Structural Design of Path Strategy for Additive Manufacturing

增材制造路径策略的结构设计

• 批准号: 521757-2017
• 负责人: Kwok, TszHo
• 金额: $ 1.82万
• 依托单位: Concordia University
• 依托单位国家: 加拿大
• 项目类别: Engage Grants Program
• 财政年份: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=639432
• 关键词: Structural; Design; Path; Strategy; Additive

This proposed project in collaboration with Altair Engineering Canada aims at studying the toolpath generation for fused filament fabrication - an additive manufacturing (AM) technology. This research will apply structural topology optimization and incorporate the requirements of part elasticity and strength in the standard toolpath planning, so that a suitable internal geometry can be produced for a specific application.The majority of AM processes fabricate parts by CNC the tool path to fill and accumulate material in the solid. There are studies found that the way of filling determines the final mechanical properties of the part. In the proposed project, topology optimization will be extended to the design of filling patterns used in AM processes. The structural properties of different filling patterns will be studied and transferred to improve the performance of built parts. This research is focused on investigating the effects of the printer's toolpath on the mechanical response of the 3D printed part to static loading conditions. Inspired by a novel structural topology optimization method based on principal stress lines (PSL), an analysis of toolpath coinciding with principal stress lines will be conducted with the goal of minimizing the part's compliance and material usage. PSL is a brand-new method that extracts the design principles from mathematics formulations and converts the high-dimensional and computational expensive optimization to a geometric design problem, so that it can be performed very efficiently and it can provide explicit design control. A FFF printer will fabricate the designed parts for experimental validation and compare it with other filling patterns and materials.This project collaboration with Altair Engineering Canada is related to manufacturing research and is of importance to Montreal (Quebec), a top international centre for aerospace, automotive, and energy industries. The design and manufacturing knowledge gained in this project will be transferred to the supporting company and provide excellent training opportunities of future's HQP in Canada.

这项与加拿大Altair Engineering合作的拟议项目旨在研究熔丝制造的刀具路径生成--一种添加剂制造(AM)技术。本研究将应用结构拓扑优化，并将零件弹性和强度的要求纳入到标准刀具路径规划中，以便产生适合特定应用的内部几何形状。大多数AM工艺通过数控加工刀具路径来制造零件，以填充和积累实体中的材料。有研究发现，填充方式决定了零件的最终力学性能。在拟议的项目中，拓扑优化将扩展到AM流程中使用的填充模式的设计。将研究不同填充方式的结构性能，并将其转化为提高成型件性能的方法。本研究主要探讨打印机刀轨对3D打印件在静载条件下机械响应的影响。受一种新的基于主应力线(PSL)的结构拓扑优化方法的启发，以最小化零件柔度和材料用量为目标，对与主应力线重合的刀具路径进行分析。PSL是一种全新的方法，它从数学公式中提取设计原理，将高维、计算量大的优化问题转化为几何设计问题，从而可以非常高效地执行，并提供显式的设计控制。FFF打印机将制造用于实验验证的设计部件，并将其与其他填充模式和材料进行比较。该项目与加拿大Altair Engineering公司合作涉及制造研究，对魁北克蒙特利尔(魁北克)具有重要意义，蒙特利尔是航空航天、汽车和能源行业的顶级国际中心。在这个项目中获得的设计和制造知识将被转移到支持公司，并为未来的HQP在加拿大提供极好的培训机会。