Enhanced vehicle light weighting and safety through tailored hot stamping

通过定制热冲压增强车辆轻量化和安全性

• 批准号: 491010-2015
• 负责人: Worswick, Michael
• 金额: $ 4.69万
• 依托单位: University of Waterloo
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2019
• 资助国家: 加拿大
• 起止时间: 2019-01-01 至 2020-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=691298
• 关键词: Enhanced; vehicle; light; weighting; safety

The proposed research will address the fundamental material characterization and model development required to introduce tailored hot stamping processes to fabricate automotive crash energy-absorbing frontal structure components. Hot stamping has been adopted extensively to fabricate side impact protective structures (b-pillars, side sills, door beams) due to the inherent ultra-high strength (1,500 MPa) resulting from this process. The current research will consider tailoring of hot stamped components thereby introducing local softer regions of high strength (up to 1,000 MPa) but greater ductility, thereby enabling this process to produce components able to absorb crash energy in local "tailored" regions. The research will characterize the local microstructure, properties and failure characteristics of properties of parts tailored using: (i) in-die (IDH) heating to control local quench rates and resulting properties; and, (ii) tailor welded blanks (TWBs). Numerical models of the crash behaviour of these two classes of tailored parts will be developed. As a final validation, a demonstrator structure will be developed that captures the frontal crash response of a commercial front end structure. The front rail component will be replaced with a light weighted version fabricated using tailored hot stamping. The crash response of this structure will be measured and the model predictions will be assessed/validated against the experiments.

拟议的研究将介绍引入量身定制的热冲压工艺所需的基本材料表征和模型开发，以制造汽车崩溃的额叶结构组件。由于此过程的固有的超高强度（1,500 MPa），因此已广泛采用热冲压来制造侧面冲击保护结构（B柱，侧窗帘，门梁）。当前的研究将考虑对热盖组件的裁缝，从而引入高强度（最高1,000 MPa）但更大的延性区域的本地较软区域，从而使该过程能够产生能够在局部“量身定制”区域吸收崩溃能量的组件。该研究将表征使用以下方式量身定制的零件的局部微观结构，性质和故障特征：（i）in-die（idh）加热以控制局部淬火速率和产生的特性； （ii）量身定制焊接空白（TWB）。将开发这两类定制零件的崩溃行为的数值模型。作为最终验证，将开发出示威者结构，以捕获商业前端结构的正面崩溃响应。前轨组件将用使用量身定制的热冲压制造的轻巧版本代替。将测量该结构的崩溃响应，并根据实验对模型预测进行评估/验证。