scholarly journals Mechanical Properties and Leak-Tightness of Polymeric Pipe Adhesive Joints

2022 ◽  
Vol 3 (1) ◽  
pp. 64-77
Author(s):  
Anna Rudawska ◽  
Magd Abdel Wahab ◽  
Miroslav Müller ◽  
Dana Stančeková
Keyword(s):  
Mechanical Properties ◽  
Polyvinyl Chloride ◽  
Epoxy Adhesive ◽  
Adhesive Joints ◽  
Cyanoacrylate Adhesive ◽  
Strength Tests ◽  
Two Component ◽  
Leak Tightness

This paper presents issues related to the determination of the selected mechanical properties of adhesive joints made of polymeric pipes and the evaluation of the leak-tightness of the adhesive joints. The article attempts to demonstrate that the type of adhesive may affect the quality of adhesive joints in terms of both tightness and strength of joints. Five types of the polymer pipes differing in a polypropylene and a polyvinyl chloride, diameter and a wall thickness were used in the experiments. Two types of the adhesives were used to make the adhesive joints: Loctite 3430 A&B Hysol, a two-component epoxy adhesive, and Loctite 406, a one-component cyanoacrylate adhesive. Based on the leak-tightness tests results, it was possible to determine the quality of their adhesive joints without damaging the samples, while their tensile strength was determined through the strength tests. The tests performed allowed for the conclusion that the use of the polyvinyl chloride pipes and Loctite 406 one-component adhesive is recommended for this type of adhesive joints.

scholarly journals Mechanical Properties of Selected Epoxy Adhesive and Adhesive Joints of Steel Sheets

2021 ◽  
Vol 2 (1) ◽  
pp. 108-126
Author(s):  
Anna Rudawska
Keyword(s):  
Mechanical Properties ◽  
Epoxy Resin ◽  
Experimental Tests ◽  
Epoxy Adhesive ◽  
Adhesive Joints ◽  
Stoichiometric Ratio ◽  
Curing Agent ◽  
Steel Sheets ◽  
Epoxy Adhesives ◽  
Strength Tests

The article presents the issues of the mechanical properties of epoxy adhesives and the adhesive joints strength of steel sheets which were made using the epoxy adhesives. The aim of the paper is to study the mechanical properties of epoxy adhesive of different epoxy resin/curing agent ratios (within and above the recommended stoichiometric ratio) and their effect on mechanical properties of adhesive joints of steel sheets. In experimental tests three types of epoxy adhesives, containing a low molecular weight epoxy resin based on bisphenol A and polyamide curing agent, were used. A single-lap adhesive joint type of stainless-steel sheets was also applied. Two types of strength test were used: the compressive strength tests (DIN EN 196-1) for epoxy adhesive samples and the shear strength tests (DIN EN 1465) for adhesive joints. Both the analysis of the strength results of the samples of epoxy adhesive and adhesive joints as well as the failure analysis was carried out. On the basis of the results of strength tests it can be stated that the greatest deformation occurred for the samples of epoxy adhesive containing the modified epoxy resin (epoxy number—0.40) and the polyamide curing agent, and the smallest for the samples of epoxy adhesive containing the basic epoxy resin (epoxy number—0.49–0.52) and the polyamide curing agent. The epoxy adhesives with a smaller amount of curing agent were characterized by higher strength. This applies to all analyzed epoxy resins. The same dependences were obtained for the strength of adhesive joints of steel sheets made of the analyzed epoxy adhesive.

scholarly journals Influence of Surface Treatment on Steel Adhesive Joints Strength—Varnish Coats

Materials ◽  
2021 ◽  
Vol 14 (22) ◽  
pp. 6938
Author(s):  
Anna Rudawska ◽  
Izabela Miturska-Barańska ◽  
Elżbieta Doluk
Keyword(s):  
Shear Strength ◽  
Surface Treatment ◽  
Epoxy Adhesive ◽  
Adhesive Joints ◽  
Steel Sheets ◽  
Lower Shear ◽  
Cyanoacrylate Adhesive ◽  
Strength Tests ◽  
The Impact ◽  
Iso 25178

The purpose of the paper is to determine the impact of surface treatment on the strength of adhesive joints, made from various steel sheets. Two variants of the surface treatment steel adherends were used: without the varnish coat and with the varnish coat, using three polymer-based varnishes (a simple, a hybrid, and a gel). Two types of the adhesives were used to prepare the adhesive joints: a single-component cyanoacrylate adhesive and a two-component epoxy adhesive. A strength test of the adhesive joints (EN DIN 1465 standard), a coating adhesion test (ASTM D3359-B standard), and surface topography, as well as surface roughness, parameters (PN-EN ISO 11562, PN-EN ISO 4287, and PN-EN ISO 25178 standards) were used. Based on the strength tests, it was observed that the adhesive joints, with the hybrid varnish onto the adherend’s surface, achieved markedly lower shear strength. The best results, in terms of the adhesive joint strength, made using the cyanoacrylate adhesive were achieved for the joints where the adherends were coated with a simple varnish, while in the joints made using the epoxy adhesive, the highest shear strength was achieved by the joints of sheets whose surfaces were coated with the gel varnish.

Study of Residual Stresses Distribution Generated from Milling of Magnesium Alloy Parts

2014 ◽  
Vol 657 ◽  
pp. 18-22 ◽  
Author(s):  
Bogdan Chirita ◽  
Nicolae Catalin Tampu
Keyword(s):  
Mechanical Properties ◽  
Magnesium Alloy ◽  
Residual Stresses ◽  
Surface Quality ◽  
Specific Weight ◽  
Superficial Layer ◽  
Medical Industry ◽  
Alloy Part

Magnesium alloys exhibit a very good ratio of mechanical properties versus specific weight, thus making it an important choice for parts used in automotive, aeronautic and medical industry. The distribution of residual stress in the superficial layer of the material is regarded as one of the factors defining the surface quality of a machined part. It is therefore important to know this distribution as it is closely related to fatigue and corrosion resistance, especially for the parts working in aggressive environments (i.e. biomedical devices). The present paper focuses on the determination of the residual stresses induced in a magnesium alloy part processed by milling, and their effects on surface quality.

EFFECT OF PETROLOGICAL FEATURES ON MECHANICAL PROPERTIES OF ROCK SALT FROM THE LGOM (LEGNICA–GŁOGÓW COPPER DISTRICT)

2016 ◽  
pp. 51-64 ◽  
Author(s):  
Katarzyna CYRAN ◽  
Tomasz TOBOŁA ◽  
Paweł KAMIŃSKI
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Uniaxial Compressive Strength ◽  
Rock Salt ◽  
Fluid Inclusions ◽  
Mechanical Parameters ◽  
Research Results ◽  
Strength Tests ◽  
Crystal Boundaries

The paper presents the attempt to find a correlation between the content of impurities and mechanical parameters of rock salt from the LGOM. Research was carried out in three steps: uniaxial compressive strength tests, determination of the content of insoluble minerals (impurities), and observations under the microscope and Raman microspectroscopy. The research results reveal that the rock salt which is characterized by low content of insoluble minerals (0.13–2.11% wt.) shows no correlation between the mechanical properties and the content of impurities. However, it was found that mechanical properties depend on both the distribution of impurities in halite crystals and the presence of fluid inclusions and hydrocarbons along the crystal boundaries. Moreover, the distribution of anhydrite at the edges of halite crystals may influence an increase of rock salt strength. On the contrary, the presence of fluid inclusions and hydrocarbons along the halite crystal boundaries may reduce the rock salt strength.

Testing Research of Physical and Mechanical Properties of Snows on Railroad Switch

2013 ◽  
Vol 380-384 ◽  
pp. 4387-4390 ◽  
Author(s):  
Cun Yuan Mu ◽  
Bo Feng ◽  
Ming Ge Sui ◽  
An Min Wang
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Ambient Temperature ◽  
Conservation Status ◽  
Physical And Mechanical Properties ◽  
Quality Parameters ◽  
Snow Density ◽  
Strength Tests ◽  
Railway Turnout

The conservation status of the railway turnout junctions were analyzed, the hardness, density, compressive strength tests of snow squeezed by railway turnout junctions were studied, thus reaching a conclusion that different quality of snow owns different hardness and densities. For new snow ( or loose snow) whose density ρ = 0.3g/cm2, snow compressive strength is small; when the compacted snow density ρ > 0.3g/cm2, the regulation of snow compressive strength should be the snow compressive strength improve with decreasing temperature, while the denser the snow density is and the lower ambient temperature is, the faster the snow increase compressive strength. All these provided the snow quality parameters for the design of railway turnout junction snow cleaning machines and tools.

scholarly journals Influence of Vibrations During Crystallization on Mechanical Properties and Porosity of EN AC-AlSi17 Alloy

2013 ◽  
Vol 13 (1) ◽  
pp. 5-18 ◽  
Author(s):  
T. Ciućka
Keyword(s):  
Mechanical Properties ◽  
Adverse Effect ◽  
Tilt Angle ◽  
The Other ◽  
Strength Tests ◽  
New Ideas ◽  
Machining Operations ◽  
Technology Of Production

Abstract Today’s industry aims at such situation, where number of defective products, so called defects shall approach to zero. Therefore, one introduces a various changes in technology of production, introduces improvements which would help in accomplishment of this objective. Another important factor is introduction of different type of testing, which shall help in assessment which factor has significant effect on quantity of rejects, and which one could be neglected. Existence of casting rejects is unavoidable; therefore a new ideas, technologies and innovations are necessary in the entire widely understood foundry branch, in order to minimize such adverse effect. Performance of tests aimed at unequivocal determination of an effect of vibrations during crystallization on mechanical properties and porosity of the EN ACAlSi17 alloy was the objective of the present work. To do this, there were produced 36 castings from EN AC-AlSi17 alloy. All the castings underwent machining operations. Half of the casting was destined to strength tests, the other half served to determination of an effect of vibrations on porosity of the alloy. The specimens were divided into 12 groups, depending on amplitude of vibrations and tilt angle of metal mould during pouring operation.

scholarly journals The Effect of the Salt Water Aging on the Mechanical Properties of Epoxy Adhesives Compounds

Polymers ◽  
2020 ◽  
Vol 12 (4) ◽  
pp. 843 ◽  
Author(s):  
Anna Rudawska
Keyword(s):  
Mechanical Properties ◽  
Calcium Carbonate ◽  
Salt Water ◽  
Tap Water ◽  
Testing Machine ◽  
Epoxy Adhesive ◽  
Curing Agent ◽  
Epoxy Adhesives ◽  
Adhesive Compound ◽  
Strength Tests

The objective of this study is to compare the effect of selected operating factors on the mechanical properties of epoxy adhesive compounds aged in salt water. Five different water environments were tested: tap water, normal seawater (reference salinity value), seawater with double reference salinity value, seawater with half of the reference salinity and seawater with a quarter of the reference salinity value. Samples of two different adhesive compounds were prepared using the epoxy resin and triethylenetetramine curing agent. One of the compounds was filled with calcium carbonate. The samples were aged in five different water environments for three months, one month and one week, respectively. Mechanical properties of the cured adhesive compound samples were determined via strength tests performed on the Zwick/Roell Z150 testing machine in compliance with the EN ISO 604 standard. The objective of the experiments was to determine the effect of different seawater environments on selected mechanical properties (including strength) of the fabricated adhesive compounds.

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