Local mechanical properties of thin parts produced by additive manufacturing

增材制造生产的薄零件的局部机械性能

基本信息

批准号：
563133-2021
负责人：
Brochu, MathieuM
金额：
$ 1.46万
依托单位：
McGill University
依托单位国家：
加拿大
项目类别：
Alliance Grants
财政年份：
2022
资助国家：
加拿大
起止时间：
2022-01-01 至 2023-12-31
项目状态：
已结题

来源：
https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=761062
关键词：
Local mechanical properties thin parts

项目摘要

Additive manufacturing (AM) by selective laser fusion on powder bed (LPBF) will increase its industrial growth with the manufacturing of parts that have sensors and maximum topological optimization. A frequent result of topological optimization is the inclusion of thin sections (walls, rods) in the designs. During their manufacturing, these sections have a different thermal evolution, inducing different microstructures which consequently will produce different mechanical responses. It is therefore essential to measure the actual mechanical properties of such sections in parts made by AM, in order to maximize the quality of the design.As a result, AP&C joined the team of Prof. Brochu for the establishment of a research project aimed at studying the mechanical properties of thin samples from parts made by LPBF. The protocols for the mechanical evaluation of such samples developed by the team of Prof. Brochu will be used on heat exchanger sections and mesh structures manufactured by AP&C. This project will make it possible to obtain true values of mechanical tensile and fatigue strength of these sections.The importance of these results is critical for AP&C, firstly to better understand the modalities and particularities of testing on small sample sizes. The second benefit will be to be able to use these results as a design limit, which will allow to have more precise design tools for additive manufacturing.

通过粉末床选择性激光熔合 (LPBF) 进行的增材制造 (AM) 将通过制造带有传感器和最大拓扑优化的零件来促进其工业增长。拓扑优化的一个常见结果是在设计中包含薄截面（壁、杆）。在制造过程中，这些部分具有不同的热演化，从而产生不同的微观结构，从而产生不同的机械响应。因此，有必要测量增材制造零件中此类截面的实际机械性能，以最大限度地提高设计质量。因此，AP&C 加入了 Brochu 教授的团队，建立了一个研究项目，旨在研究 LPBF 制造的零件薄样品的机械性能。 Brochu 教授团队开发的此类样品机械评估协议将用于 AP&C 制造的热交换器部分和网状结构。该项目将使获得这些部分的机械拉伸和疲劳强度的真实值成为可能。这些结果的重要性对于 AP&C 至关重要，首先是为了更好地了解小样本测试的模式和特殊性。第二个好处是能够使用这些结果作为设计限制，这将为增材制造提供更精确的设计工具。