Preparation and properties of thermoplastic honeycomb core sandwich structure with aluminum skin

2011 ◽  
Vol 46 (2) ◽  
pp. 183-191 ◽  
Author(s):  
S. Nurashikin ◽  
Akil Hazizan
Keyword(s):  
Sandwich Structure ◽  
Honeycomb Core

scholarly journals Compression Properties and Its Prediction of Wood-Based Sandwich Panels with a Novel Taiji Honeycomb Core

Forests ◽  
2020 ◽  
Vol 11 (8) ◽  
pp. 886 ◽  
Author(s):  
Jingxin Hao ◽  
Xinfeng Wu ◽  
Gloria Oporto-Velasquez ◽  
Jingxin Wang ◽  
Gregory Dahle
Keyword(s):  
Compression Strength ◽  
Sandwich Structure ◽  
Mechanical Performance ◽  
Compression Modulus ◽  
Honeycomb Core ◽  
Compression Behavior ◽  
Measurement Systems ◽  
Compression Properties ◽  
Entire Structure ◽  
Core Thickness

The transverse compression property is one of most important aspects of the mechanical performance of a sandwich structure with a soft core. An experiment, analytical method and three digital strain measurement systems were applied to investigate the compression behavior and the failure mechanism for a wood-based sandwich structure with a novel Taiji honeycomb core. The results show that the structure of the Taiji honeycomb can improve dramatically on compression strength and modulus of composite compared to that of a traditional hexagonal one. There was no obvious deflection in the transverse direction detected by the three digital images before the buckling of the honeycomb occurred. An analytical equation between the key structure parameters and properties of the composite were applied to predict its threshold stresses and modulus. The properties of the core determine the strength of the entire structure, but the compression strength decreases slightly with an elevated core thickness, and its effect on the compression modulus can be neglected. Both the surface sheets and loading speed have little impact on the compression strength and modulus, respectively.

Flexural Behavior of Sandwich Structure with AA 8011 Honeycomb Core and Al 1100 Face Skins

2018 ◽  
Vol 10 (6) ◽  
Author(s):  
M.R. Ashok ◽  
M. Manojkumar ◽  
P.V. Inbanaathan ◽  
R. Shanmuga Prakash
Keyword(s):  
Finite Element Analysis ◽  
Sandwich Structure ◽  
Flexural Behavior ◽  
Bending Test ◽  
Honeycomb Core ◽  
Element Analysis ◽  
Three Point Bending ◽  
The Core ◽  
Flexural Testing ◽  
The Face

This paper details the fabrication and flexural testing of sandwich structure with Aluminium honeycomb core with Aluminium face skins. The material for the face skin is aluminium 1100 and for the core is Aluminium AA8011. The cell size obtained by fabrication is 7mm. The specimen is prepared and tested as per the ASTM standard C393/C393M-11 on a three-point bending test to obtain the ultimate core shear strength and the face skin strength. Finite element analysis is also carried out to validate the experimental test.

scholarly journals Flexural Behavior of Aluminum Honeycomb Core Sandwich Structure

2017 ◽  
Vol 197 ◽  
pp. 012046 ◽  
Author(s):  
Vidyasagar Matta ◽  
J Suresh Kumar ◽  
Duddu Venkataraviteja ◽  
Guggulla Bharath Kumar Reddy
Keyword(s):  
Sandwich Structure ◽  
Flexural Behavior ◽  
Honeycomb Core ◽  
Aluminum Honeycomb

Detection of Unbonds in Honeycomb Sandwich Structure Using Lock-In Thermography

2010 ◽  
Vol 97-101 ◽  
pp. 4363-4366
Author(s):  
Hui Liu ◽  
Jun Yan Liu ◽  
Yang Wang ◽  
Hui Juan Li
Keyword(s):  
Sandwich Structure ◽  
Sandwich Structures ◽  
Modulation Frequency ◽  
Influencing Factor ◽  
Face Sheet ◽  
Honeycomb Core ◽  
Honeycomb Sandwich ◽  
Testing Technology ◽  
Lock In ◽  
Honeycomb Sandwich Structure

Lock-in thermography (LT), that is active infrared testing technology, mainly includes optical lock-in thermography (OLT) and ultrasound lock-in thermography (ULT). LT can be used to detect unbonds between honeycomb core and face sheet of sandwich structures. However, modulation frequency is an important influencing factor. In this paper, the principles of LT are represented, in experimental detections of simulated unbonds in honeycomb sandwich structures with Al-face sheet and CFRP-face sheet using OLT and ULT, detectability of OLT and ULT is compared and analyzed, effect of modulation frequency is researched and the optimal frequencies are obtained.

scholarly journals Examination of Honeycomb Core Compliance in Sandwich Structure

2019 ◽  
Vol 2019 (11) ◽  
pp. 19-27
Author(s):  
Dominik Nowakowski ◽  
Marta Baran ◽  
Janusz Lisiecki ◽  
Sylwester Kłysz ◽  
Piotr Synaszko
Keyword(s):  
Compression Test ◽  
Sandwich Structure ◽  
Compressive Modulus ◽  
Honeycomb Core ◽  
Strength Parameters ◽  
Static Compression ◽  
Force Displacement

AbstractThe objective of the research presented in this paper was to determine the honeycomb core compliance of a sandwich structure of the horizontal stabilizer of the MiG-29 fighter jet in the static compression test. The study of the specimen was conducted based on the ASTM C365/C365M standard. The article presents the results of experimentally determined dependencies and strength parameters, i.e. the force-displacement dependence, the compressive modulus and the honeycomb core deformations.

Mechanical responses of a composite sandwich structure with Nomex honeycomb core

2019 ◽  
Vol 38 (13) ◽  
pp. 601-615 ◽  
Author(s):  
Yue Liu ◽  
Wei Liu ◽  
Weicheng Gao ◽  
Limeng Zhang ◽  
Enjie Zhang
Keyword(s):  
Sandwich Structure ◽  
Honeycomb Core ◽  
Mechanical Responses ◽  
Composite Sandwich ◽  
Nomex Honeycomb

Vibration Characteristics of Hybrid Honeycomb Core Sandwich Structure with FG-CNT Reinforced Polymer Composite Faces under Various Thermal Fields

2021 ◽  
Vol 21 (11) ◽  
Author(s):  
S. Swetha ◽  
P. Thamilselvi ◽  
Vinod Bhagat ◽  
M. P. Arunkumar
Keyword(s):  
Polymer Composite ◽  
Forced Vibration ◽  
Sandwich Structure ◽  
Thermal Environment ◽  
Vibration Characteristics ◽  
Temperature Fields ◽  
Honeycomb Core ◽  
Reinforced Polymer ◽  
Nonlinear Temperature ◽  
Composite Face

This paper presents the free and forced vibration characteristics of a hybrid honeycomb core sandwich structure consisting of a top and bottom FG-CNT reinforced polymer composite face sheet in a thermal environment. Different thermal fields like the uniform, linear and nonlinear temperature fields in the thermal environment along the thickness direction are considered to study the dynamic characteristics of the hybrid honeycomb core sandwich structure. The mathematical model is developed using Hamilton’s principle along with the third-order shear deformation theory. Five unknown modal coefficients are found using the modal superposition principle to calculate the forced vibration response. From the free and forced vibration results, it is observed that the FG-V[Formula: see text] grading pattern face sheets with lower cell size honeycomb core and with higher cell wall thickness honeycomb core show better vibration characteristics. It is noticed that the sandwich structure with honeycomb core and FG-V[Formula: see text] CNT reinforced polymer composite face has a higher critical buckling temperature in the thermal environment. Furthermore, for different percentages of critical buckling temperature, the natural frequencies and vibrating patterns for uniform, linear and nonlinear temperature fields are the same for the sandwich structure with UD, FG-V[Formula: see text] and FG-[Formula: see text]V CNT reinforced polymer composite faces. In addition, the resonant peak of the sandwich structure with FG-V[Formula: see text] CNT reinforced polymer composite face in nonlinear temperature field shifts more toward the right, while that of the uniform temperature field shifts more toward the left in the velocity response.

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