scholarly journals The study on bending performance of aluminum alloy honeycomb panel-beam composite grid structure

2020 ◽  
Vol 7 (7) ◽  
pp. 076522
Author(s):  
Gang Wang ◽  
Caiqi Zhao ◽  
Ye Gu ◽  
Jun Ma
Keyword(s):  
Aluminum Alloy ◽  
Grid Structure ◽  
Bending Performance ◽  
Composite Grid ◽  
Aluminum Alloy Honeycomb ◽  
Honeycomb Panel

Connection Performance of Bolted Aluminum Alloy Honeycomb Panel-Beam Composite Structure

2019 ◽  
Vol 821 ◽  
pp. 59-66
Author(s):  
Ye Gu ◽  
Cai Qi Zhao ◽  
Yong Yang ◽  
Wei Ran Zhao
Keyword(s):  
Finite Element ◽  
Aluminum Alloy ◽  
Composite Structure ◽  
Collaborative Work ◽  
Single Layer ◽  
Element Analysis ◽  
Normal Contact ◽  
Bolt Connection ◽  
Aluminum Alloy Honeycomb ◽  
Honeycomb Panel

A convenient and reliable connection between panels and beams was investigated for collaborative work of single-layer composite reticulated shell structure in which aluminum alloy honeycomb panels participate. In the paper, the "self-tapping bolt" connection was adopted to realize the "tight fit" performance of connection effectively in the composite structure. Through three groups of bearing capacity test on 1.5 m×3 m square meters of the aluminum alloy honeycomb panel-square tube beam combined structure, the force characteristics and failure mechanism of the structures were studied. The experimental results revealed that the connection method could ensure effective transmission between the panel and the beam which made them work in excellent condition. In order to simulate complex performance connection with the panel-beam composite structure, tangential and normal contact behavior were considered at the bolt connection point between the honeycomb panel and the beam in ABAQUS analysis. The analysis results illustrated that the finite element results had the highest matching degree with the experimental values when the friction coefficient of the joint boundary was 0.25. The finite element analysis of the connection bolts spacing indicated that the economic and excellent connection effect can be achieved when the spacing was about 90 mm.

Microstructure-Mechanical Properties Correlations in Composite Grid Structures

2013 ◽  
Vol 668 ◽  
pp. 630-634
Author(s):  
Xai Mei Lu ◽  
Yun Fei Ma
Keyword(s):  
Mechanical Properties ◽  
Impact Resistance ◽  
High Strength ◽  
Light Weight ◽  
Load Testing ◽  
Mechanical Behaviors ◽  
Grid Structure ◽  
Unit Cells ◽  
Composite Grid ◽  
Energy Absorbing

The composite grid structure, which is highly efficient and strongly designable, posses a variety of excellent performances， such as light weight, high strength, and inherent impact resistance. This paper used experimental methods to investigate the composite grid structure consisting of quadrilateral unit cells. The authors made nine specimens composed of different unit-cell sizes of the grid structure, through a series of static and dynamic load testing on them, examined and further analyzed their mechanical behaviors and energy-absorbing capabilities, as well as compared their mechanical properties, thus found specific (new) correlations between microstructures and mechanical properties in composite grid structures.

scholarly journals Investigation of Energy Absorbed by Composite Panels with Honeycomb Aluminum Alloy Core

Materials ◽  
2020 ◽  
Vol 13 (24) ◽  
pp. 5807
Author(s):  
Maciej Mogilski ◽  
Maciej Jabłoński ◽  
Martyna Deroszewska ◽  
Robert Saraczyn ◽  
Jan Tracz ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Fiber Reinforced Polymer ◽  
Bending Test ◽  
Composite Panels ◽  
Steel Tubes ◽  
Three Point Bending ◽  
Reinforced Polymer ◽  
Average Maximum ◽  
Aluminum Alloy Honeycomb ◽  
Better Than

The aim of this study was to measure the energy absorbed by composite panels with carbon fiber-reinforced polymer (CFRP) skins and a 5052 aluminum alloy honeycomb core and to compare it to previous research and isotropic material—two 25 × 1.75 mm 1.0562 alloy steel tubes. The panel skins layup consisted of pre-impregnated Pyrofil TR30S 210 gsm 3K 2 × 2 twill oriented in directions 0/90 and −45/45 and having a consolidated thickness of 1 mm or 2 mm. The core consisted of a 15 mm or 20 mm honeycomb oriented along its lengthwise direction. The first test consisted of a three-point bending of specimens supported at a span of 400 mm with a 50 mm radius tubular load applicator in the middle. Second, a perimeter shear test was conducted using a 25 mm diameter punch and a 38 mm diameter hole. The results of the three-point bending test show that the energy absorbed by panels with 1 mm skins was similar to the energy absorbed by the tubes (96 J), which was better than the previously considered panels. In the case of perimeter shear, the average maximum forces for the top and bottom skin were 5.7 kN and 6.6 kN, respectively. For the panel with thicker skins (2 mm), the results were about 2 times higher.

scholarly journals Bonded Repair Optimization of Cracked Aluminum Alloy Plate by Microwave Cured Carbon-Aramid Fiber/Epoxy Sandwich Composite Patch

Materials ◽  
2019 ◽  
Vol 12 (10) ◽  
pp. 1655 ◽  
Author(s):  
Xiaoyan Liu ◽  
Jiacheng Wu ◽  
Jiaojiao Xi ◽  
Zhiqiang Yu
Keyword(s):  
Aluminum Alloy ◽  
Carbon Fiber ◽  
Mechanical Performance ◽  
Aramid Fiber ◽  
Sandwich Composite ◽  
Fiber Reinforced ◽  
Alloy Plate ◽  
Bending Performance ◽  
Bonded Repair ◽  
Aluminum Alloy Plate

Fiber-reinforced epoxy sandwich composites, which were designed as the bonded repair patches to better recover the mechanical performance of a central cracked aluminum alloy plate, were layered by carbon and aramid fiber layers jointly and cured by microwave method in this study. The static tensile and bending properties of both carbon-aramid fiber/epoxy sandwich composite patches and the cracked aluminum alloy plates after bonded repair were systematically investigated. By comparing the mechanical performance with traditional single carbon-fiber-reinforced composite patches, it can be found that the bending performance of carbon-aramid fiber sandwich composite patches was effectively improved after incorporation of flexible aramid fiber layers into the carbon fiber layers, but the tensile strength of sandwich composite patches was weakened to some extent. Especially, the sandwich patches with 3 fiber layers exhibited better tensile and bending performance in comparison to patches of 5 and 7 fiber layers. The optimized 3-layer carbon-aramid fiber sandwich patch repaired plate recovered 86% and 190% of the tensile and bending performance in comparison to the uncracked ones, respectively, showing a considerable repair majorization effect for the cracked aluminum alloy plate.

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