关键词: 概念模型, 接头, 模拟, 柔度, 电子探针, 贫碳层, 熔合比, 碳迁移, 异种金属焊接

Abstract: Joint element is defined, the flexibility of joints is studied, and a joint modeling method in the concept model of car body structure is developed. In addition , the effect of changing joint flexibilities on structural stiffness is analyzed.

Key words: Concept model, Flexibility, Joint, Modeling, carbon migration, carbon-depleted zone, dissimilar welding, electron probe, fusion ratio