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Welding is an operation that aims to join two or more pieces, holding that on combination of these parts there will has no discontinuity of physical, chemical and metallurgical properties for its use and performance. This work deals with the modeling of this system. For this, two models are presented: one represents the dynamic of drop formation on electrode tip and the second model represents mass...
The collapse mode of operation of capacitive micromachined ultrasonic transducers (CMUTs) was shown to be a very effective way to achieve high output pressures. However, no accurate analytical or equivalent circuit model exists for understanding the mechanics and limits of the collapse mode. In this work, we develop an equivalent nonlinear electrical circuit that can accurately simulate the mechanical...
The real time monitoring and control of resistance spot welds is a problem of critical importance in automotive and many other manufacturing industries. However, till this date, there are no reliable, low-cost, non-destructive techniques for predicting the size and strength of the weld nuggets in real time. This paper investigates the usage of voltage, current, and force data for the above tasks....
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