Although several analytical models for the prediction of mechanical properties for truncated octahedron and cubic diamond lattices are available in the literature, no validation has been previously reported for most of them. In the present study, different analytical models were compared to results from compression tests of lattice structures built by material extrusion additive manufacturing, to determine their validity. For truncated octahedron lattices the relative error in geometry-based analytical models was significant, while models based on relative density showed better accuracy. In cubic diamond lattices, the relative error of the models was substantial, although performance improved for relative density values under 0.1. Discrepancies between the assumptions in the analytical models and the fabricated samples, in addition to size and edge effects were identified as possible sources of the large error margins observed. A second approach based on scaling laws was explored, and models for plateau stress and elastic modulus were obtained for both lattice structures, confirming its capabilities as an effective tool for the prediction of mechanical properties. Scaling laws and other models based on experimental data seem promising for the design of additive manufacturing lattice structures with a higher relative density, while further evaluation and development of the analytical models is considered necessary.

尽管在文献中提供了几种用于预测截断八面体和立方金刚石晶格的机械性能的分析模型，但之前没有报道过对它们中的大多数进行验证。在本研究中，将不同的分析模型与通过材料挤出增材制造构建的晶格结构的压缩测试结果进行比较，以确定它们的有效性。对于截断八面体晶格，基于几何的分析模型中的相对误差很大，而基于相对密度的模型显示出更好的准确性。在立方金刚石晶格中，模型的相对误差很大，尽管相对密度值低于 0.1 时性能有所提高。分析模型中的假设与制造的样品之间的差异，除了尺寸和边缘效应之外，还确定了观察到的大误差幅度的可能来源。探索了基于标度定律的第二种方法，并获得了两种晶格结构的平台应力和弹性模量模型，证实了其作为预测机械性能的有效工具的能力。基于实验数据的缩放定律和其他模型对于设计具有更高相对密度的增材制造晶格结构似乎很有希望，而分析模型的进一步评估和开发被认为是必要的。确认其作为预测机械性能的有效工具的能力。基于实验数据的缩放定律和其他模型对于设计具有更高相对密度的增材制造晶格结构似乎很有希望，而分析模型的进一步评估和开发被认为是必要的。确认其作为预测机械性能的有效工具的能力。基于实验数据的缩放定律和其他模型对于具有更高相对密度的增材制造晶格结构的设计似乎很有希望，而分析模型的进一步评估和开发被认为是必要的。