Search Results

1 - 10 of 21 items :

  • "adhesives" x
  • Mechanical Engineering x
Clear All
The Influence of Selected Adhesive Properties and the Manner of Surface Preparation upon Impact Strength of Block Adhesive Joints

wahadłowego . Technologia i Automatyzacja Montażu, No. 3/2016, pp. 56-60, 2016. [8] Samborski T., Zbrowski A., Metoda i urządzenie do badania udarności połączeń klejowych. Przegląd Mechaniczny, No. 6/2016 pp. 37-41, 2016. [9] Komorek A., Godzimirski J., The selected aspects of the research into impact loading of adhesive joints in block samples - comparison of different ways of applying the load , Problemy Eksploatacji, 4/2016, pp. 77-91, 2016. [10] Komorek A., Godzimirski J., Pietras A. Experimental and preliminary numerical dynamic analysis of effect

Open access
Investigation of Defect Effects on Adhesively Bonded Joint Strength Using Cohesive Zone Modeling

References [1] M. J. Lee, T. M. Cho, W. S. Kim, B. C. Lee, J. J. Lee. Determination of cohesive parameters for a mixed-mode cohesive zone model. International Journal of Adhesion and Adhesives 2010 (30), No. 5, pp. 322-328. [2] Y. H. Lai, M. D. Rakestraw, D. A. Dillard. The cracked lap shear specimen revisited-a closed form solution. International Journal of Solids and Structures 1996 (33), No. 12, pp. 1725-1743. [3] M. Goland, E. Reissner. The stresses in cemented joints. Journal of Applied Mechanics 1944 (66

Open access
The Problems of Ensure of Safe Labor Conditions on Workplaces for Adhesive Bonding

Abstract

In the performance a variety of technological operations a human may come into contact with a variety of factors causing deterioration of safety at work. As an example of which is described in article, adhesive bonding operations are requiring use of specific chemicals, which are adhesives. They are produced on the basis of a variety of compounds, often hazardous to human health. Furthermore, adhesive bonding requires a series of preparatory operations such as degreasing or surface preparation with a specific structure and roughness and auxiliary operations such as measurement of the wettability of surface. In this paper are described examples of risks occurring during adhesive bonding, it is a simple way to estimate the risks associated with the performance of operations. The examples of the determination by the producers of chemicals are described which are used in adhesive bonding and fragment of international chemical safety card (ICSC), as a source of information important to the workplace organization and ensuring safety during adhesive bonding.

Open access
On the Bonding Strength of Fe-Based Self-Fluxing Alloy Coating Deposited by Different Methods on the Steel Substrate

Abstract

In the present paper, the bonding strength of Fe-based self-fluxing alloy coating deposited by plasma spraying, gluing and laser remelting and alloying on the steel substrate have been investigated. When flame melting, a globular structure is formed. Against the background of the solid solution carbide-boride phases are clearly distinguishable, between which the Fe–Fe2B and Fe–FeB eutectic colonies are situated. Laser remelting leads to the formation of metastable structures, reinforced with dendrites, consisting of alloyed Fe-α and Fe-γ. At the low laser beam speeds the coating is melted completely with the formation of a cast structure with the dendrites. When the laser beam speed is increased, the dendritic structure gets fragmented. Structures of coatings alloyed with B4C and remelted by the laser beam vary with the increase of the spot speed. The bonding strength of coating without subsequent remelting decreases by 4–5 times in comparison with remelted. The bonding strength of the reinforced glue coating has adhesive and adhesive-cohesive character. When the load increases in the coating, microcracks develop, which gradually spread to the center of the bonding surface. For plasma coatings after laser remelting without additional alloying, the maximum bonding strength is observed with the minimum laser beam speed. With increasing the laser beam speed it decreases almost 1.5 times. In glue coatings reinforced with B4C particulates by laser remelting, the bonding strength is lower by 1.2–1.4 times in comparison with plasma coating.

Open access
Comparative Numerical Analysis of Different Strengthening Systems of Historical Brick Arches

Abstract

The article presents a comparative numerical analysis of various ways to strengthen historical brick arches. Five ways of strengthening brick arches with steel tie-rods have been proposed. Two of these involve the use of braces wrapped around pillars supporting the arch connected with a tie-rod; the other two ways involve the use of the tie-rods with welded metal sheets of different sizes; the latter involves the use of a tie-rod glued with the use of an epoxy adhesive. The collected data were compared with the reference model of the arch left without any interference. The results make it possible to evaluate the effectiveness of the methods by comparing displacements in the vertical and horizontal direction and stresses. The article indicates the direction of proper planning and design of the arch strengthening in brick structures in historical buildings.

Open access
Inverse Technique for the Viscoelastic Material Properties Characterisation

Abstract

New non-destructive technique, namely an inverse technique based on vibration tests, to characterize nonlinear mechanical properties of adhesive layers in sandwich composites has been developed. An adhesive layer is described as a viscoelastic isotropic material with storage and loss moduli which are both frequency dependent values in a wide frequency range. An optimization based on the planning of experiments and response surface technique to minimize the error functional is applied to decrease considerably the computational expenses. The developed identification technique has been successfully applied to characterize viscoelastic material properties of 3M damping polymer ISD-112 used as a core material in sandwich panels

Open access
Fem and Experimental Analysis of Thin-Walled Composite Elements Under Compression

, pp.52-56. [23] Rozylo P. and Wrzesinska K. (2016): Numerical analysis of the behavior of compressed thin-walled elements with holes. - Advances in Science and Technology Research Journal, vol.10, No.31, pp.199-206. [24] Rudawska A. and Debski H. (2011): Experimental and numerical analysis of adhesively bonded aluminium alloy sheets joints. - Maintenance and Reliability, vol.1, pp.4-10. [25] Singer J., Arbocz J. and Weller T. (1998): Buckling experiments. Experimental methods in buckling of thin-walled structure

Open access
Study on Breaking Load of Single Lap Joint Using Hybrid Joining Techniques for Alloy Steel AISI 4140 and Mild Steel: Taguchi and Neural Network Approach

force variations in Al2024-T3 interference fitted bolted joints under static and cyclic loading. Mater Des. 2012 (37), 128 - 136. [7] C. Hoang-Ngoc, E. Paroissien. Simulation of single-lap bonded and hybrid (bolted/bonded) joints with flexible adhesive. Int J Adhes Adhes. 2010 (30), 117 - 129. [8] T. Dang Hoang, C. Herbelot, A. Imad. On failure mode analysis in a bolted single lap joint under tension-shearing. Eng Fail Anal. 2012 (24), 9 - 25. [9] Q. M. Li, R. A. W. Mines, R. S. Birch. Static and dynamic behavior of

Open access
The Investigation of the Cavitation Phenomenon in the Laval Nozzle with Full and Partial Surface Wetting

-0-8155-1399-5. [16] F. Pochylý, L. Rinka: Surface energy in the boundary layer of the droplet and the solid surface, research report, VUT, 2007 [17] S. Fialová, F. Pochylý. Identification and experimental verification of the adhesive coefficient of hydrophobic materials, 18th International Seminar on Hydropower Plants, November 2014, Austria [18] Maklakov D. V., Suleimanov S. Z.: Jet Impingement on a Wall of Arbitrary Configuration. Fluid Dynamics. 2014 (49), No. 4. ISSN 0015 - 4628. [19] Z. Csuka, R. Olšiak, Z. Fuszko. Research of

Open access
Estimation of Material Properties of Carbon Nanotubes Using Finite Element Method

.1297 [13] Majid, J., Mohammad Reza, M. “Investigation of Defect Effects on Adhesively Bonded Joint Strength Using Cohesive Zone Modeling”, Strojnícky časopis – Journal of Mechanical Engineering 68 (3), pp. 5 – 24, 2018 . DOI: 10.2478/scjme-2018-0023 [14] Meo, M., Rossi, M. “Prediction of Young’s modulus of single wall carbon nanotubes by molecular-mechanics based finite element modelling”, Composites Science and Technology 66 (11), pp. 1597 – 1605, 2006 . DOI: 10.1016/j.compscitech.2005.11.015 [15] Pantano, A., M. Parks, D., Boyce, M. C. “Mechanics of

Open access