报告题目：Rivetless Aircraft Structures: Possible solutions based on Friction Stir and derivative processes
报告人：Jorge F. dos Santos博士，德国亥姆霍兹-吉斯达赫特国家研究中心
Dr. Jorge F. dos Santos is currently the head of the Department Solid State Joining Processes, Institute of Materials Research, Materials Mechanics, ACE Centre, Helmholtz-Zentrum Geesthacht. He is also the chairman of Commission III “Resistance Welding, Solid State Welding and Allied Joining Processes” of the International Institute of Welding (IIW). Chairman of Sub-Commission IX-NF “Weldability of NonFerrous Materials of the International Institute of Welding (IIW). Chairman of Working Group B4 ”Standardization of Friction Spot based Processes of the International Institute of Welding (IIW) / established under the auspices of ISO. His recent research topic includes Joining Processes, Microstructural Development in Similar and Dissimilar Joints, Mechanical Performance and Assessment of Welded Joints. His published numerous researches. In total, 22 patents have been granted, 16 are currently in evaluation process and 2 are being compiled. These patents are concerned with advanced fabrication processes, technologies and equipment as well as specific applications making use of these processes, technologies and equipment. Over 400 publications in four languages have been published since 1988 and“h-index” (Scopus) = 32, in January 2017.
Jorge F. dos Santos博士是德国Helmholtz-Zentrum Geesthacht国家研究中心固态连接工艺研究部主任、高级研究员、汉堡大学和汉堡-哈堡工业大学兼职教授。他是国际上搅拌摩擦焊接领域的著名学者，在搅拌摩擦焊接领域具有非常大的影响力。他也是国际焊接学会III委电阻焊、固相焊及相关连接技术专业委员会主席，国际焊接学会IX委有色金属焊接性分委会主席。目前主要从事连接工艺、同种及异种接头组织演化、焊接接接头力学性能评估等方面的研究。在先进连接工艺、技术及装备领域共获得授权专利22项、申请18项，发表各类论文超过400篇。
It is estimated that the market demand for new aircraft in all classes will reach 33.000 units by the year 2035. Moreover, it is expected that this increase in production should be coupled with improved structural safety and reduced costs by fulfilling present environmental requirements (“clean manufacturing”). One way to achieve such demands is to introduce new production processes, in replacement to riveting, currently the most common assembly technology in aircraft manufacturing (i.e. rivetless aircraft structures). In this context, solid-state joining process offer ideal basis for application in such structures. These processes have been shown to be suitable to join all structural Al alloys in similar or dissimilar configurations, producing joints with superior properties and surface quality, in comparison to riveting. Currently a number of solid-state joining processes are being considered for possible application in the aeronautical industry: i.e., friction stir welding (FSW), refill friction spot welding (refill FSSW), etc. In the case of FSW, two variants of the process have shown great potential for a future application: stationary-shoulder bobbin tool (SS-BTFSW) and stationary shoulder FSW (SS-FSW). In this work results of the application of solid-state joining processes on the realisation of rivetless aircraft structures are presented. In the main part of this study emphasis has been placed on the importance of different disciplines in the area of welding and joining in the realisation of such structures. The second part of this work discusses the mechanical performance of the joints, including toughness and fatigue crack propagation behaviour.