Dynamic modeling of a multi-scale sandwich composite panel containing flexible core and MR smart layer

2019 ◽  
Vol 134 (12) ◽  
Author(s):  
Farzad Ebrahimi ◽  
Mahsa Karimiasl
Keyword(s):  
Dynamic Modeling ◽  
Composite Panel ◽  
Sandwich Composite ◽  
Multi Scale ◽  
Flexible Core

Monotonic Behaviors of Steel Frames with Sandwich Composite Panel Infills: Theoretical and Numerical

2012 ◽  
Vol 193-194 ◽  
pp. 1424-1428
Author(s):  
Miao Liu ◽  
Yan Fei Sun ◽  
C.X. Qiu ◽  
He Tao Hou
Keyword(s):  
Structural Engineering ◽  
Theoretical Study ◽  
Numerical Models ◽  
Steel Frames ◽  
Composite Panel ◽  
Sandwich Composite ◽  
Actual Structure ◽  
Equivalent Strut ◽  
Cross Section Area ◽  
Section Area

Abstract: Analysis of infilled frames is one of the most complicated problems in the structural engineering field. This complication is mainly attributed to the existence of the variety and complex of the infills and the difficulty in modeling the infill-frames interaction. In the present paper, with the aim to study the integral behavior of the single-story single-bay steel frames with sandwich composite panel infills, a proper computational model (the panel is simplified into an equivalent pin-jointed diagonal strut) is proposed. In the theoretical study, both of the panels and steel frames are assumed to be in the linear elastic state for simplicity’s sake, and then the cross-section area of the equivalent strut is obtained by imposing the initial lateral stiffness of actual structure equal to that of simplified model. As a support of the discussion, several numerical models under monotonic lateral loadings are performed by software ABAQUS, in order to verify the theoretical analysis. Finally, results from theoretical study and numerical modeling are compared, which give a satisfactory correlation between them.

Simulation for the Bird-Strike Damage of Drone Radome Composite Structure

2012 ◽  
Vol 151 ◽  
pp. 305-309 ◽  
Author(s):  
Yan Bin He ◽  
Xiao Hu Yao ◽  
Xuan Liu ◽  
Ling Feng He
Keyword(s):  
Composite Structure ◽  
Impact Damage ◽  
Dynamic Responses ◽  
Composite Panel ◽  
Sandwich Composite ◽  
Bird Strike ◽  
Damage State ◽  
Element Analysis ◽  
Medium Speed ◽  
Maximum Impact Force

The low and medium speed bird-strike impact damage of sandwich composite structure of drone radome during takeoff and landing is examined by numerical simulations, using nonlinear dynamic finite element analysis software LS-DYNA. For different impact velocities, the aircraft radome’s dynamic responses are obtained and the damage in composite panel is clearly demonstrated. The relations of impact energy, maximum impact force and the damage state are analyzed. The simulation results can provide some references for the aircraft radome design.

DIFFERENT FAILURE MODES ASSESSMENT TO IMPROVE THE SANDWICH COMPOSITE PANEL STIFFNESS WITH HONEYCOMB CORE FOR MARINE STRUCTURES APPLICATION

2016 ◽  
Vol 78 (11) ◽  
Author(s):  
Mehdi Nakisa ◽  
Fatemeh Behrouzi ◽  
Ahmad Mobasher Amini
Keyword(s):  
Failure Modes ◽  
Compressive Load ◽  
Composite Panel ◽  
Face Sheet ◽  
Core Material ◽  
Sandwich Composite ◽  
Carbon Fiber Composites ◽  
Honeycomb Core ◽  
Marine Structures ◽  
The Core

This research paper focuses on the prediction of different failure modes to improve the sandwich composite panel with honeycomb core for application in marine structures. Marine, automotive and aerospace industries are continually trying to optimize material performance in terms of strength and weight. Success has been achieved through the growth of high performance materials, including fibrous composites such as ceramics, new alloys, and carbon fiber composites and through the use of structural concepts such as sandwich composite panel construction. Sandwich composite panel construction with honeycomb core consists of three components: two facing sheets, the core that fill the space between the facing sheet and the core-to-facing bonding adhesives. The facing sheets of a sandwich panel can be compared to the flanges of an I-beam element, as they carry the bending stresses to which the beam is subjected. With one facing sheet in compression, the other is in tension. Similarly the honeycomb core corresponds to the web of the I-beam that resists the shear loads and vertical compressive load to the face sheet. This paper presents a model for prediction of different failure mode of face sheet and core material. The obtained results of this model were compared with experimental results and presents that it is a simple and good model.  

A Computational Study on Residual Strength of Sandwich Composite Panel

2011 ◽  
Vol 393-395 ◽  
pp. 521-525 ◽  
Author(s):  
Sang Kyo Lee ◽  
Mohd. Zahid Ansari ◽  
Na Wang ◽  
Chong Du Cho
Keyword(s):  
Residual Strength ◽  
Computational Study ◽  
Static Condition ◽  
Composite Panel ◽  
Sandwich Composite ◽  
Element Analysis ◽  
Reinforced Plastic ◽  
Out Of Plane ◽  
Aluminum Honeycomb ◽  
Plane Direction

The present study investigates numerically the compressive residual strength of indented sandwich composite panel. The composite is made of carbon fiber reinforced plastic (CFRP) face sheets and aluminum honeycomb core. The sandwich is loaded under quasi-static condition and along out-of-plane direction. A commercial finite element analysis software ABAQUS is used. The results show that the indented composite retains significant amount of strength after indentation. And, the post-indentation strength of the composite is about 65% its pre-indentation strength under compression.

scholarly journals Research and practices of large composite external wall panels for energy saving prefabricated buildings

2019 ◽  
Vol 289 ◽  
pp. 10012
Author(s):  
Yunxing Shi ◽  
Yangang Zhang ◽  
Kun Ni ◽  
Wei Liu ◽  
Ye Luo
Keyword(s):  
Production Process ◽  
Energy Saving ◽  
Thermal Insulation ◽  
Sandwich Panel ◽  
Composite Panel ◽  
Sandwich Composite ◽  
Composite Panels ◽  
Load Bearing ◽  
External Wall ◽  
Wall Panels

The production process and application of large composite external wall panels (composite panels for short) are introduced in this paper. Composite panels with both load bearing and thermal insulation were formed by pouring normal concrete (NC) and ceramsite foamed concrete (CFC) continuously according to particular technological requirements, which made two layers into a seamless whole. The layers of NC and CFC are for load bearing and thermal insulation respectively. The composite panels were manufactured in the scale of industrial production, and applied to several energy saving prefabricated buildings successively, instead of polystyrene sandwich composite panels (sandwich panel for short) as external wall panels. There are several obvious advantages of the composite panel over the sandwich panel or outer benzoic board. Firstly, it solved the problems of durability of polystyrene and the complex production process of the sandwich pane, the production process of the external wall was thus greatly simplified. In addition, the fire risk was much reduced.

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