受限机械超材料能取代粘合剂吗？
Can confined mechanical metamaterials replace adhesives?
摘要：
机械超材料的研究受到了广泛的关注，但其广泛应用仍处于停滞状态。这些材料通常被认为是独立的，相对于所有特征长度尺度仅与材料本身的几何形状相关联。在这项工作中，我们提出了新的应用机械超材料的界面区域连接两种材料的潜力，取代散装粘合剂。这个想法导致了超材料和粘合剂接头的范式转变。具体地说，我们概述了在断裂力学框架内测试和评估受限晶格材料的方法。理论和数值方法交织，揭示了一组关键参数，需要考虑在设计过程中。拉伸和弯曲为主的晶格进行了探索，并提出了故障图，表示敏感性取决于一定的故障模式的水平的限制和特征尺寸的每个晶格的单元格。
英文摘要：
The subject of mechanical metamaterials has been gaining significant attention, however, their widespread application is still halted. Such materials are usually considered as stand-alone, vis-à-vis all characteristic length scales being associated solely with geometry of material itself. In this work we propose novel application of mechanical metamaterials as interface regions joining two materials with potential of replacing bulk adhesives. This idea leads into paradigm shifts for both metamaterials and adhesive joints. In specific, we outline methodology for testing and evaluating confined lattice materials within fracture mechanics framework. The theoretical and numerical approaches are inter-winded, revealing a set of critical parameters that needs to be considered during design process. Lattices that are stretching and bending dominated are explored and failure maps are proposed, indicating susceptibility to a certain failure mode depending on level of confinement and characteristic dimension of each lattice's unit cells.
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