Pyro-adaptive impact energy absorber

• Autorzy: Ostrowski M. , Griskevicius P. , Holnicki-Szulc J.
• Języki publikacji: PL

Abstrakty

EN

The paper contains a proposal of energy dissipation density controlling in lightweight thin walled structures by reducing their crushing stiffness during an impact process. For small scale laboratory experiments, low-energy-dissipation absorber was developed. Prismatic absorber made of thin lead sheets can dissipate the impact energy at two energy density levels. Moving the concept to the real steel or aluminum structures can lead to satisfying value of the Specific Energy Absorption indicator with possible control of the energy dissipation. Experimental and FE explicit simulation results showing controllable impact process of a thinwalled prismatic absorber with rectangular crossection are presented. The control of crushing forces proved to be possible and efficient. Adaptivity ratio achieved in the presented example was 35%. The idea of the presented absorber was based on automotive front rail shape. The experimental tests have to be re-conducted. Geometry of the tested absorber should be modified to facilitate the detachment process of the stiffening members.

Słowa kluczowe

EN

adaptive systems; crashworthiness; impact; control applications; finite element method

• Wydawca: Łukasiewicz Research Network - Institute of Aviation ; European Science Society of Powertrain and Transport KONES Poland ; Wydawnictwo Instytutu Technicznego Wojsk Lotniczych
• Czasopismo: Journal of KONES
• Rocznik: 2007
• Tom: Vol. 14, No. 1
• Strony: 303--309
• Opis fizyczny: Bibliogr. 7 poz., rys.

Twórcy

autor

Ostrowski M.

autor

Griskevicius P.

autor

Holnicki-Szulc J.

• Institute of Fundamental Technological Research, Polish Academy of Sciences, Swietokrzyska 21, 00-049 Warsaw, Poland,

Bibliografia

• [1]   Ostrowski, M., Griskevicius, P., Holnicki-Szulc, J., Feasibility study of an adaptive energy absorbing system for passenger vehicles. Proceedings of the 16th international conference on „Computer Methods in Mechanics" Częstochowa, Poland, 2005.
• [2]   Griskevicius, P., Ostrowski, M., Holnicki-Szulc, J., Ziliukas, A., Crash analysis of adaptive frontal energy absorbers. Transport Means, Proceedings of the international conference. ISSN 1822-296 X Kaunas: Technologija, pp. 312-316,2005.
• [3]   Hallquist, J.O.,   LS-DYNA   Theory   Manual,   Livermore   Software   Technology   Corp., Livermore, 2003.
• [4]   Wierzbicki, T., Abramowicz, W., On the crushing mechanics of thin-walled structures.Journal of Applied Mechanics, Vol.50,pp. 727-733,1983.
• [5]   Abramowicz, W., Jones, N., Dynamic progressive buckling of circular and square tubes, Int. J. Impact Eng. 4, pp. 243-270, 1986.
• [6]   Wierzbicki, T., Abramowicz, W., The mechanics of deep plastic collapse of thin-walled structures, in: Structural Failure, Wiley, New York, 1989.
• [7]   Holnicki, J., Mikulowski,  G.,  Mroz, A., Pawlowski, P., Adaptive Impact Absorption The Fifth International Conference on Engineering Computational Technology, Las Palmas de Gran Canaria, Spain, 2006.