Multimaterial additive manufacturing is an enabling tool for exploring difficult to access structure–property relationships. In this work, a recently developed multimaterial printing approach, solution mask liquid lithography, is used to produce porous polymer–polymer composites inspired by tough, hierarchical structures found in nature. The results demonstrate that varying the size and packing of pores in the core structure leads to significant enhancement in crack deflection. Finite element analysis reveals that this enhancement is linked to geometry-dependent stress distribution.

中文翻译：

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通过有序孔工程印刷聚合物-聚合物复合材料的龟裂曲折度

多材料增材制造是探索难以访问的结构－属性关系的一种使能工具。在这项工作中，最近开发的一种多材料印刷方法，即溶液掩膜液体光刻技术，被用于生产多孔聚合物-聚合物复合材料，该复合材料受到自然界中坚韧的分层结构的启发。结果表明，改变芯结构中孔的大小和堆积会导致裂纹变形的显着增强。有限元分析表明，这种增强与几何相关的应力分布有关。