Mitigation of implosion energy from aluminum structures

INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES

卷:100

Article

Matos, Helio¹  Shukla, Arun¹ 

[1] Univ Rhode Isl, Dynam Photomech Lab, Dept Mech Ind & Syst Engn, Kingston, RI 02881 USA

关键词: Implosion;    Fluid structure interaction;    High-speed photography;    Digital image correlation;    Energy mitigation;    Polyurea coating;   

DOI  :  10.1016/j.ijsolstr.2016.09.030

来源: Elsevier

【 摘 要 】

This study aims to develop an experimental scheme to determine the localized energy emitted during the dynamic collapse of aluminum structures. Upon collapse, these structures release damaging pressure pulses into the surrounding fluid; to mitigate this effect, the structures are coated with polyurea. The new energy scheme is used to analyze the energy emission from coated structures. Specifically, aluminum tubular structures with polyurea coatings on their interiors or exteriors are used. Furthermore, the technique combines the information obtained from pressure sensors, located near the collapsing structure, and high-speed images taken during the collapse event. These images are processed through a 3D Digital Image Correlation technique to obtain full deformation and velocity fields. Results show that the energy history can be successfully obtained experimentally. Moreover, the energy emitted from coated aluminum structures is significantly less than the uncoated structures; more so with interior coated structures, and doubling the coating volume does not significantly improve this mitigation effect. Additionally, collapse volume has a direct relationship with energy and is a dominant factor in determining the energy release. (C) 2016 Elsevier Ltd. All rights reserved.

【 授权许可】

Free