Abstract Dense architectured materials are made of blocks that can slide, rotate, interlock and jam in powerful mechanisms that can generate simultaneous strength and toughness. Nature abounds of examples of such architectured materials, for example in the segmented structure of vertebrate spines. In this study we consider segmented beams made of stiff blocks and submitted to a transverse force. We start with simple cubes as a geometrical reference, which we then enrich by using two-dimensional polynomial functions. The flexural response of the beam is simulated using finite element modeling (FE-model) to predict strength, toughness and maximum local stresses. Using this procedure we identified the most efficient interface geometries and interlocking mechanisms within a set of polynomial functions and for a given strength of the individual blocks. To illustrate these results, we fabricated segmented beams of ceramic glass using a laser engraver. Experiments on these architectured glass revealed how enriched blocks turned the catastrophic brittle failure of monolithic glass into graceful progressive deformation. Resulting in a tougher response than the monolithic by 370 times and preserved 40% of strength of that of the monolithic. ⁎Corresponding author.

中文翻译：

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操纵结构梁的几何形状以获得最大的韧性和强度

摘要 致密的建筑材料由块体制成，这些块体可以在强大的机制中滑动、旋转、互锁和卡住，这些机制可以同时产生强度和韧性。自然界中有很多此类建筑材料的例子，例如脊椎动物脊椎的分段结构。在这项研究中，我们考虑由刚性块制成并受到横向力的分段梁。我们从简单的立方体作为几何参考开始，然后我们通过使用二维多项式函数对其进行丰富。梁的弯曲响应使用有限元模型（FE 模型）进行模拟，以预测强度、韧性和最大局部应力。使用此程序，我们确定了一组多项式函数中最有效的界面几何形状和互锁机制，并且对于单个块的给定强度。为了说明这些结果，我们使用激光雕刻机制造了陶瓷玻璃的分段光束。对这些建筑玻璃的实验揭示了富集块如何将整体玻璃的灾难性脆性破坏转变为优雅的渐进变形。导致比整体结构更坚固的响应 370 倍，并保持整体结构强度的 40%。⁎通讯作者。