Please use this identifier to cite or link to this item: https://scholarbank.nus.edu.sg/handle/10635/141924
Title: DESIGN AND OPTIMIZATION OF CELLULAR STRUCTURES FOR ENERGY ABSORPTION APPLICATIONS
Authors: LALITENDU TRIPATHY
ORCID iD:   orcid.org/0000-0002-0641-2538
Keywords: cellular structures, crashworthiness, quasi-static axial crushing, finite element analysis, optimization, response surface model
Issue Date: 24-Jan-2018
Citation: LALITENDU TRIPATHY (2018-01-24). DESIGN AND OPTIMIZATION OF CELLULAR STRUCTURES FOR ENERGY ABSORPTION APPLICATIONS. ScholarBank@NUS Repository.
Abstract: The thin-walled sections have long been utilized as energy absorbing structures owing to their high energy absorption capability. However, their high values of peak crush forces (PCF) pose serious safety concerns. Consequently, this work focusses on the design of better crashworthy structures. At first, a finite element (FE) model is devised to analyze the quasi-static axial crushing and, subsequently validated experimentally using structures fabricated through additive manufacturing. Thereafter, the crashworthiness of the cellular truss structures is investigated. The truss structures are found to result in a substantial reduction in PCFs when compared to thin-walled sections. Then, the parametric study and crashworthiness optimization of truss structures are performed. Finally, the work concludes with a comparative assessment of the crashworthiness of a few commonly available lattice structures. The in-depth investigations have proven that the cellular structures can be used as an alternate for energy absorption applications.
URI: http://scholarbank.nus.edu.sg/handle/10635/141924
Appears in Collections:Ph.D Theses (Open)

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