Water absorption mechanism and mechanical performance of adhesively joint aluminum alloy with GNP reinforced epoxy

2021 ◽  
Author(s):  
Nurziana Kong ◽  
Nur Zalikha Khalil
Keyword(s):  
Aluminum Alloy ◽  
Water Absorption ◽  
Mechanical Performance ◽  
Absorption Mechanism

Effects of Intensity of Alternating Electromagnetic Field on Microstructure and Property of ZL114A Aluminum Alloy Castings

2013 ◽  
Vol 278-280 ◽  
pp. 429-432
Author(s):  
Qing Song Yan ◽  
Yong Li ◽  
Gang Lu ◽  
Bai Ping Lu ◽  
Bo Wen Xiong ◽  
...  
Keyword(s):  
Grain Size ◽  
Electromagnetic Field ◽  
Aluminum Alloy ◽  
Mechanical Performance ◽  
Great Influence ◽  
Current Intensity ◽  
Alloy Castings

Through analyzing and testing the microstructure and property of ZL114A aluminum alloy castings under the condition of alternating electromagnetic field, the effects of the intensity of alternating electromagnetic field on the microstructure and property of ZL114A aluminum alloy castings are studied. The results showed the intensity of alternating electromagnetic field had a great influence on the microstructure and property of ZL114A aluminum alloy castings. With the increase of the intensity of alternating electromagnetic field, the grain size of ZL114A aluminum alloy was more and more small, under the 10A current intensity, the grain was the finest. Whereas, with the increase of the intensity of alternating electromagnetic field further, the grain is more and more big. Meanwhile, in a certain rang of current intensity, the mechanical performance of ZL114A aluminum alloy had been improved comprehensively, its tensile intensity was improved 10MPa and the elongation was increased by 30%.

scholarly journals A Quality Study of a Self-Piercing Riveted Joint between Vibration-Damping Aluminum Alloy and Dissimilar Materials

2020 ◽  
Vol 10 (17) ◽  
pp. 5947
Author(s):  
Dong Hyuck Kam ◽  
Taek Eon Jeong ◽  
Jedo Kim
Keyword(s):  
Aluminum Alloy ◽  
Failure Modes ◽  
Mechanical Performance ◽  
Dissimilar Materials ◽  
Vibration Damping ◽  
Shear Load ◽  
Load Testing ◽  
Tensile Shear ◽  
Reinforced Plastic ◽  
Riveted Joints

This study investigates the quality of self-piercing riveted joints between vibration-damping aluminum (Al) and other dissimilar materials, namely aluminum alloy (AL5052-H32), steel alloy (GA590DP), and carbon-reinforced plastic (CFRP). The effects of die types (flat, cone, and nipple) on the geometrical characteristics and mechanical performance of the joints are studied using a cross-section examination and tensile shear load testing. The failure modes of each joint are also presented, showing the nature of the forces leading to the joint failures. The results indicate that, for all configurations, adequate joining between vibration-damping Al with AL5052-H32 is expected with a maximum shear load up to 3.28 kN. A shear load up to 3.6 kN was measured for the joints with GA590DP panels with acceptable top and bottom seal characteristics. A vibration-damping Al panel can only be positioned at the bottom when riveting with CFRP due to the brittle nature of CFRP. A tensile shear load up to 2.26 kN was found, which is the lowest amongst the materials tested in this study.

scholarly journals Effect of Welding Speed on Defect Features and Mechanical Performance of Friction Stir Lap Welded 7B04 Aluminum Alloy

Metals ◽  
2016 ◽  
Vol 6 (4) ◽  
pp. 87 ◽  
Author(s):  
Huijie Zhang ◽  
Min Wang ◽  
Xiao Zhang ◽  
Zhi Zhu ◽  
Tao Yu ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Welding Speed ◽  
Mechanical Performance ◽  
Friction Stir

Study on Aluminum Alloy Helicopter Deck under Static Loads

2014 ◽  
Vol 926-930 ◽  
pp. 889-895
Author(s):  
An Tao Feng ◽  
Xin Gang Zhou
Keyword(s):  
Aluminum Alloy ◽  
Sandwich Panel ◽  
Static Load ◽  
Mechanical Performance ◽  
Fem Simulation ◽  
Fem Analysis ◽  
Test Results ◽  
Compressive Loads ◽  
Ultimate Load Carrying Capacity ◽  
Load Conditions

Test and study of aluminum alloy helicopter deck under static load were carried out. The deck is made of aluminum alloy sandwich panel. In the experiment, the deflection and stress of deck are measured under different static load conditions. Load conditions are determined by the conditions that helicopter berths at the deck. When helicopter berths at the deck, the deck endures vertical compressive loads on the deck surface and diagonal tension loads on the tie-down rod which is used to fasten the helicopter. According to the test results under different load conditions, the characteristic behavior and ultimate load carrying capacity were analyzed. Based on experimental results, FEM simulation was made. The results of FEM analysis was agreed with the test results very well. It is shown that the helicopter deck which is composed of aluminum alloy sandwich panel has good mechanical performance.

The Aluminum Brazing Pieces of Mechanical Performance Based on GRNN Neural Network

2013 ◽  
Vol 455 ◽  
pp. 154-158
Author(s):  
Xing Hua Liang ◽  
Lin Shi ◽  
Yu Si Liu ◽  
Xiao Ming Hua
Keyword(s):  
Neural Network ◽  
Mechanical Properties ◽  
Aluminum Alloy ◽  
Mechanical Performance ◽  
Orthogonal Experiment ◽  
Approximation Error ◽  
Orthogonal Test ◽  
Generalized Regression Neural Network ◽  
Absolute Value ◽  
Material Preparation

Aluminum and aluminum alloy were widely used in various industrial fields,the key to application is the reliable welding. In this thesis,LF21 aluminum alloy brazing materials were designed and prepared by Orthogonal experiment,and mechanical properties of the brazing specimen was tested. Based on the GRNN(Generalized Regression Neural Network),Nonlinear relationship modle of brazing material preparation parameters and mechanical properties of the weldment was established.The results show that the model has better stability.When smooth factor value is 0.1,the network approximation error and prediction error absolute value is 0.01%.It can be realized that an nonliner mapping between the aluminum alloy brazing preparation parameters and solder joint tensil strenth based on the Orthogonal test and can do better prediction of the weld mechanical properties,according to brazing material preparation parameters.

Modeling of water diffusion mechanism in polypropylene/date palm fiber composite materials

2018 ◽  
Vol 52 (19) ◽  
pp. 2651-2659 ◽  
Author(s):  
Sonia Boukettaya ◽  
Ahmad Alawar ◽  
Fahad Almaskari ◽  
Hachmi Ben Daly ◽  
Ahmed Abdala ◽  
...  
Keyword(s):  
Composite Materials ◽  
Water Absorption ◽  
Date Palm ◽  
Fiber Composite ◽  
Water Immersion ◽  
Diffusion Mechanism ◽  
Water Diffusion ◽  
Uptake Mechanism ◽  
Absorption Mechanism ◽  
Date Palm Fibers

The aim of this work is to model the water absorption mechanism of the polypropylene/date palm fibers composite materials after their exposure at different immersion conditions. For short immersion period, a model combining the Fick’s law and the time temperature stress principle has been proposed to describe the water absorption mechanism. However, it has been noted that, after a saturation time, the water diffusion mechanism leads to a physical degradation and a mass loss into the composite material, especially under high temperatures and long times of water immersion. Microscopic observations have revealed a decrease of the interfacial adhesion between the fibers and the matrix and fiber degradations. A general new model describing the evolution of the water uptake mechanism and the degradation phenomenon has been also proposed in the present work. A good agreement between the theoretical and experimental data has been obtained.

Development of Nano Modified Eco-Friendly Green Binders for Sustainable Construction Applications

2019 ◽  
Vol 24 ◽  
pp. 25-36 ◽  
Author(s):  
Hamada Shoukry
Keyword(s):  
Water Absorption ◽  
Mechanical Performance ◽  
Raw Material ◽  
Sustainable Construction ◽  
Partial Replacement ◽  
Cementitious Composites ◽  
Water Absorption Coefficient ◽  
Compressive And Flexural Strengths ◽  
Cement Manufacturing

Cement manufacturing, which is partially responsible for environmental and health risks as well as the greenhouse gas emissions, is a binder industry that needs energy and raw material. To decrease the needing, this study develops nano-modified eco-friendly cementitious composites including industrial solid wastes and/or by-products. For this purpose, ordinary Portland cement (OPC) was partially replaced with 70 wt% of fly ash (FA), Nano metakaolin (NMK) was incorporated at a rate of 2, 4, 6, 8, 10, 12 and 14 % as partial replacement by weight of FA to take advantage of the great role of nano materials in improving the mechanical and physical properties of cement based materials. Compressive strength, flexural strength, and capillary water absorption coefficient have been studied at 28 days of curing according to the international ASTM standards. Differential scanning calorimeter (DSC) was used to study the phase composition/decomposition. The microstructure characteristics of the hardened samples were investigated by scanning electron microscope (SEM) equipped with energy dispersive analytical x-ray unit (EDAX). The results revealed that the partial replacement of cement by 70% of FA has reduced both compressive and flexural strengths by about 45% in addition; the water absorption has been increased by about 175% as compared to the OPC. The replacement of FA by different amounts of NMK compensate for the loss in strength by about 75%. Furthermore, NMK has considerably improved the microstructure and reduced the water absorption by 86%. The study concluded that, it is possible to substitute 70% of the weight of the cement in the production of eco-friendly cementitious composites with improved mechanical performance attaining 88% of the corresponding performance of the hydrated OPC. The developed composites can be considered as green binders and recommended for various applications in construction industry.

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