Effect of strain and strain rate path on damage and fracture in light weight sheet and tube

拟议的研究将为基础材料和力学研究的进步提供急需的重点，这些研究需要开发与冲压和液压成形汽车车身部件及其在碰撞条件下的使用性能相关的总变形条件下的材料响应模型。这项研究将看到发展的国家的最先进的模型的韧性断裂过程和高应变率条件下的材料的响应。重点将放在汽车冲压和液压成形应用的轻质板材和管材的设计、加工和使用性能上。目标是优化可制造性，以及最佳的最终使用性能，以获得上级整体性能。这项研究的核心是需要了解材料在产品制造过程中大应变变形条件下的行为，以及在汽车碰撞事件期间经历的极端载荷。 拟议的发现补助金研究，加上申请人最近获得的加拿大研究主席，代表了一系列工业资助项目（每年约100万美元）中的核心材料和力学研究，这些项目将支持直接应用和转移这一核心科学到工业中。申请人很好地承担这项研究与冲压，液压成形，弯管，电磁成形，冲击测试和高应变率材料表征的主要基础设施。

The proposed research will provide a critically-needed focus for the advancement of the basic material and mechanics research required to develop models of material response under the gross deformation conditions associated with stamping and hydroforming of automotive body components and their in-service performance under crash conditions. The research will see development of state-of-the-art models of the ductile fracture process and the response of materials under high strain rate conditions. The focus will be on the design, processing and in-service performance of light weight sheet and tube for automotive stamping and hydroforming applications. The goal is optimization of manufacturability, coupled with optimal final in-service properties to obtain superior overall performance. Central to this research is the need to understand the behaviour of materials under the large-strain deformation conditions during product manufacture, as well as during the extreme loading experienced during an automotive crash event.      The proposed Discovery Grant research, coupled with a recently awarded Canada Research Chair held by the applicant, represents the core materials and mechanics research within a larger suite of industrially-funded projects (amounting to roughly $1M annually) that will support the direct application and transfer of this core science to industry. The applicant is well placed to undertake this research with major infrastructure for stamping, hydroforming, tube bending, electromagnetic forming, impact testing and high strain rate material characterization.