不同取向角度、尺寸、表面粗糙度和热养护对基于粉末的3D打印中含/不含玻璃纤维的3D打印水泥砂浆力学性能的影响。
Effects of Different Orientation Angle, Size, Surface Roughness, and Heat Curing on Mechanical Behavior of 3D Printed Cement Mortar With/Without Glass Fiber in Powder-Based 3DP.
作者信息
Shakor Pshtiwan, Nejadi Shami, Paul Gavin, Gowripalan Nadarajah
机构信息
School of Civil and Environmental Engineering, University of Technology Sydney, Sydney, Australia.
School of Mechanical and Mechantronic Engineering, University of Technology Sydney, NSW, Australia.
出版信息
3D Print Addit Manuf. 2023 Apr 1;10(2):330-355. doi: 10.1089/3dp.2021.0067. Epub 2023 Apr 12.
Powder-based (inkjet) three-dimensional printing (3DP) technology presents great promise in the construction industry. The capacity to build complex geometries is one of the most appealing features of the process without formwork. This article focuses on the vital aspect of using a modified powder (CP) instead of commercial powder (ZP 151). It also discusses the effects of the size of specimens and the curing process of 3DP specimens. This article presents not only the improved mechanical properties of the mortar that are revealed through a heat-curing procedure but also the properties of the reinforced mortar with chopped glass fibers. Experiments are conducted on cubic printed mortar specimens and cured in an oven at different temperature regimes. Tests show that 80°C is the optimum heat-curing temperature to attain the highest compressive and flexural strength of the specimens. The orientation angle has a significant effect on the mechanical behavior of printed specimens. Therefore, specimens are prepared by printing at different orientation angles to compare the mechanical properties of common construction materials. Powder-based 3DP has three planes (, , and ) along which a load can be applied to the specimen. The mechanical strength in each direction across each plane is different, making it an anisotropic material. For CP specimens, the highest compressive strength was obtained using a 0° rotation in the printing orientation of the plane. For shear strength, a 45° orientation gave the optimum result, while for tensile and flexural strength, a 0° orientation provided the highest values. The optimum strength for ZP 151 specimens in compression, shear, tension, and bending was obtained by printing with orientation angles of 0°, 30°, 0°, and 0°, respectively. Finally, laser scanning of the printed specimens has been conducted so the surface roughness profiles for the 3DP specimens of ZP 151 and CP can be compared and presented.
基于粉末（喷墨）的三维打印（3DP）技术在建筑行业展现出巨大潜力。构建复杂几何形状的能力是该无模板工艺最具吸引力的特性之一。本文聚焦于使用改性粉末（CP）而非商用粉末（ZP 151）这一关键方面。它还讨论了试件尺寸和3DP试件养护工艺的影响。本文不仅展示了通过热养护程序揭示的砂浆力学性能的改善，还展示了含短切玻璃纤维增强砂浆的性能。对立方体型打印砂浆试件进行实验，并在不同温度条件的烘箱中养护。试验表明，80°C是获得试件最高抗压强度和抗弯强度的最佳热养护温度。取向角对打印试件的力学性能有显著影响。因此，通过以不同取向角打印来制备试件，以比较常用建筑材料的力学性能。基于粉末的3DP有三个平面（、和），沿这些平面可对试件施加荷载。每个平面上各个方向的力学强度不同，使其成为各向异性材料。对于CP试件，在平面的打印取向中使用0°旋转可获得最高抗压强度。对于抗剪强度，45°取向给出最佳结果，而对于抗拉强度和抗弯强度，0°取向提供最高值。ZP 151试件在压缩、剪切、拉伸和弯曲方面的最佳强度分别通过0°、30°、0°和0°的取向角打印获得。最后，对打印试件进行了激光扫描，以便比较并呈现ZP 151和CP的3DP试件的表面粗糙度轮廓。
Zotero 插件