Fatigue strength of laser-stake welded T-joints subjected to combined axial and shear loads
Fatigue strength of laser-stake welded T-joints subjected to combined axial and shear loads
复制标题
承受轴向和剪切联合载荷的激光桩焊接 T 形接头的疲劳强度
DOI：
10.1007/s40194-016-0322-z
复制
发表时间：
2016
影响因子：
2.1
通讯作者：
A. Sumpf
中科院分区：
文献类型：
--
作者：
W. Fricke;C. Robert;R. Peters;A. Sumpf
激光桩焊可以经济地生产全钢夹层板，可用于钢桥以及滚装/滚卸船（渡轮）的甲板。厚度为10 mm的桥面板可与内腹板连接，确保焊缝厚度为2-3 mm。在一个研究项目中，进行了疲劳试验，激光桩焊缝进行轴向，剪切和多轴同相加载和评估的名义和缺口应力的方法。除了桥面板和腹板之间的间隙或钢材强度的可能影响外，还应按照欧洲规范3和IIW多轴载荷疲劳评估建议中的要求，检查激光桩焊的相互作用公式的应用。此外，等效von Mises应力使用切口应力方法施加。为激光桩焊T型接头的安全设计提供了依据。
Laser-stake welding enables an economic production of all-steel sandwich panels that can be used for steel bridges as well as for decks in roll-on/roll-off ships (ferries). Deck plates of 10 mm thickness can be joined with interior web plates ensuring a weld throat thickness of 2–3 mm. In a research project, fatigue tests were performed with laser-stake welds subjected to axial, shear and multiaxial in-phase loading and assessed by the nominal and the notch stress approach. In addition to possible effects of gaps between deck and web plates or of the steel strength, the application of interaction formulae to laser-stake welds is checked as contained in Eurocode 3 and the IIW recommendations for the fatigue assessment of multiaxial loading. Furthermore, the equivalent von Mises stress is applied using the notch stress approach. In this way, the basis is provided for a safe design of laser-stake-welded T-joints.