Constitutive modeling of large strain behaviour of magnesium alloys

镁合金大应变行为的本构模型

• 批准号: 327220-2011
• 负责人: Wu, PeiDong
• 金额: $ 2.91万
• 依托单位: McMaster University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2015
• 资助国家: 加拿大
• 起止时间: 2015-01-01 至 2016-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=571952
• 关键词: Constitutive; modeling; large; strain; behaviour

There has been considerable societal and government legislative pressure on automotive producers to reduce fuel consumption and exhaust gas emissions from vehicles. One of the most effective ways to achieve this is by the weight reduction that can be obtained by replacing steel and aluminum with magnesium in the vehicle structure and body panels. However, magnesium alloys have a number of perceived and real technological limitations, the most significant of which is their reduced formability as compared to aluminum and steel. It is believed that this could be eliminated by the development of improved alloys, or circumvented through the use of new manufacturing methods. The forming behavior of magnesium and its alloys is far poorer understood than that of steel and aluminum. From the experiences gained in developing other materials like aluminum and steel for similar applications, appropriate constitutive modeling is an important and foundational part of the development process. Therefore, the main purpose of this proposed research program is to develop/improve and validate constitutive models for describing large strain behavior of magnesium alloys under various deformation processes. The major impact of the proposed work will be the development of basic scientific knowledge and the training opportunities that arise while conducting this research. The results of this research will be of great value to the key industries involved in light metal fabrication processes and will ultimately lead to cost-effective fabrication processes utilizing optimum formability and performance characteristics.

社会和政府对汽车生产商施加了相当大的立法压力，要求他们减少车辆的燃料消耗和废气排放。实现这一目标的最有效方法之一是通过在车辆结构和车身面板中用镁替代钢和铝来减轻重量。然而，镁合金具有许多感知到的和真实的技术限制，其中最显著的是与铝和钢相比它们降低的可成形性。据信，这可以通过开发改进的合金来消除，或者通过使用新的制造方法来规避。 镁及其合金的成形行为远比钢和铝的成形行为了解得少。从开发类似应用的其他材料（如铝和钢）的经验来看，适当的本构建模是开发过程的重要和基础部分。 因此，本研究计划的主要目的是开发/改进和验证用于描述各种变形过程下镁合金大应变行为的本构模型。 拟议工作的主要影响将是发展基础科学知识和开展这项研究时出现的培训机会。这项研究的结果将是非常有价值的关键行业参与轻金属制造工艺，并最终导致成本效益的制造工艺利用最佳的成形性和性能特点。