Modares Mechanical Engineering

Modares Mechanical Engineering

Experimental Investigation and Regression Analysis on Plastic Deformation of Sandwich Panels made of Reinforced Polymeric Foam under Explosive Loading

Document Type : Original Research

Authors
Majid Hatampour 1
Rouhollah Hosseini 1
Mahdi Hasanzadeh 2
Kh. Vahedi 1
1 Department of Mechanical Engineering, Imam Hossein University, Tehran, Iran
2 Department of Textile Engineering, Yazd University, Yazd, Iran
Abstract
In this paper, experimental investigation and regression analysis on plastic deformation of polyurethane composite sandwich panels reinforced with nanoclay under blast loading is investigated. For this purpose, polyurethane sandwich panels with different percentages of nanoclay and in different densities were prepared. The mechanical properties of nanoclay-reinforced foams were studied by tensile-compression test. Explosive shock tube device and C4 explosive material were used for explosive loading. Then, in order to investigate the effect of significant parameters such as the percentage of nanoclay and density of polyurethane foam on the displacement of composite sandwich panels and optimizing them for minimum deformation, the response surface methodology was used. The results obtained from the regression model at 95% confidence level indicate a very good agreement between the experimental results and the values ​​predicted by the model. The high value of the correlation coefficient between the studied parameters and the amount of plastic deformation of the sandwich panel (R2 = 99%) indicate that the proposed model has a higher accuracy. Finally, the optimal conditions for achieving the minimum displacement of composite sandwich panels were determined as 1.57% nanoclay content and foam density of 130 kg/m3.
Keywords
Polyurethane foam
Nanoclay
explosive loading
Optimization
response surface methodology

Subjects

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Modares Mechanical Engineering
Volume 20, Issue 11
November 2020
Pages 2671-2678