Strength of Adhesive T-Joint under Moisture Condition

2015 ◽  
Vol 819 ◽  
pp. 437-442
Author(s):  
S. Nurhashima ◽  
M. Afendi ◽  
B. Izzawati ◽  
A. Nor ◽  
A.R. Abdullah ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Water Temperature ◽  
Adhesive Bonding ◽  
Moisture Absorption ◽  
Failure Load ◽  
Perforated Plate ◽  
Weight Percent ◽  
Epoxy Adhesive ◽  
Moisture Condition ◽  
Adhesive Thickness

In this study, an experimental investigation was conducted in order to determine the effect of moisture absorption at different adhesive thickness (i.e., 0.5, 1.0, 1.5 and 2.0 mm) on strength of adhesive T-joint in urea granulator fluidization bed. In particular, T-joint specimens were exposed to three humidity conditions, namely, 80°C, 90°C, and 100°C at a constant time immersion of 15 minutes in water. Stainless steel plate and stainless steel perforated plate were joined by using a specific adhesive jig according to desired thickness. Tensile test was conducted by using universal tensile machine (UTM) at room temperature. The result obtained has enabled to explain the failure mechanisms and characteristics of adhesive T-joint with respect to moisture condition and bonding thickness. Epoxy adhesive with several weight percent of water absorption will degrade the physical properties of the adhesive. Moisture condition has some effect on the strength of the adhesive bonding. 1.0 mm of adhesive thickness provides the highest value of failure load. Experimental results indicated that failure load of adhesive T-joint at room and 90°C water temperature give higher value of strength if compared to water temperature at 80°C and 100°C.

Study on Influence of Moisture Absorption Strength of Adhesive T-Joint

2014 ◽  
Vol 695 ◽  
pp. 663-666
Author(s):  
S. Nurhashima ◽  
Mohd Afendi ◽  
Basirom Izzawati ◽  
A. Nor ◽  
A.R. Abdullah ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Water Temperature ◽  
Adhesive Bonding ◽  
Moisture Absorption ◽  
Failure Load ◽  
Young Modulus ◽  
Epoxy Adhesive ◽  
Experimental Result ◽  
Moisture Condition ◽  
Welding Joint

Adhesive is commonly required to fulfil an explicit mechanical role where mechanical properties can affect their performance. The mechanical properties of adhesive are known to vary with moisture content. This paper presents a study of moisture absorption epoxy adhesive joint as alternative to welding joint in urea granulator chamber. Welding joint requires high skills to avoid joint failure. In particular, bulk specimens were exposed to three humidity conditions, namely, 80OC, 90OC, and 100OC at a constant time immersion of 15 minutes in water. Compression test revealed that Young modulus decreased with increasing water temperature. Moisture condition has some effect on the strength of the adhesive bonding with certain thickness. 1.0 mm of adhesive thickness provides the highest value failure load for every thickness and conditional water temperature. Experimental result indicated that failure load of adhesive T-joint at room and 90OC water temperature give relatively high value of strength if compared to water temperature at 80OC and 100OC.

Strength of Three-Point-Bending Ductile Adhesive Joint with Dissimilar Adherents

2014 ◽  
Vol 554 ◽  
pp. 406-410
Author(s):  
S. Nurhashima ◽  
Mohd Afendi ◽  
Basirom Izzawati ◽  
N.A.M. Amin ◽  
M.S. Abdul Majid ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Stainless Steel ◽  
Adhesive Joint ◽  
Adhesive Bonding ◽  
Failure Behavior ◽  
Three Point Bending ◽  
Different Types ◽  
Adhesive Thickness

In this study, an experimental investigation was conducted in order to determine the effect of different adhesive thickness (i.e., 0.1, 0.5, 0.7 and 1 mm) on strength of ductile adhesive joint. The study scope covers both experiment and analysis. In particular, two different types of material, aluminum and stainless steel as adherents were used and joined by using a specific adhesive jig. By using universal tensile machine (UTM), three-point-bending (3PB) test was conducted. To obtain the result from the experiment, continuous load is applied to the adhesive until the adhesive become fracture. The result obtained has enabled the clarification of failure behavior mechanisms and characteristics of adhesive bonding.

Adhesive joining of sisal/jute/hybrid composites with drilled holes in lap area

2020 ◽  
pp. 146442072095980
Author(s):  
Kassahun Gashu Melese ◽  
Tejas P Naik ◽  
Inderdeep Singh
Keyword(s):  
Adhesive Bonding ◽  
Failure Load ◽  
Natural Fiber ◽  
Hybrid Composites ◽  
Epoxy Adhesive ◽  
Fiber Reinforced Composites ◽  
Sisal Fiber ◽  
Reinforced Composites ◽  
Fiber Reinforced ◽  
Composite Joint

Growing awareness about sustainable development and the environmental problems involved in using nonbiodegradable materials has motivated the research community to develop environment-friendly materials. Developments have been achieved in the field of natural fibers and biopolymers, still there remain unanswered questions regarding the high-quality cost-effective manufacturing of natural fiber reinforced composites. The natural fiber-based polymeric composites are being used extensively in engineering applications, especially in the nonstructural parts and components. Near-net processing techniques such as compression molding, extrusion, and injection molding are well-developed for natural fiber reinforced composites. However, secondary processes such as joining, machining, and surface modification are still unexplored and need to be investigated in detail. The present research endeavor is an attempt to experimentally investigate the adhesive joining behavior of jute/sisal reinforced epoxy composites. The laminates based on three different material configurations in woven mat form, namely, pure jute, pure sisal, and hybrid jute/sisal reinforced epoxy have been fabricated by hand layup process. Different lap joint configurations with through holes in adherends overlapping area have been investigated. It has been established experimentally that the holes in the adherends provide a hinge-effect in the overlapping area and help in defining the failure load of the composite joint. The different arrangement of holes has been investigated and the best design of hole arrangement has been proposed for adhesive joining of jute/sisal fiber reinforced epoxy laminates. It was found that the holes (filled with an epoxy adhesive) in the overlap area result in 6–18% improvement in the failure load for different materials as compared to the joints with only adhesive bonding. Moreover, the field-emission scanning electron microscopy micrographs have been used to understand the failure mechanism of the adhesively bonded natural fiber reinforced composite laminates.

scholarly journals A replacement of chromate coating for adhesive bonding of stainless steel in a corrosive environment

2014 ◽  
Vol 3 (3) ◽  
pp. 396
Author(s):  
Khaled Alawadhi ◽  
Richard Brown ◽  
Jalal Alsarraf
Keyword(s):  
Stainless Steel ◽  
Adhesive Bonding ◽  
Salt Spray ◽  
Adhesive Layer ◽  
Epoxy Adhesive ◽  
General Purpose ◽  
Standard Test ◽  
Test Method ◽  
Adhesively Bonded ◽  
Chromate Coating

For adhesive bonding of stainless steel to itself, a surface treatment involving chromates is used. However, chromates are environmentally unfriendly so a replacement is being sought. In this paper, an alternative to chromate was investigated. The standard test method, ASTM D 1002, was used to measure the failure load of adhesively bonded stainless steel samples. A general-purpose epoxy adhesive was used. To simulate marine exposure, adhesively bonded samples were placed in a 5% salt spray for extended periods of time, up to five weeks. Results indicated that the initial shear strength of adhesive joints prepared with a traditional chromate preparation was 25% greater than the new, alternative coating. However, more importantly, the rate of decrease in strength with salt spray exposure was greater for the chromate than for the alternative. After 21 days, both bonding surface treatments had the same strength. However, after this period of time, the alternative was stronger than the chromate treatment, indicating that the alternative was a more durable coating. An adhesive/adherent coated system was investigated using a finite element method in order to investigate the influence of adhesive thickness between the adhesive and the adherent, and the residual stress in the adhesive layer. Keywords: Adhesive, Alternative Coating, Crevice Corrosion, Potentio-Dynamic, Salt Spray.

scholarly journals Accelerated Shape Forming and Recovering, Induction, and Release of Adhesiveness of Conductive Carbon Nanotube/Epoxy Composites by Joule Heating

Polymers ◽  
2020 ◽  
Vol 12 (5) ◽  
pp. 1030 ◽  
Author(s):  
Petr Slobodian ◽  
Pavel Riha ◽  
Robert Olejnik ◽  
Jiri Matyas
Keyword(s):  
Carbon Nanotube ◽  
Joule Heating ◽  
Adhesive Bonding ◽  
Recovery Process ◽  
Epoxy Adhesive ◽  
Porous Network ◽  
Mechanical And Electrical Properties ◽  
Multi Walled Carbon Nanotubes ◽  
Dc Current ◽  
Walled Carbon Nanotubes

The versatile properties of a nanopaper consisting of a porous network of multi-walled carbon nanotubes were applied to enhance the mechanical and electrical properties of a thermosetting epoxy polymer. The embedded nanopaper proved useful both in the monitoring of the curing process of the epoxy resin by the self-regulating Joule heating and in the supervising of tensile deformations of the composite by detecting changes in its electrical resistance. When heated by Joule heating above its glass transition temperature, the embedded carbon nanotube nanopaper accelerated not only the modelling of the composites into various shapes, but also the shape recovery process, wherein the stress in the nanopaper was released and the shape of the composite reverted to its original configuration. Lastly, in comparison with its respective epoxy adhesive, the internally heated electro-conductive carbon nanotube nanopaper/epoxy composite not only substantially shortened curing time while retaining comparable strength of the adhesive bonding of the steel surfaces, but also enabled a release of such bonds by repeated application of DC current.

Measuring of Damage Parameters in Adhesive Bonding

2006 ◽  
Vol 324-325 ◽  
pp. 275-278 ◽  
Author(s):  
I. Hilmy ◽  
M.M. Abdel Wahab ◽  
Ian A. Ashcroft ◽  
A.D. Crocombe
Keyword(s):  
Stress Level ◽  
Curve Fitting ◽  
Damage Mechanics ◽  
Adhesive Bonding ◽  
Low Cycle Fatigue ◽  
Extreme Points ◽  
Load Ratio ◽  
Continuum Damage Mechanics ◽  
Epoxy Adhesive ◽  
Least Square

In this paper, the characterisation of damage in an epoxy adhesive has been investigated. Bulk adhesive samples were used in this study for two reasons; firstly the stress distribution in the bulk adhesive sample is simpler than that in a joint, secondly, the specimen’s dimensions meet fatigue test specimen standards. Low cycle fatigue (LCF) tests with a load ratio of 0.1 and a frequency of 5 Hz were performed on bulk adhesive dumbbell specimens. Damage curves, relating damage in the specimen to number of cycles to failure, were plotted using an isotropic damage equation in which damage is a function of stress, which decreases as damage progresses. The damage curves were then fitted using a LCF damage evolution law. This equation was derived from a dissipation potential function using Continuum Damage Mechanics (CDM) theory. Curve fitting was performed using a Robust Least Square technique rather than ordinary linear least square because the damage curve has extreme points (usually at the breaking point). Two damage parameters α and β were found from the curve fitting process. This process resulted in different values of α and β for different stress levels. The logarithmic α and β points were then plotted respect against stress level and linear regression was used to determine α and β as a function of stress. With this function, damage parameters for other stress level can be predicted.

Adhesive bonding of titanium nitride-plated stainless steel for magnetic attachments

2001 ◽  
Vol 109 (3) ◽  
pp. 204-207 ◽  
Author(s):  
Yohsuke Taira ◽  
Kan-ichi Hai ◽  
Hideo Matsumura ◽  
Mitsuru Atsuta
Keyword(s):  
Stainless Steel ◽  
Titanium Nitride ◽  
Adhesive Bonding

scholarly journals Analysis of production parameters of single-lap bonds adhesive bonded with composites based on aluminium filler 

2017 ◽  
Vol 63 (No. 1) ◽  
pp. 36-44 ◽  
Author(s):  
Müller Miroslav
Keyword(s):  
Adhesive Bonding ◽  
Epoxy Adhesive ◽  
Polymer Particle ◽  
Material Strength ◽  
Adhesively Bonded ◽  
Metal Sheets ◽  
Bonded Joint ◽  
Negative Effect ◽  
Adhesively Bonded Joint ◽  
Agricultural Machines

In the area of bonding of sheets of metals, mainly in construction of transport and agricultural machines, single-lap bonds are used. In manufacturing corporations focused on bonding of the metal sheets the technologies such as riveting, welding and adhesive bonding are particularly used. These methods are frequently combined. The aim of the research was the evaluation of lap length of alloy AlCu4Mg adhesively bonded using two component epoxy adhesive, which is commonly used in construction of machines and its modification based in addition of filler in form of aluminium microparticles. The secondary aim of the research was to ascertain the influence of microparticle volume of aluminium filler on mechanical properties of polymer particle composite. Strength of adhesively bonded joint depends on the thickness of the bonded material. Strength of the adhesively bonded joint is dependent on the lapping length of adhesively bonded material. The highest values of strength of adhesively bonded joint were reached with the coefficient of the proportional length 0.27 ± 0.01. The assumption about negative effect of filler on tensile strength during the experiments was not confirmed. 

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