Numerical study of lightweight sandwich panels under explosion using rigid polyurethane foam and vulcanized rubber | ||||
The International Conference on Civil and Architecture Engineering | ||||
Article 35, Volume 9, 9th International Conference on Civil and Architecture Engineering, May 2012, Page 1-14 PDF (2.03 MB) | ||||
Document Type: Original Article | ||||
DOI: 10.21608/iccae.2012.44279 | ||||
View on SCiNiTO | ||||
Authors | ||||
M. Rashad1; M. A. Elwahab2; S. Y. Mahfoz3; M. S. Amin4 | ||||
1Post graduate student: Civil Engineering Department, Military Technical College, Cairo, Egypt. | ||||
2Ph. D. Director of T.R.C. Cairo, Egypt. | ||||
3Assistance Professor: Civil Engineering Department, Military Technical College, Cairo, Egypt. | ||||
4Ph. D. Lecturer: Civil Engineering Department, Military Technical College, Cairo, Egypt . | ||||
Abstract | ||||
Abstract Structural weight reduction is one of the main design objectives in structural engineering. Various concepts have been proposed to reduce weight of military tunnels protecting layers and armored doors. Among them, application of sandwich sheets which comprise of two face sheets and low-density core materials which offers a significant weight reduction, high resistance against blast loads, and the ability to withstand repetitive blast loa ds. In this paper, numerical investigations were conducted using 3D nonlinear finite element simulations with commercial ANSYS AUTODYN software. A number of peripherally simply supported (from all sides) nonmetallic core sandwich panels with either rigid p olyurethane foam (RPF) or vulcanized rubber (VR) cores were studied. A parametric study was carried out to study the behavior of these types of sandwich panels against blast load. Different thickness for different core materials were tested namely 5, 10, 15, and 20 cm. Sandwich Panels were subjected to different blast charges of 1, 5 and 10 kg TNT at fixed standoff distance 1 meter. It was concluded that the behavior of high density RPF sandwich panel is better than that of VR sandwich panel. Using rigid polyurethane foam instead of vulcanized rubber as a core material decreases the maximum displacement by an average value 48.67 %, for the three different blast loads, which is good displacement reduction. | ||||
Keywords | ||||
3D nonlinear finite element analysis; rigid polyurethane foam; vulcanized rubber; blast loads | ||||
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