Abstract: The paper addresses a comparative analysis between theoretical and experimental results of the deposition rates, achieved by Submerged Arc Welding, when single and multiple wires technologies are applied. Two welding variants have been investigated in the research program, one power source welding on the one hand and two power sources welding (Tandem technique) on the other hand. Classical welding current power sources - i.e. standard DC and rectangular waveform AC - and also the most recent inverter power source, which allows waveform modulating, were selected and used in the experimental program. Comparing the deposition rates achieved in the case of using two conventional power sources systems (Tandem Single + Single wire welding) with values achieved in the case of multiple-wire welding technique (even if a traditional welding system with only one single power source is used), a higher productivity of the welding process has been noticed when multiple-wire technology is applied. Fi

• Publication Date: 26-Oct-2014
• DOI: 10.15224/978-1-63248-031-6-150
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Abstract: In this study, vibration of effect of nanoparticle on an Euler-Bernoulli nano-beam is investigated using nonlocal elasticity beam theory. Equation of motion of nanobeam is obtained using Hamilton’s principle. The dimensionless equations are solved for the various boundary conditions. Approximate solutions of the equations are obtained by using the method of multiple scales a perturbation technique. The first terms of the perturbation series lead to the linear problem. Exact solutions are given natural frequencies for the linear problem. The effects of the different nonlocal parameters () and mass ratios () as well as effects of different boundary conditions on the vibrations are determined.

• Publication Date: 26-Oct-2014
• DOI: 10.15224/978-1-63248-031-6-151
• Views: 0
• Downloads: 0