Enhanced compressive properties of additively manufactured hollow sphere materials with novel configurations

• DOI: 10.1016/j.matdes.2024.112909
• Publication Date: 2024-04-03T22:05:45Z
• Authors: Meiling Dai; Zhuoli Chen; Weiyi Hu; Cheng Cheng; Zhongyu Lu
• Keywords: Ellipsoid; Perforation; Aspect ratio (aeronautics); Relative density

Based on the porous structure of classic simple-cubic hollow sphere (SHS) materials, two novel configurations—simple-cubic perforated (SPHS) and ellipsoidal (SHES) structures were designed by introducing perforations in walls altering ellipsoid ratio, defined as ratio major minor axes an ellipsoid. Using 316L stainless steel raw material, a series specimens fabricated employing additive manufacturing technology. Corresponding finite element models established using Abaqus. Then experimental numerical investigations conducted to analyze deformation behavior these subjected quasi-static compression. Further research was mechanical properties multi-cell with varied parameters, including wall thickness, perforation diameter, ratio. The results confirmed that diameter 4 mm resulted optimal performance for SPHS. In comparison basic SHS identical relative density, this configuration exhibited 60 % higher specific yield strength. Additionally, SHES, when exceeded 1 while less than 1.8, strength demonstrated maximum increase 69 ∼ 105 enhancement energy absorption 85 %.