On the performance of thin-walled crash boxes joined by forming

A new joining by forming process that combines lancing and shearing with sheet-bulk compression is utilized to assemble thin-walled crash boxes utilized as energy absorbers. Process design and fabrication of the new crash boxes are analyzed by finite elements and experimentation. Axial crush tests w...

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Bibliographic Details
Main Author: Silva, Diogo F. M. (author)
Other Authors: Silva, Carlos (author), Bragança, Ivo (author), Nielsen, Chris Valentin (author), Alves, Luís (author), Martins, Paulo (author)
Format: article
Language:eng
Published: 2018
Subjects:
Crash boxes
Joining by forming
Resistance spot-welding
Crashworthiness
Online Access:http://hdl.handle.net/10400.21/9109
Country:Portugal
Oai:oai:repositorio.ipl.pt:10400.21/9109
Description
Summary:A new joining by forming process that combines lancing and shearing with sheet-bulk compression is utilized to assemble thin-walled crash boxes utilized as energy absorbers. Process design and fabrication of the new crash boxes are analyzed by finite elements and experimentation. Axial crush tests were performed to compare the overall crashworthiness performance of the new crash boxes against that of conventional crash boxes assembled by resistance spot-welding. Results show that the joining process is a good alternative to resistance spot-welding because the new crash boxes can absorb the same crushing energy, and because the new process helps to overcome typical manufacturing problems of welding.

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