摘要
本课题是上海汽车工业基金汽车轻量化研究工作的一部分。汽车轻量化对于节省能源、保护环境、提高安全都有着重要的现实意义,而铝合金材料的应用则是解决该问题的有效途径之一。目前,国内在这一方面尚与先进国家存在较大差距,主要是由于铝合金结构在焊接工艺上存在较大问题。国内外相关文献主要集中在焊后组织及性能的模拟,本课题旨在对铝合金结构的焊接变形进行数值分析,为制定和优化焊接工艺提供必要的参考。
Aluminum alloys are ideal materials to make the automobile lightened in order to save the energy and improve the safety. But some factors prevent Alumi num alloys from being used more wildly in the automobile and it is an important one that the suitable welding technique is difficult to find. The aluminum alloy 's rigidity is smaller than the steel's, and it will be softened in the welding. So more factors should be considered and some constraints should be modified in the simulation of the aluminum alloy welding.
