Impact crushing behavior of foam-filled paraboloid shells using numerical and experimental methods

Document Type: Article

Authors

1 Department of Aerospace Engineering, Faculty of New Sciences and Technologies, University of Tehran, North Kargar Street, Tehran, Postcode: 1439957131, Iran

2 Department of Aerospace Engineering, Sharif University of Technology, Tehran, P.O. Box 11155-8639, Iran

3 Department of Aerospace Engineering, Sharif University of Technology, Tehran, P.O. Box 11155-8639, Iran.

4 Faculty of Engineering, Kharazmi University, Tehran, P.O. Box 15719-14911, Iran.

5 Department of Mechanical Engineering, Iran University of Science & Technology, Tehran, Iran

6 Department of Aerospace Engineering, Amirkabir University of Technology, Tehran, Iran

Abstract

This paper deals with the dynamic response and energy absorption of foam-fi lled aluminum parabolic tubes under axial impact loading. The numerical crush analysis of empty and foam- lled tubes is performed using non-linear nite element techniques. The eff ects of geometrical (wall thickness) and material parameters (foam density and Young's relaxation modulus) on the impact response and energy absorption capacity of foam- filled tube are investigated using numerical models. The results show that the foam properties
have signi cant e ect on the crushing behavior, force and impact acceleration magnitude, and energy absorption capacity. Furthermore, there is a critical foam density beyond which the structure loses its energy absorption performance. Experimental results acquired from a test setup are used for validating the Finite-Element Analysis (FEA). There is good agreement between numerical and experimental results.

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