空间填充的碎形超材料,灵感来自部.
- 为了评估不同复杂度的这些超材料的机械性能.
- 了解结构层次和机械性能之间的关系.
主要方法:
- 生物灵感设计的两相填充空间的碎形超材料,具有层次数字N.
- 使用多种材料聚合物喷射制造.
- 机械测试 (拉力测试) 和有限元素 (FE) 模拟.
主要成果:
- 增加等级数N增强了拉力负载下的刚性,强度和性.
- FE模拟显示,硬阶段越来越多地为更高N的应变能量密度做出了贡献.
- 整体机械性能主要取决于硬相的体积分数和刚度比.
结论:
- 层次复杂性是调整这些超材料的机械行为的一个关键因素.
- 硬相的特性和分量是优化机械性能的关键设计参数.
- 在工程应用中,生物灵感的碎形元材料显示出对能量消耗,冲击减轻和损坏减缓的承诺.
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