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.

通过在粉末床（LPBF）上选择性激光融合的添加剂制造（AM）将通过具有传感器和最大拓扑优化的零件的制造来增加其工业生长。拓扑优化的经常结果是在设计中包含薄部分（壁，杆）。在制造过程中，这些部分具有不同的热演化，诱导了不同的微观结构，从而产生不同的机械响应。因此，为了最大程度地提高设计质量，AP＆C与Brochu教授团队一起建立了一个旨在研究薄薄样品的机械性能的研究项目，因此必须测量AM制造的部分中此类部分的实际机械性能。 Brochu教授团队开发的此类样本的机械评估方案将用于由AP＆C制造的热交换器部分和网格结构。该项目将有可能获得这些部分的机械拉伸和疲劳强度的真实价值。这些结果的重要性对于AP＆C至关重要，首先要更好地了解小样本量的测试方式和特殊性。第二个好处是能够将这些结果用作设计限制，这将允许具有更精确的设计工具用于增材制造。