Eryıldız, Meltem2023-02-022023-02-0220222602-4217https://search.trdizin.gov.tr/yayin/detay/1120891https://doi.org/10.26701/ems.1101832Sandwich structures are known as ultra-light porous materials. Because the structure has advantages in terms of acoustics, fatigue, and impact resistance that conventional stiffened plates cannot match, it has become a popular material in aerospace, automotive, marine, windmill, and architectural applications. One promising method for decreasing production waste and enhancing flexural stress is to employ additive manufacture (AM) technologies for sandwich structure manufacturing. In this study, polylactic acid (PLA), acrylonitrile butadiene styrene (ABS), and polyethylene terephthalate glycol (PETG) sandwich structures with reentrant and honeycomb cores were designed and then to compare the stress distributions in these sandwich composites, a finite element analysis (FEA) was used. According to the findings, higher flexure stresses and specific energy absorption were obtained in the reentrant sandwich structures compared to honeycomb sandwich structures. A minimum equivalent stress value was found in the ABS material, while a maximum equivalent stress value was found in the PLA material.enSandwich Structures3D printingFinite Element AnalysisThree-point BendingArticle10.26701/ems.11018321120891