Integration of Materials Design and Manufacturing via Free Form Fabrication Processes

9400213 Ogale这项研究的目标是开发将材料设计与自由形式制造相结合的方法。设计将基于这样的假设，即产品可以通过将其分解成层来构建，然后通过自由形式的制造技术创建每一层。所设计的材料以及产品中的应力和应变等值线的知识将用于规划原型工艺。所需的表面轮廓和形状误差以及结构分析结果将决定层厚、每层中纤维的布局、光束直径、横移速度和聚合。设计方法将通过在自动光刻单元中处理部件来验证。一个连续的纤维分配装置将提供所需图案中的自动纤维放置和激光光束运动。纤维的原位添加将为研究两个基本问题提供机会，即光树脂对纤维表面的润湿和由于增强纤维的存在而阻碍光树脂固化的动力学。这项研究将提供有关液体前沿沿纤维表面运动的信息，并深入了解气-液-固界面上的“滑移”现象，它将有助于理解用于自由形式制造技术的多功能光树脂的固化机理。

9400213 Ogale The goal of this research is the development of methodologies for the integration of materials design with free form manufacturing. Design will be based on the assumption that the product can be built by decomposing it into layers, and then creating each layer by a free form manufacturing technique. Knowledge of the designed material and stress and strain contours in the product will be used to plan the prototyping process. Surface contour and form error desired, as well as structural analysis results will determine the layer thickness, layout of fibers in each layer, beam diameter, traverse speed and polymerization. The design methodologies will be validated by processing parts in an automated photolithography unit. A continuous fiber dispensing device will provide automatic fiber placement and laser beam motion in the required patterns. In situ addition of fibers will provide an opportunity for the investigation of two fundamental issues, wetting of the fiber surfaces by photoresins and the hindered cure kinetics of photoresins due to the presence of reinforcing fibers. This research will provide information about the movement of liquid fronts along fiber surfaces and give insight into the "slip" phenomenon at the gas-liquid-solid interface, and it will help in developing an understanding of the cure mechanisms in multifunctional photoresins that are used in free form manufacturing techniques.