Lattice structures are candidates for innovative design of orthopedic implants and other highly functional products. In particular, functionally graded structures can be employed to achieve the required strength and stiffness for optimal stress-strain distribution. Prediction of the real behavior of these structures is essential for effective design. In the present work, stiffness prediction and deformation analysis of Cobalt-Chromium lattice structures manufactured using laser-based Powder Bed Fusion additive manufacturing were carried out. The study was developed in two steps: compressive tests and Digital Image Correlation were performed on periodic structures, with the results used to predict the stiffness of two types of functionally graded structures. The proposed method was validated experimentally, with the predicted stiffness of structures designed with the proposed elementary units within 6.1% for all tested cases. An array of stiffness data was then defined to allow free design of graded structures foreseeing specific compressive properties. The mechanical properties and deformation behavior of the structures were also investigated, with the local strain distribution mapped and compared to global deformation values.

晶格结构是骨科植入物和其他高功能产品创新设计的候选者。特别地，可以采用功能梯度结构来获得所需的强度和刚度，以实现最佳的应力应变分布。这些结构的实际行为的预测对于有效的设计至关重要。在目前的工作中，进行了使用激光基粉末床熔合增材制造的钴铬晶格结构的刚度预测和变形分析。该研究分两个步骤进行：对周期性结构进行压缩测试和数字图像关联，其结果可用于预测两种类型的功能梯度结构的刚度。实验验证了该方法的有效性，在所有测试情况下，使用建议的基本单位设计的结构的预计刚度在6.1％以内。然后定义了一系列的刚度数据，以允许自由设计渐变结构，以预见特定的压缩特性。还研究了结构的机械性能和变形行为，绘制了局部应变分布，并将其与整体变形值进行了比较。