Aslan Mustafa, Çava Kutay, Uşun Altuğ, Güler Onur
Metallurgical and Materials Engineering, Karadeniz Technical University, 61080 Trabzon, Turkey.
Medical Device Design and Production Application and Research Center, Karadeniz Technical University, 61080 Trabzon, Turkey.
Polymers (Basel). 2024 Dec 24;17(1):2. doi: 10.3390/polym17010002.
The introduction of 3D printing technology has broadened manufacturing possibilities, allowing the production of complex cellular geometries, including auxetic and curved plane structures, beyond the standard honeycomb patterns in sandwich composite materials. In this study, the effects of cell design parameters, such as cell geometry (honeycomb and auxetic) and cell size (cell thickness and width), are examined on acrylonitrile butadiene styrene (ABS) core materials produced using fusion deposition modeling (FDM). They are produced as a result of the epoxy bonding of carbon epoxy prepreg composite materials to the surfaces of core materials. Increasing the wall thickness from 0.6 mm to 1 mm doubled the elastic modulus of the re-entrant structures (5 GPa to 10 GPa) and improved compressive strength by 50-60% for both geometries. In contrast, increasing cell size from 6 mm to 10 mm significantly reduced compressive strength by 80% (from 2.5-2.8 MPa to 0.5-0.6 MPa) and elastic modulus by 70-78% (from 9-10 GPa to 2-3 GPa). Flexural testing showed that the re-entrant cores, with a maximum load capacity of 148 N, exhibited more uniform deformation, while the honeycomb cores achieved a higher load capacity of 273 N but were prone to localized failures. These findings emphasize the directional anisotropy and specific advantages of auxetic and honeycomb designs, offering valuable insights for lightweight, high-strength structural applications.
3D打印技术的引入拓宽了制造可能性，能够生产复杂的蜂窝结构，包括负泊松比结构和曲面结构，而不仅仅局限于三明治复合材料中的标准蜂窝图案。在本研究中，研究了细胞设计参数的影响，如细胞几何形状（蜂窝状和负泊松比）和细胞大小（细胞厚度和宽度），对使用熔融沉积建模（FDM）生产的丙烯腈丁二烯苯乙烯（ABS）芯材的影响。它们是通过将碳环氧预浸料复合材料与芯材表面进行环氧粘结而制成的。将壁厚从0.6毫米增加到1毫米，使凹腔结构的弹性模量增加了一倍（从5吉帕增加到10吉帕），两种几何形状的抗压强度均提高了50%-60%。相比之下，将细胞大小从6毫米增加到10毫米，抗压强度显著降低了80%（从2.5-2.8兆帕降至0.5-0.6兆帕），弹性模量降低了70%-78%（从9-10吉帕降至2-3吉帕）。弯曲测试表明，最大承载能力为148牛的凹腔芯表现出更均匀的变形，而蜂窝芯的承载能力更高，为273牛，但容易出现局部失效。这些发现强调了负泊松比和蜂窝设计结构中的方向各向异性和特定优势，为轻质、高强度结构应用提供了有价值的见解。
需注意，原文中“细胞设计参数”在语境里可能是“蜂窝结构设计参数”的错误表述，但按照要求未做修改直接翻译。
