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- W233162854 abstract "This project examines the potential of Composite Metal Foams (CMFs) to improve the crashworthiness of railroad cars. The study extends current knowledge by investigating CMFs’ behavior under high-speed loading rates to mimic the speeds at which passenger cars and trains travel. The results of this study indicate a high strain rate sensitivity for both steel–steel composite metal foams (CMF) (processed through powder metallurgy) and aluminum–steel CMF (processed through casting). This can be translated to a significant improvement of their energy absorption capacity at higher strain rates, similar to those found in the collision of railroad cars. The kinetics of entrapped air inside the spheres seems to be the main factor controlling the strain rate sensitivity of composite metal foams. The results suggest that using steel–steel or aluminum–steel composite foams in the structure of the crash energy management system (CEMS) of railroad cars will improve their performance while maintaining the same weight or volume. Alternatively, using CMFs and maintaining the same performance will result in significant volume and weight savings. The maximum force absorption by either type of CMF (Al-S or SS with various sphere sizes) well exceeds the current FRA requirements of 800 kips buff strength for the under-frames of conventional cars and 1200 kips for alternatively designed cars. This can be translated into a more efficient CEMS when CMFs are implemented." @default.
- W233162854 created "2016-06-24" @default.
- W233162854 creator A5057409245 @default.
- W233162854 date "2014-11-01" @default.
- W233162854 modified "2023-09-26" @default.
- W233162854 title "Materials with Improved Absorption of Collision Forces for Railroad Cars" @default.
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- W233162854 hasPublicationYear "2014" @default.
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