Quality control and fatigue design of friction stir welded joints in aluminum bridge decks

铝桥面搅拌摩擦焊接头的质量控制和疲劳设计

• 批准号: 494843-2016
• 负责人: Walbridge, Scott
• 金额: $ 3.1万
• 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: 2016
• 资助国家: 加拿大
• 起止时间: 2016-01-01 至 2017-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=603316
• 关键词: Quality; control; fatigue; design; friction

Highway authorities in North America are currently faced with significant and pressing bridge maintenance costs. A recent industry report on aluminum use in bridges found light weight decks for new bridges and rehabilitation projects to be an application area with particular promise. A subsequent economic study concluded that: 1) bridge decks are an application where aluminum clearly has a potential for market growth, and 2) friction stir welding (FSW) represents a transformative technology, which could have a significant influence on the durability and economics of aluminum bridge decks. A design code for structural FSW joints does not yet exist in Canada. Existing international codes (e.g. ISO, AWS) include quality control provisions based on "best practice", which have not yet been related to structural performance.

北美公路当局目前面临着巨大而紧迫的桥梁维护成本。最近一份关于桥梁铝使用的行业报告发现，用于新桥梁和修复项目的轻质桥面板是一个特别有前景的应用领域。随后的一项经济研究得出的结论是：1) 桥面是铝显然具有市场增长潜力的应用，2) 搅拌摩擦焊 (FSW) 代表了一种变革性技术，可能对铝桥面的耐用性和经济性产生重大影响。加拿大尚无结构 FSW 接头的设计规范。现有的国际规范（例如ISO、AWS）包括基于“最佳实践”的质量控制条款，但尚未与结构性能相关。