Mohan Shashi Ranjan, Khaderi Syed Nizamuddin, Simhambhatla Suryakumar
Department of Mechanical and Aerospace Engineering, Indian Institute of Technology, Hyderabad, India.
3D Print Addit Manuf. 2020 Dec 1;7(6):288-299. doi: 10.1089/3dp.2020.0048. Epub 2020 Dec 16.
Owing to the localized line-by-line and layer-by-layer style of material deposition, 3D printing remains an ideal candidate for fabrication of components with tailored properties (also referred to as functionally gradient components). The present work tries to exploit this advantage, in the extrusion-based 3D printing process, to fabricate components with varying set of properties at different locations. The implementation is done using Hilbert area-filling curves with the displacement per unit force (i.e., compliance) applied being the property varying in a gradient manner. Four input parameters have been considered to study their effect on the compliance, and the single most influencing parameter has been selected using analysis of variance (ANOVA) for further study. Mapping of a selected input variable on the desired property has been discussed through numerical and experimental tests. Based on these studies, a demonstrative case study of a shoe sole has been designed and fabricated. Deflections of the fabricated component have been measured at different locations for uniform loading conditions. The deflection behavior of the fabricated component is found to be in line with the gradient force response required, thus validating the proposed approach. The current study is intended to provide the basic framework for fabrication of components tailored for force response using Hilbert curves.
由于材料沉积是逐行逐层的局部化方式，3D打印仍然是制造具有定制特性（也称为功能梯度部件）部件的理想选择。本研究试图在基于挤出的3D打印过程中利用这一优势，以制造在不同位置具有不同特性集的部件。通过使用希尔伯特面积填充曲线来实现这一点，所施加的单位力位移（即柔度）作为以梯度方式变化的特性。考虑了四个输入参数来研究它们对柔度的影响，并使用方差分析（ANOVA）选择了最具影响力的单个参数进行进一步研究。通过数值和实验测试讨论了选定输入变量在所需特性上的映射。基于这些研究，设计并制造了一个鞋底的示范案例。在均匀加载条件下，测量了制造部件在不同位置的挠度。发现制造部件的挠曲行为与所需的梯度力响应一致，从而验证了所提出的方法。当前的研究旨在为使用希尔伯特曲线制造针对力响应定制的部件提供基本框架。
