بررسی تجربی و شبیه‌سازی عددی جذب انرژی در لوله استوانه ای پر شده از فوم پلی اورتان با استفاده از آغازگر

نویسندگان

1 دانشگاه آزاد اسلامی

2 دانشگاه سمنان

چکیده

در این مقاله‏‌، جذب انرژی در لوله‌های استوانه‌ای پر شده از فوم پلی اورتان با استفاده از آغازگر تحت نیروی محوری بررسی می‌شود. در این تحقیق، یک آغازگر در بالای لوله پر شده از فوم قرار می‌گیرد تا از اعمال نیروی ناگهانی به قسمت اصلی سازه جلوگیری کند. بدین منظور یک لوله استوانه‌ای پر شده از فوم پلی‌اورتان با آغازگر در نرم افزار آباکوس به صورت شبه استاتیک مدل می‌شود و اثر طول آغازگر در میزان جذب انرژی ویژه، نحوه تغییر شکل و منحنی نیرو-جابجایی مطالعه می‌گردد. همچنین، به منظور بررسی صحت نتایج حاصل از شبیه‌سازی عددی تعدادی تست تجربی انجام شده که نتایج قابل قبولی را نشان می‌دهد.

کلیدواژه‌ها


عنوان مقاله [English]

Experimental and numerical investigation of energy absorption of foam-filled cylindrical tubes with initiator

نویسندگان [English]

  • Negin Negahban Vasheghani 1
  • Mohammad Javad Rezvani 1
  • Mohammad Damghani Nouri 2
1
2
چکیده [English]

In this paper, axial crushing of foam-filled cylindrical aluminium tubes with initiator is investigated. For this purpose, an initiator is placed at the top of the foam-filled tube to prevent a sudden force applied to the main part of the structure when the accident occurs. In this new design model, several numerical simulations using ABAQUS 5.6 finite element explicit code are carried out to study the effects of length initiator on crashworthiness characteristics of the foam-filled thin-walled cylindrical tubes. In order to verify these numerical results, a series of quasi-static axial compression tests are performed. Moreover, load-displacement curves and deformation mechanism of the structure under axial compression are described. The results show that the initiator reduces the intensity of damage to the main structure and occupants.

کلیدواژه‌ها [English]

  • Specific energy absorption
  • Maximum crushing load
  • initiator
  • Polyurethane foam
 
[1]        P. Thornton, "Energy absorption by foam filled structures,"  0148-7191, 1980.
[2]        B. Lampinen, "Effectiveness of polyurethane foam in energy absorbing structures," 1982.
[3]        S. Reid, T. Reddy, and M. Gray, "Static and dynamic axial crushing of foam-filled sheet metal tubes," International Journal of Mechanical Sciences, vol. 28, pp. 295-322, 1986.
[4]        T. Reddy and R. Wall, "Axial compression of foam-filled thin-walled circular tubes," International Journal of Impact Engineering, vol. 7, pp. 151-166, 1988.
[5]        W. Abramowicz and T. Wierzbicki, "Axial crushing of foam-filled columns," International Journal of Mechanical Sciences, vol. 30, pp. 263-271, 1988.
[6]        S. Guillow, G. Lu, and R. Grzebieta, "Quasi-static axial compression of thin-walled circular aluminium tubes," International Journal of Mechanical Sciences, vol. 43, pp. 2103-2123, 2001.
[7]        M. Langseth, O. Hopperstad, and A. Hanssen, "Crash behaviour of thin-walled aluminium members," Thin-walled structures, vol. 32, pp. 127-150, 1998.
[8]        S. Hosseinipour and G. Daneshi, "Energy absorbtion and mean crushing load of thin-walled grooved tubes under axial compression," Thin-Walled Structures, vol. 41, pp. 31-46, 2003.
[9]        X. Zhang, H. Su, and T. Yu, "Energy absorption of an axially crushed square tube with a buckling initiator," International Journal of Impact Engineering, vol. 36, pp. 402-417, 2009.
[10]      X. Zhang, Q. Tian, and T. Yu, "Axial crushing of circular tubes with buckling initiators," Thin-walled structures, vol. 47, pp. 788-797, 2009.
[11]      A. Ghamarian and M. Tahaye Abadi, "Axial crushing analysis of end-capped circular tubes," Thin-Walled Structures, vol. 49, pp. 743-752, 2011.
[12]      W. Yan, E. Durif, Y. Yamada, and C. e. Wen, "Crushing simulation of foam-filled aluminium tubes," Materials transactions, vol. 48, pp. 1901-1906, 2007.
[13]      L. Mirfendereski, M. Salimi, and S. Ziaei-Rad, "Parametric study and numerical analysis of empty and foam-filled thin-walled tubes under static and dynamic loadings," International Journal of Mechanical Sciences, vol. 50, pp. 1042-1057, 2008.
 [14]     S. Y. Maaita, "Effects of constrained foam deformation inaluminum tubes under quasi-static and dynamic axial compression loading," 2004.
 
[15]      H. Zarei and A. Ghamarian, "Experimental and Numerical Crashworthiness Investigation of Empty and Foam-Filled Thin-Walled Tubes with Shallow Spherical Caps," Experimental Mechanics, pp. 1-12, 2013.
[16]      A. R. Ghani and M. Hassan, "AXIAL CRUSH BEHAVIOUR OF SQUARE COLUMN WITH EXTERNAL TAPERED PLUNGER."2013.
[17]      A. Aljawi, "Numerical simulation of axial crushing of circular tubes," JKAU: Eng. Sci, vol. 14, pp. 3-17, 2002.