Related Experiment Video
Updated: Feb 8, 2026

Design and Optimization Strategies of a High-Performance Vented Box
Published on: June 9, 2023
On the Performance of Thin-Walled Crash Boxes Joined by Forming
Diogo F M Silva1, Carlos M A Silva2, Ivo M F Bragança3
1Instituto de Engenharia Mecânica, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal. diogogjmsilva@tecnico.ulisboa.pt.
Abstract:
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.
Related Concept Videos
Plant Cell Wall
Plant Cell Wall
Composite Masonry Walls
Masonry Cavity Walls
Maintaining a clean cavity during construction...
Masonry Loadbearing Walls
Masonry Curtain Walls

