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 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.

scholarly journals Moisture Absorption Behavior and Adhesion Properties of GNP/Epoxy Nanocomposite Adhesives

Polymers ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 1850
Author(s):  
Nurziana Kong ◽  
Nur Zalikha Khalil ◽  
Holger Fricke
Keyword(s):  
Mechanical Properties ◽  
Shear Strength ◽  
Water Absorption ◽  
Water Uptake ◽  
Absorption Rate ◽  
Adhesive Bonding ◽  
Moisture Absorption ◽  
Adhesion Properties ◽  
Water Absorption Rate ◽  
Immersion Period

In the current work, an attempt has been made to investigate the effect of Graphene Nanoplatelets (GNP) reinforcement to water absorption behavior and mechanical properties of adhesive bonding with epoxy. Epoxy adhesive with various GNP content (i.e., 0.0~2.0 wt%) was utilized to joint aluminum adherend subjected to various immersion periods (i.e., 0~60 days). Subsequently, the effect of GNP reinforcement on water uptake, water absorption rate and tensile shear strength was investigated. Depending on GNP content, two distinct behaviors in water uptake and moisture absorption rate have been observed; specimens with lower GNP content (0.5~1.0 wt%) have demonstrated increased/retention of water uptake and water absorption rate regardless of immersion period. Meanwhile, at higher GNP content (1.5~2.0 wt%), decreased water uptake and water absorption rate are generally observed. At similar GNP content, regardless of immersion periods, water immersed specimens generally demonstrate higher or retention of shear strength when compared to specimens at 0-day immersion period. These observations suggest that the relation between moisture absorption behavior and mechanical properties of GNP-reinforced adhesive with GNP content are rather complex which might be attributed to the interplay of several possible mechanisms.

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 Tailoring a Low Young Modulus for a Beta Titanium Alloy by Combining Severe Plastic Deformation with Solution Treatment

Materials ◽  
2021 ◽  
Vol 14 (13) ◽  
pp. 3467
Author(s):  
Anna Nocivin ◽  
Doina Raducanu ◽  
Bogdan Vasile ◽  
Corneliu Trisca-Rusu ◽  
Elisabeta Mirela Cojocaru ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Mechanical Properties ◽  
Plastic Deformation ◽  
Severe Plastic Deformation ◽  
Young’S Modulus ◽  
Young's Modulus ◽  
Solution Treatment ◽  
Young Modulus ◽  
Orthopedic Implants ◽  
Beta Titanium Alloy

The present paper analyzed the microstructural characteristics and the mechanical properties of a Ti–Nb–Zr–Fe–O alloy of β-Ti type obtained by combining severe plastic deformation (SPD), for which the total reduction was of etot = 90%, with two variants of super-transus solution treatment (ST). The objective was to obtain a low Young’s modulus with sufficient high strength in purpose to use the alloy as a biomaterial for orthopedic implants. The microstructure analysis was conducted through X-ray diffraction (XRD), scanning electron microscopy (SEM), and high-resolution transmission electron microscopy (HRTEM) investigations. The analyzed mechanical properties reveal promising values for yield strength (YS) and ultimate tensile strength (UTS) of about 770 and 1100 MPa, respectively, with a low value of Young’s modulus of about 48–49 GPa. The conclusion is that satisfactory mechanical properties for this type of alloy can be obtained if considering a proper combination of SPD + ST parameters and a suitable content of β-stabilizing alloying elements, especially the Zr/Nb ratio.

scholarly journals Mechanical Properties of the Composite Material consisting of β-TCP and Alginate-Di-Aldehyde-Gelatin Hydrogel and Its Degradation Behavior

Materials ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1303
Author(s):  
Michael Seidenstuecker ◽  
Thomas Schmeichel ◽  
Lucas Ritschl ◽  
Johannes Vinke ◽  
Pia Schilling ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Protein Concentration ◽  
Failure Load ◽  
Testing Machine ◽  
Experimental Period ◽  
Flow Chamber ◽  
Degradation Behavior ◽  
Gelatin Hydrogel ◽  
Universal Testing

This work aimed to determine the influence of two hydrogels (alginate, alginate-di-aldehyde (ADA)/gelatin) on the mechanical strength of microporous ceramics, which have been loaded with these hydrogels. For this purpose, the compressive strength was determined using a Zwick Z005 universal testing machine. In addition, the degradation behavior according to ISO EN 10993-14 in TRIS buffer pH 5.0 and pH 7.4 over 60 days was determined, and its effects on the compressive strength were investigated. The loading was carried out by means of a flow-chamber. The weight of the samples (manufacturer: Robert Mathys Foundation (RMS) and Curasan) in TRIS solutions pH 5 and pH 7 increased within 4 h (mean 48 ± 32 mg) and then remained constant over the experimental period of 60 days. The determination surface roughness showed a decrease in the value for the ceramics incubated in TRIS compared to the untreated ceramics. In addition, an increase in protein concentration in solution was determined for ADA gelatin-loaded ceramics. The macroporous Curasan ceramic exhibited a maximum failure load of 29 ± 9.0 N, whereas the value for the microporous RMS ceramic was 931 ± 223 N. Filling the RMS ceramic with ADA gelatin increased the maximum failure load to 1114 ± 300 N. The Curasan ceramics were too fragile for loading. The maximum failure load decreased for the RMS ceramics to 686.55 ± 170 N by incubation in TRIS pH 7.4 and 651 ± 287 N at pH 5.0.

scholarly journals The impact of molded pulp product process on the mechanical properties of molded Bleached Chemi-Thermo-Mechanical Pulp

2021 ◽  
Vol 2 (1) ◽  
Author(s):  
Claire Dislaire ◽  
Yves Grohens ◽  
Bastien Seantier ◽  
Marion Muzy
Keyword(s):  
Mechanical Properties ◽  
Water Uptake ◽  
Process Parameters ◽  
Manufacturing Process ◽  
Water Immersion ◽  
Young Modulus ◽  
Drying Time ◽  
Mechanical Pulp ◽  
Hygroscopic Properties ◽  
The Impact

AbstractThis study was carried out using bleached softwood Chemi-Thermo-Mechanical Pulp to evaluate the influence of Molded Pulp Products’ manufacturing process parameters on the finished products’ mechanical and hygroscopic properties. A Taguchi table was done to make 8 tests with specific process parameters such as moulds temperature, pulping time, drying time, and pressing time. The results of these tests were used to obtain an optimized manufacturing process with improved mechanical properties and a lower water uptake after sorption analysis and water immersion. The optimized process parameters allowed us to improve the Young’ Modulus after 30h immersion of 58% and a water uptake reduction of 78% with the first 8 tests done.

Contamination and moisture absorption effects on the mechanical properties of catalyst coated membranes in PEM fuel cells

2012 ◽  
Vol 37 (8) ◽  
pp. 6790-6797 ◽  
Author(s):  
Ruiliang Jia ◽  
Siming Dong ◽  
Takuya Hasegawa ◽  
Jiping Ye ◽  
Reinhold H. Dauskardt
Keyword(s):  
Mechanical Properties ◽  
Fuel Cells ◽  
Moisture Absorption ◽  
Pem Fuel Cells ◽  
Coated Membranes
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