Crystal-inspired approach is found to be highly successful in designing extraordinarily damage-tolerant architected materials. i.e. meta-crystals, necessitating in-depth fundamental studies to reveal the underlying mechanisms responsible for the strengthening in meta-crystals. Such understanding will enable greater confidence to control not only strength, but also spatial local deformation. In this study, the mechanisms underlying shear band activities were investigated and discussed to provide a solid basis for predicting and controlling the local deformation behaviour in meta-crystals. The boundary strengthening in polycrystal-like meta-crystals was found to relate to the interaction between shear bands and polygrain-like boundaries. More importantly, the boundary type and coherency were found to be influential as they govern the transmission of shear bands across meta-grains boundaries. The obtained insights in this study provide crucial knowledge in developing high strength architected materials with great capacity in controlling and programming the mechanical strength and damage path.

发现受晶体启发的方法在设计非常耐损坏的建筑材料方面非常成功。即超晶，需要深入的基础研究来揭示超晶强化的潜在机制。这种理解将使人们更有信心不仅控制强度，而且控制空间局部变形。在这项研究中，研究和讨论了剪切带活动的潜在机制，为预测和控制超晶中的局部变形行为提供了坚实的基础。发现类多晶超晶中的边界强化与剪切带和类多晶边界之间的相互作用有关。更重要的是，发现边界类型和相干性是有影响的，因为它们控制着跨变晶边界的剪切带的传输。本研究中获得的见解为开发具有强大控制和编程机械强度和损伤路径能力的高强度建筑材料提供了关键知识。