The effect of percent foam fill ratio on the energy absorption capacity of axially compressed thin-walled multi-cell square and circular tubes

ALTIN M., GÜLER M. A., Mert S. K.

INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES, cilt.131, ss.368-379, 2017 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 131
  • Basım Tarihi: 2017
  • Doi Numarası: 10.1016/j.ijmecsci.2017.07.003
  • Dergi Adı: INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.368-379
  • Anahtar Kelimeler: Crashworthiness, Multi-cell tubes, Energy absorption, Thin-walled structure, Crush force efficiency, Specific energy absorption, MULTIOBJECTIVE CRASHWORTHINESS OPTIMIZATION, CRUSHING ANALYSIS, CONSTITUTIVE MODELS, BITUBAL STRUCTURES, CONICAL TUBES, CRASH BOXES, DESIGN, EXTRUSIONS, COLUMNS, DEFORMATION
  • Gazi Üniversitesi Adresli: Evet

Özet

In this study, the effect of foam fill ratio on the energy absorption capacity of axially compressed thin-walled multi-cell square and circular tubes is investigated. In the experimental study, Aluminum tubes having circular cross-sections with four different foam fill ratio (11.4%, 22.8%, 34.2%, 100%) were subjected to compression tests under quasi-static test conditions. The finite element (FE) models of these tests were prepared and FE analysis were conducted using LS-DYNA program for validation study. After validating the FE models with real experiments, a total of 24 different multi-cell geometries (6 square empty, 6 square with various foam fill ratio, 6 circular empty and 6 circular with various foam fill ratio) were created. A total of three different wall thicknesses were used for each geometry in the explicit dynamic analyses. It is found out that specific energy absorption (SEA) of foam-filled square design is 5 times larger compared to the empty square design which has minimum SEA. By varying the wall thickness, the SEA and crush force efficiency (CFE) performances of the foam-filled square design can be increased by 87% and 42% respectively. The main goal of this study is to find the best multi-cell design having maximum SEA and CFE. (C) 2017 Elsevier Ltd. All rights reserved.