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- W188590275 abstract "Welded joints are often used to fabricate assembled structures in machine tools, automotive and many such industries requiring high damping. The damping mechanism ofwelded jointed structures can be explained by considering the energy loss due to friction and the dynamic slip produced at the interfaces. The frictional damping is evaluated from the relative slip between the jointed interfaces and is considered to be the most useful method for investigating the structural damping. The theoretical analysis proposes two different methods to calculate damping: classical method and finite element method. The damping characteristics in jointed structures are influenced by the intensity of pressure distribution,micro-slip and kinematic coefficient of friction at the interfaces and the effects of all these parameters on the mechanism of damping have been extensively studied. All the above vital parameters are largely influenced by the thickness ratio of the beam and thereby affect thedamping capacity of the structures. In addition to this, number of layers, beam length and distance between two take welding also play key roles on the damping capacity of thejointed structures quantitatively. It is established that the damping capacity can be enhanced appreciably using larger beam length and distance between two welded points as well as lower thickness ratio of the beams. Further improvement in damping is possible with the useof more number of layers compared to its equivalent solid one. This design concept of using layered structures with welded joints can be effectively utilized in trusses and frames, aircraft and aerospace structures, bridges, machine members, robots and many other applications where higher damping is required. Extensive experiments have been conducted on a number of mild steel specimens under different initial conditions of excitation for establishing the authenticity of the theory developed." @default.
- W188590275 created "2016-06-24" @default.
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- W188590275 date "2012-05-14" @default.
- W188590275 modified "2023-09-27" @default.
- W188590275 title "Damping of fixed-fixed welded joints" @default.
- W188590275 hasPublicationYear "2012" @default.
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