Oblique crushing of truncated conical sandwich shell with corrugated core

All-metallic truncated conical sandwich shells with corrugated cores (TCSS) were investigated for crashworthiness under quasi-static oblique compression using a combined experimental and numerical approach. Subsequently, multi-objective optimization design of the TCSS was also performed by adopting the algorithm of NSGA-II to achieve maximum specific energy absorption (SEA) and minimum peak force (F-P). Compared with a monolithic shell, the TCSS exhibits much higher SEA and lower F-P under oblique loading, especially with its semi-apical angle set around 10 degrees to 15 degrees. The results provide valuable guidance for the application of truncated conical sandwich tubes in protective engineering, such as vehicle crashworthiness.

Automated summary

Through experimental and numerical analysis, it was found that metallic truncated conical sandwich shells with corrugated cores exhibit higher energy absorption and lower peak force under oblique compression, especially when the semi-apical angle is set around 10 degrees to 15 degrees. These results provide valuable guidance for the application of truncated conical sandwich tubes in protective engineering.