Browsing by Author "Alves, L. M."
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- Joining of sheets by sheet-bulk forming: a numerical and experimental studyPublication . Bragança, Ivo; Loja, Amélia; Silva, C. M. A.; Alves, L. M.; Martins, P. A. F.The authors present a new mechanical joining process that allow to connect two sheets perpendicular to one another, a variant of the traditional ‘mortise-and-tenon’ joint. This investigation is focused on joining similar and dissimilar sheets based on sheet-bulk forming and it is supported by experimental data and numerical simulation with an in-house finite element program, I-form. Results show that is possible to join materials by sheet-bulk forming and is also presented the joinability window as a function of the main operating parameters. The divided flux technique could be a valid option to eliminate the observed small clearance related to the elastic recovery of polymers. Furthermore, this technique could also be applied whether a lower initial punch force is required or even a different head morphology is desired. Destructive tensile tests were performed to determine the maximum force that the joints are capable to withstand without failure and to identify the failure mechanism.