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Additively Manufactured Mechanical Metamaterials for Blast and Impact Protection

用于爆炸和冲击防护的增材制造机械超材料

基本信息

批准号：
2275443
负责人：
金额：
--
依托单位：
University of Cambridge
依托单位国家：
英国
项目类别：
Studentship
财政年份：
2019
资助国家：
英国
起止时间：
2019 至无数据
项目状态：
已结题

来源：
https://gtr.ukri.org/projects?ref=studentship-2275443
关键词：
Additively Manufactured Mechanical Metamaterials Blast

项目摘要

Additive Manufacturing presents new opportunities for the design of high performance cellular materialsfor impact energy absorption. Recent research has demonstrated the performance potential of metalliccellular materials produced using Selective Laser Melting AM processes under high strain rate loadingconditions. The proposed project will pursue two novel areas of research: (1) AM processing of cellularmaterials containing Shape Memory Alloy, and (2) application of this understanding to develop smartimpact energy absorbing materials capable of configurational change. Two novel and challengingapplication areas are anticipated within the Space Industry: (a) reusable energy absorbers for vehiclelanding impacts; (b) self-healing protection against space debris impact. The research will be carried outas a PhD project, consisting of two phases. (1) Extend current understanding of the coupling betweencellular geometry, AM processing parameters and high strain rate mechanical properties to SMA. Resultsfor SMA will be compared with more established alloys. (2) Develop strategies for the design of AMcellular materials incorporating SMA, that achieve both effective impact protection and geometryreconfiguration. This will consider any trade-off between these functions, and design optimisation. Theresearch will focus first on impact scenarios relevant for application (a), and will then be extended toconsider the significantly higher impact velocity regime of application (b).

增材制造为设计用于冲击能量吸收的高性能蜂窝材料提供了新的机会。最近的研究已经证明了在高应变率加载条件下使用选择性激光熔化AM工艺生产的金属蜂窝材料的性能潜力。该项目将致力于两个新的研究领域：（1）含有形状记忆合金的细胞材料的AM处理，以及（2）应用这种理解来开发能够改变构型的智能冲击能量吸收材料。预计在航天工业中有两个新颖和具有挑战性的应用领域：（a）可重复使用的用于防止航天器着陆撞击的能量吸收器;（B）防止空间碎片撞击的自愈保护。该研究将作为博士项目进行，包括两个阶段。(1)扩展目前对SMA的细胞几何形状、AM工艺参数和高应变率力学性能之间的耦合的理解。SMA的结果将与更成熟的合金进行比较。(2)制定战略的AM蜂窝材料的设计纳入SMA，实现有效的冲击保护和几何重构。这将考虑这些功能之间的任何权衡和设计优化。研究将首先集中于与应用（a）相关的撞击情景，然后将扩展到考虑应用（B）的显著更高的撞击速度状态。