Behavior of Indented Sandwiches Structure with Nomex Honeycomb Core and Metallic Skins Subjected to Compressive Loading (CAI)

2007 ◽  
pp. 729-732
Author(s):  
Y. Aminanda ◽  
B. Castanie ◽  
J.J. Barrau
Keyword(s):  
Compressive Loading ◽  
Honeycomb Core ◽  
Nomex Honeycomb

Numerical Analysis and Mechanical Properties of Nomex™ Honeycomb Core

2017 ◽  
Author(s):  
Yue Liu ◽  
Weicheng Gao ◽  
Wei Liu ◽  
Zhou Hua
Keyword(s):  
Compressive Strength ◽  
Cell Walls ◽  
Mechanical Response ◽  
Compressive Loading ◽  
Fe Model ◽  
Honeycomb Core ◽  
Practical Applications ◽  
Honeycomb Sandwich ◽  
Nomex Honeycomb ◽  
Strength And Stiffness

This paper presents an investigation on the mechanical response of the Nomex honeycomb core subjected to flatwise compressive loading. Thin plate elastic in-plane compressive buckling theory is used to analyze the Nomex honeycomb core cell wall. A mesoscopic finite element (FE) model of honeycomb sandwich structure with the Nomex honeycomb cell walls is established by employing ABAQUS/Explicit shell elements. The compressive strength and compressive stiffness of Nomex honeycomb core with different heights and thickness of cell walls, i.e. double cell walls and single cell walls, are analyzed numerically using the FE model. Flatwise compressive tests are also carried out on bare honeycomb cores to validate the numerical method. The results suggest that the compressive strength and compression stiffness are related to the geometric dimensions of the honeycomb core. The Nomex honeycomb core with a height of 6 mm has a higher strength than that of 8 mm. In addition, the honeycomb core with lower height possesses stronger anti-instability ability, including the compressive strength and stiffness. The proposed mesoscopic model can effectively simulate the crushing process of Nomex honeycomb core and accurately predict the strength and stiffness of honeycomb sandwich panels. Our work is instructive to the practical applications in engineering.

Behavior of Indented Sandwiches Structure with Nomex Honeycomb Core and Metallic Skins Subjected to Compressive Loading (CAI)

2007 ◽  
Vol 345-346 ◽  
pp. 729-732
Author(s):  
Y. Aminanda ◽  
B. Castanie ◽  
J.J. Barrau
Keyword(s):  
Residual Strength ◽  
Compressive Loading ◽  
Element Model ◽  
Honeycomb Core ◽  
Uniform Compression ◽  
Compression Load ◽  
Damage Area ◽  
Result Show ◽  
Nomex Honeycomb ◽  
Test Result

A finite element model is proposed to determine the residual strength and the evolution of damage area of indented sandwiches structures with Nomex honeycomb core and metallic skins indented by a spherical indenter under longitudinal compression load (CAI). The honeycomb is represented by a grid of non-linear springs which its behavior law is obtained by performing simple transverse uniform compression test on a block of honeycomb alone.The comparisons between computation and test result show that the model can simulate accurately the form of damage geometry during indentation, its residual print when the load is relieved (relaxation) and the residual strength and the evolution of damage geometry during CAI.

Quasi-Static Failure Analysis of Honeycomb Sandwich Beam with Composite Facesheets

2010 ◽  
Vol 160-162 ◽  
pp. 855-859 ◽  
Author(s):  
Li Qing Meng ◽  
Yan Wu ◽  
Shi Zhe Chen ◽  
Xue Feng Shu
Keyword(s):  
Sandwich Beam ◽  
Indentation Test ◽  
Core Material ◽  
Honeycomb Core ◽  
Three Point Bending ◽  
Composite Sandwich ◽  
Sandwich Construction ◽  
Honeycomb Sandwich ◽  
Nomex Honeycomb ◽  
Static Failure

Sandwich construction consists of two thin composite or metal facesheets separated by a core material. Despite extensive researches on the sandwich constructions, their mechanical properties and failure behaviours are still not fully understand. The objective of the paper is to use a experimental and theoretical predicting failure mode for sandwich beam consisting of GFRP facesheets and Nomex honeycomb core. Two kinds of composite sandwich beams are observed in quasi-static three-point bending and indentation test.

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

The Study of Resonant Frequency of Horn and Circular Tool of Ultrasonic Milling System

2014 ◽  
Vol 628 ◽  
pp. 283-286
Author(s):  
Yun Dian Zhang ◽  
Zhong Qiu Ma
Keyword(s):  
Resonant Frequency ◽  
Analytic Method ◽  
Test Results ◽  
Honeycomb Core ◽  
Design Requirement ◽  
Network Method ◽  
Ultrasonic Milling ◽  
Nomex Honeycomb ◽  
Transition Type ◽  
Ansys Workbench

Based on the traditional analytic method and four-end network method, a tapered transition-type ultrasonic horn is designed and analyzed by ANSYS Workbench software. The composite horn avoids the limitations of single-horn and the resonant frequency of the horn is good to meet the design requirement. Through the ANSYS Workbench , the circular tool used for cutting the Nomex honeycomb core materials is analyzed. The test results shows that the resonant frequency of the circular tool is too small to meet the design requirement when the tool have a good modes. But after the optimize design by the Six Sigma in ANSYS Workbench, the resonant frequency of the tool is good for meeting the demands of the design and production and processing.

Influence of the Honeycomb Geometry on the Sandwich Composite Plate Behavior

2017 ◽  
Vol 1143 ◽  
pp. 139-144 ◽  
Author(s):  
Florentina Rotaru ◽  
Ionel Chirica ◽  
Elena Felicia Beznea
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Sandwich Plate ◽  
Compressive Loading ◽  
Sandwich Composite ◽  
Orthotropic Materials ◽  
Honeycomb Core ◽  
Element Analysis ◽  
Composite Sandwich ◽  
The Impact

In this paper the influence cell honeycomb geometry on the mechanical behaviour of a composite sandwich plate is analyzed. Three cell geometries (circular, hexagonal and square) are static analysed so that to select the best type of honeycomb that will be used in the manufacturing the sandwich plate core. The main aim is to develop approach models of equivalent orthotropic materials to replace the real model of honeycomb core with their properties so that to quickly calculate the sandwich plate made out of composite when is used a finite element analysis code. Geometry and material properties of the honeycomb are delivered by the material provider. Comparative analysis, by using Finite element analysis is performed for all geometries, in the same boundary conditions. Since in the impact loading of the composite sandwich plate the core is mainly loaded to compression, comparative study of the three cell geometries honeycomb was performed for this type of compressive loading. Since the cell is the basic element of the honeycomb core, the calculus is performed for one unit volume of sandwich, concerning also the part of skins.

Study on the behavior law when milling the material of the Nomex honeycomb core

2021 ◽  
Author(s):  
Tarik Zarrouk ◽  
Jamal-Eddine Salhi ◽  
Samir Atlati ◽  
Mohammed Nouari ◽  
Merzouki Salhi ◽  
...  
Keyword(s):  
Honeycomb Core ◽  
Nomex Honeycomb
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