Data for: Mechanical performance of additively manufactured lightweight cellular solids: influence of cell pattern and relative density on the printing time and compression behavior

A dataset for the publication: Mechanical performance of additively manufactured lightweight cellular solids: influence of cell pattern and relative density on the printing time and compression behavior Albert Forés-Garriga, Giovanni Gómez-Gras, Marco A. Pérez* Materials & Design, 2022 A comprehensive investigation is presented on the Fused Filament Fabrication (FFF) technology’s possibilities to create cellular solids with a broad spectrum of specific stiffness and strength, modifying cell geometry and size, while addressing manufacturing matters such as inherent defects and built time. Thirteen typologies of two-dimensional cellular patterns with different relative densities are examined. Results have allowed conclusions to be drawn regarding the influence of cell type and infill density on mechanical performance. Intra-layer and inter-layer inherent defects identified after manufacturing highlight the importance of optimizing filament trajectories. A reliable comparison of the elastic properties of the cellular patterns as a function of their density is presented. An experimentally validated numerical model is provided for predicting the compression stiffness of the different cell patterns with an average deviation below 5%. The model can reproduce the behavior in the elastic range based on tensile specimen properties and a Normal Stiffness Factor to account for the phenomenon of elastic asymmetry of the FFF print samples. The wide range of results achieved is experimental confirmation of the potential of FFF cellular solids. Lastly, this investigation provides analytical, numerical, and empirical validated evidence to further design-for-additive manufacturing strategies with cellular solids for designing advanced lightweight structures. This dataset contains: - TEST Files: Compression test files and Digital Image Correlation (DIC) data in .txt files. - STL Files: 3D models for manufacturing the samples. - MICROSCOPY Files: Manufacturing defects inspection and thickness measurements. - DIC PATTERN INSPECTION Files: Digital microscopy images to validate the quality and properties of DIC stochastic pattern.本数据集配套发表论文：《增材制造轻质胞状固体的力学性能：胞元构型与相对密度对打印时长及压缩行为的影响》，作者Albert Forés-Garriga、Giovanni Gómez-Gras、Marco A. Pérez*，发表于《Materials & Design》，2022年。 本研究围绕熔融沉积成型（Fused Filament Fabrication, FFF）技术展开系统性探究，通过调整胞元几何形状与尺寸，制备出具备宽范围比刚度与比强度的胞状固体，同时探讨了成型过程中的固有缺陷、打印时长等制造相关问题。本研究共考察了13种不同相对密度的二维胞元构型。 研究结果可用于推导胞元类型与填充密度对力学性能的影响规律。成型后检测到的层内与层间固有缺陷，凸显了优化丝材沉积路径的重要性。本研究提供了可靠的胞元构型弹性性能随密度变化的对比分析。同时，本研究提出了经实验验证的数值模型，可预测不同胞元构型的压缩刚度，平均偏差低于5%。该模型基于拉伸试样的力学性能与用于描述FFF打印样品弹性不对称现象的法向刚度因子（Normal Stiffness Factor），可复现弹性范围内的力学行为。本研究获得的大量实验结果验证了FFF制备胞状固体的应用潜力。最后，本研究提供了经分析、数值与实验验证的依据，可为采用胞状固体的面向增材制造设计策略提供支撑，助力先进轻质结构的设计工作。 本数据集包含以下内容： - 测试文件（TEST Files）：压缩测试文件与数字图像相关（Digital Image Correlation, DIC）数据，格式为.txt。 - STL文件（STL Files）：用于制备试样的三维模型。 - 显微分析文件（MICROSCOPY Files）：成型缺陷检测与厚度测量相关数据。 - DIC构型检测文件（DIC PATTERN INSPECTION Files）：用于验证DIC随机图案质量与性能的数字显微图像。