Abstract This work focuses on the synthesis of brittle foams with controlled morphological characteristics, measurements of their crushing strength and its connection to the cellular microstructure. Tessellation-based topologies are used to generate realistic microstructures of open-cell foams that are subsequently 3D-printed by stereolithography. The brittle material behavior and fracture strength of the base photopolymer are measured using tensile tests on small dog-bone specimens with the dimensions of foam ligaments. Synthesized foams are scanned by microcomputed tomography and manufacturing-induced variations are quantified through image analysis. Characterization shows that there is a small amount of volume shrinkage of the material caused by the additive manufacturing process, but all other microstructural features are accurately reproduced. We then perform a series of experiments to measure the compressive response and strength of the 3D-printed foams and connect it to load-transferring conditions, the strength of the base solid material and the foam relative density.

中文翻译：

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脆性泡沫的增材制造和表征

摘要 这项工作的重点是合成具有受控形态特征的脆性泡沫，测量其抗碎强度及其与多孔微观结构的联系。基于曲面细分的拓扑结构用于生成开孔泡沫的真实微结构，随后通过立体光刻 3D 打印。基础光聚合物的脆性材料行为和断裂强度是通过对具有泡沫韧带尺寸的小型狗骨样品进行拉伸试验来测量的。合成泡沫通过显微计算机断层扫描进行扫描，制造引起的变化通过图像分析进行量化。表征表明，增材制造过程会导致材料出现少量体积收缩，但所有其他微观结构特征都得到了准确再现。