scholarly journals Evaluation of factors influencing adhesive bond strength

2012 ◽  
Vol 52 (No. 1) ◽  
pp. 30-37 ◽  
Author(s):  
M. Müller ◽  
P. Hrabě ◽  
R. Chotěborský ◽  
D. Herák
Keyword(s):  
Manufacturing Industry ◽  
Cost Savings ◽  
Adhesive Bond ◽  
Industrial Applications ◽  
Bonded Joints ◽  
Affecting Factors ◽  
Epoxy Adhesives ◽  
Bonded Joint ◽  
Successful Design ◽  
Bonding Technology

In the last ten years periods the bonding technology noted a great boom not only in manufacturing industry but in repairing industry, too. The expansion of chemical industry is the cause of this boom. In this way the use of bonding technology in industrial applications brings considerable cost savings. For the successful use of adhesives the knowledge of used adhesives and of further affecting factors is important. Respecting of this know-how is the presumption of the bonded joint successful design. The breaking of the technological procedure and the incorrect design are very often reasons of wrong joints. The paper contains theoretical in formation about the bonded joints creation and some results of laboratory tests inquiring into the reasons which affect the bonded joint strength. For tests the two-component epoxy adhesives were used.

Effect of Strain Rate on Mechanical Properties of Two-Component Epoxy Adhesive Bond

2014 ◽  
Vol 1059 ◽  
pp. 91-97
Author(s):  
Jan Cidlina ◽  
Jozef Žarnovský ◽  
Miroslav Müller
Keyword(s):  
Strain Rate ◽  
Failure Time ◽  
Adhesive Bond ◽  
Epoxy Adhesive ◽  
Time To Failure ◽  
Bonded Joints ◽  
Affecting Factors ◽  
Epoxy Adhesives ◽  
Adhesive Bonded Joints ◽  
Basic Standard

In practice, adhesive bonded joints are loaded by different intensity and rate. In the case where bond bearing capacity is exceeded, failure occurs. One of the affecting factors is strain rate. In the laboratory tests, ČSN EN 1465 is used as a basic standard, specifying the rate of deformation in the interval of 65±20 seconds. The goal of this research is to describe the behaviour of two-part epoxy adhesives at different strain rate of bonded joints. Experiments evaluated the changes of bond strength, deformation and time to failure. Time to failure is particularly significant because of the potential consequences of fast structural joint violation.

scholarly journals Technological and constructional aspects affecting bonded joints

2008 ◽  
Vol 53 (No. 2) ◽  
pp. 67-74 ◽  
Author(s):  
M. Müller ◽  
R. Chotěborský ◽  
J. Krmela
Keyword(s):  
Bond Strength ◽  
Laboratory Experiments ◽  
Adhesive Bonding ◽  
Adhesive Bond ◽  
Bonded Joints ◽  
Metallic Materials ◽  
Very Old ◽  
Number Of Factors ◽  
Bonding Technology ◽  
Adhesive Bond Strength

Adhesive bonding is one of many materials connecting methods. In the last ten years periods the bonding technology noted a boom almost in all industrial branches. The use of bonding technology in the engineering and repairing industry brings considerable savings. Saving in costs, in critical metallic materials and in time are reached and the decrease of the joint weight, too. Therefore the bonding technology pertains to the modern jointing methods even though it is a very old technique. The adhesive bonding technology is influenced by a number of factors which affect the adhesive bond strength. Correcting coefficients have to be considered in construction calculations too. The correcting coefficients correct the strength deviations caused by particular factors. In the paper there are published laboratory experiments results.

scholarly journals Degradation medium of agrocomplex – adhesive bonded joints interaction

2012 ◽  
Vol 58 (No. 3) ◽  
pp. 83-91 ◽  
Author(s):  
M. Müller ◽  
P. Valášek
Keyword(s):  
Adhesive Bonding ◽  
Adhesive Layer ◽  
Adhesive Bond ◽  
Bonded Joints ◽  
Technology Application ◽  
Degradation Processes ◽  
Current Interaction ◽  
Bonding Technology ◽  
Degradation Medium ◽  
Adhesive Bonded Joints

Research of degradation medium occurring in agrocomplex at the current interaction with bonded joints strength and lifetime is desired owing to the possibilities of bonding applications in this dynamically developing field. The bonding technology is used in construction of machines, lines and devices of agriculture, forestry and food industry. Among the perspectives of bonding technologies the adhesive bonding can be considered thanks to its predominant pluses. At the bonding technology or more precisely adhesive bonding technology application the limits must be characterized, which occur in the process of application in the concrete medium. On the basis of characteristics and analyses the countermeasures eliminating the negative factors can be taken. Published results set themselves the goal to know degradation processes taking place in bonded joints contemporarily with taking account of adhesive/adherend interaction with accent on application in agriculture. Experimentally found results confirm the presumption of a significant portion of the adhesive layer on the adhesive bond strength decrease in the practice due to the degradation processes.

scholarly journals Influence of surface integrity on bonding process

2011 ◽  
Vol 57 (No. 4) ◽  
pp. 153-162 ◽  
Author(s):  
M. Müller
Keyword(s):  
Surface Integrity ◽  
Adhesive Bonding ◽  
Bonding Process ◽  
Bonded Joints ◽  
Shot Blasting ◽  
Liquid Motion ◽  
Mechanical Preparation ◽  
Bonded Joint ◽  
Bonding Technology ◽  
Joint Quality

Adhesive bonding technology is successfully applied partly in the primary production, partly in the renovation in various fields of human activities. This fact emphasizes the importance of the partial factors research, which influence is essential for the quality, reliability and necessarily the usable life of bonded joints. The mechanical preparation of bonded surface is a varied process which influences directly the resultant bonded joint quality. The aim of the bonded surface mechanical preparation is the adhesion improvement in the adhesive – adherend interface. For mechanical preparation we use tools of defined cutting edge, by means of which we get the uniform surface texture, e.g. by milling. On the contrary such methods are more often used when the uniform surface cannot be reached. Shot blasting and grinding are significant representatives of these methods. The manual grinding can be significantly applied mainly in the agriculture. The absence of connected areas availability for the mechanical tooling and impossibility of their work clamping are the reasons for that. The breakwater in the sprinkler cistern restricting the liquid motion is the example.

scholarly journals The effect of modified tannic acid (TA) eco-epoxy adhesives on mode I fracture toughness of bonded joints

2021 ◽  
Vol 96 ◽  
pp. 107122
Author(s):  
Mohamed Nasr Saleh ◽  
Nataša Z. Tomić ◽  
Aleksandar Marinković ◽  
Sofia Teixeira de Freitas
Keyword(s):  
Fracture Toughness ◽  
Tannic Acid ◽  
Mode I ◽  
Bonded Joints ◽  
Mode I Fracture ◽  
Mode I Fracture Toughness ◽  
Epoxy Adhesives

scholarly journals Adhesively bonded joints of jute, glass and hybrid jute/glass fibre-reinforced polymer composites for automotive industry

2021 ◽  
Vol 9 (1) ◽  
Author(s):  
H. F. M. de Queiroz ◽  
M. D. Banea ◽  
D. K. K. Cavalcanti
Keyword(s):  
Automotive Industry ◽  
Failure Load ◽  
Natural Fibre ◽  
Bonded Joints ◽  
Adhesively Bonded ◽  
Adhesively Bonded Joints ◽  
Reinforced Polymer ◽  
Fibre Composites ◽  
Bonded Joint ◽  
Fibre Reinforced Polymer

AbstractNatural fibre-reinforced composites have attracted a great deal of attention by the automotive industry mainly due to their sustainable characteristics and low cost. The use of sustainable composites is expected to continuously increase in this area as the cost and weight of vehicles could be partially reduced by replacing glass fibre composites and aluminium with natural fibre composites. Adhesive bonding is the preferred joining method for composites and is increasingly used in the automotive industry. However, the literature on natural fibre reinforced polymer composite adhesive joints is scarce and needs further investigation. The main objective of this study was to investigate experimentally adhesively bonded joints made of natural, synthetic and interlaminar hybrid fibre-reinforced polymer composites. The effect of the number of the interlaminar synthetic layers required in order to match the bonded joint efficiency of a fully synthetic GFRP bonded joint was studied. It was found that the failure load of the hybrid jute/glass adherend joints increased by increasing the number of external synthetic layers (i.e. the failure load of hybrid 3-layer joint increased by 28.6% compared to hybrid 2-layer joint) and reached the pure synthetic adherends joints efficiency due to the optimum compromise between the adherend material property (i.e. stiffness and strength) and a diminished bondline peel stress state.

Economic, Exergy, and Environmental Analyses of the Energy Assessments for US Industries

2021 ◽  
pp. 1-15
Author(s):  
Alaa Hasan ◽  
Osama M. Selim ◽  
Mohamed Abousabae ◽  
Ryoichi S. Amano ◽  
Wilkistar Otieno
Keyword(s):  
Cash Flow ◽  
Emission Reduction ◽  
Co2 Emission ◽  
Exergy Analysis ◽  
Co2 Reduction ◽  
Cost Savings ◽  
Industrial Applications ◽  
Co2 Emission Reduction ◽  
Energy Assessment ◽  
Implementation Rate

Abstract This paper highlights the expected versus actual outcomes of 152 energy analyses that were performed between 2011 and 2020. The 1,317 energy assessment recommendations (ARs) are grouped into eight categories. This study adopted four measures per category: annual electricity savings, annual gas savings, annual cost savings, and annual CO2 emission reduction. The first part of the analysis compares the expected recommendations to each measure's actually implemented values for the eight categories. It was found that the percentages of the actual to the expected electricity, gas, and cost savings are 26.6%, 11.4%, and 17.1%, respectively. In contrast, the percentage of the actual to the expected CO2 reduction is 22%. Moreover, the second part of the analysis presents each category's implementation rate and the reasons for rejecting the unimplemented ARs. Cash flow and expensive initial investment resulted in rejecting 25% of ARs. Finally, the study proposes techniques and strategies to increase ARs' implementation rate and improve all private energy services industries' implementation rate. An exergy analysis is added to show the improvement that energy assessment achieves regarding exergy and exergy efficiencies of different industrial applications.

A 12-pulse rectifier with passive harmonic reduction based on UIPT in more electric aircrafts

Circuit World ◽  
2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Rohollah Abdollahi
Keyword(s):  
Power Factor ◽  
Harmonic Distortion ◽  
Cost Savings ◽  
Cost Effective ◽  
Industrial Applications ◽  
Input Current ◽  
New Combination ◽  
Content Type ◽  
Harmonic Reduction ◽  
Simulation Results

Purpose The purpose of this paper is to provide a T autotransformer based 12-pulse rectifier with passive harmonic reduction in more electric aircraft applications. The T autotransformer uses only two main windings which result in volume, space, size, weight and cost savings. Also, the proposed unconventional inter-phase transformer (UIPT) with a lower kVA rating (about 2.6% of the load power) compared to the conventional inter-phase transformer results in a more harmonic reduction. Design/methodology/approach To increase rating and reduce the cost and complexity of a multi-pulse rectifier, it is well known that the pulse number must be increased. In some practical cases, a 12-pulse rectifier (12PR) is suggested as a good solution considering its simple structure and low weight. But the 12PR cannot technically meet the standards of harmonic distortion requirements for some industrial applications, and therefore, they must be used with output filters. In this paper, a 12PR is suggested, which consists of a T autotransformer 12PR and a passive harmonic reduction (PHR) based on the UIPT at direct current (DC) link. Findings To show the advantage of this new combination over other solutions, simulation results are used, and then, a prototype is implemented to evaluate and verify the simulation results. The simulation and experimental test results show that the input current total harmonic distortion (THD) of the suggested 12PR with a PHR based on UIPT is less than 5%, which meets the IEEE 519 requirements. Also, it is shown that in comparison with other solutions, it is cost effective, and at the same time, its power factor is near unity, and its rating is 29.92% of the load rating. Therefore, it is obvious that the proposed rectifier is a practical solution for more electric aircrafts. Originality/value The contributions of this paper are summarized as follows. The suggested design uses a retrofit T autotransformer, which meets all technical constraints, and in comparison, with other options, has less rating, weight, volume and cost. In the suggested rectifier, a PHR based on UIPT at its dc link of 12PR is used, which has good technical capabilities and lower ratings. In the PHR based on UIPT, an IPT is used, which has an additional secondary winding and four diodes. This solution leads to a reduction in input current THD and conduction losses of diodes. In full load conditions, the input line current THD and power factor are 4% and 0.99, respectively. The THD is less than 5%, which satisfies IEEE-519 and DO-160G requirements.

RFID

2012 ◽  
Vol 3 (2) ◽  
pp. 14-24 ◽  
Author(s):  
Antti Permala ◽  
Karri Rantasila ◽  
Eetu Pilli-Sihvola
Keyword(s):  
Manufacturing Industry ◽  
Cost Savings ◽  
Basic Element ◽  
Automated Identification ◽  
Efficient Management ◽  
Industrial Sectors ◽  
Wide Range ◽  
Closed Systems ◽  
Identification Techniques

In many industrial sectors, the use of RFID in closed systems is evolving. To be implemented in global supply chains, all aspects related to RFID need to be standardised. By collecting, processing and distributing information efficiently, organisations should be able to improve the efficiency of their transport logistics processes, lower their operational costs, and improve their portfolio of logistics services. This case study describes the current perspectives, challenges and benefits of RFID applications in manufacturing industry. Automated, remote and wireless identification is a basic element in implementing efficient management systems in the supply chain. The most important identification techniques are barcode and RFID. Barcode is currently the most widely used method for the identification of parcels, but RFID is more suitable for automated identification for many different reasons including better readability and enhanced environmental durability. By reducing manual work and errors, RFID generates cost savings, increased productivity and efficiency of processes. There is a wide range of different RFID technologies that have varying reading ranges, protocols and data contents. There are two different approaches to using RFID tags and numbering the items to be identified. Recent standardisation developments have started to resolve the interoperability problems in the field of RFID identification.

scholarly journals Review of Tailoring Methods for Joints with Additively Manufactured Adherends and Adhesives

Materials ◽  
2020 ◽  
Vol 13 (18) ◽  
pp. 3949
Author(s):  
Mattia Frascio ◽  
Eduardo André de Sousa Marques ◽  
Ricardo João Camilo Carbas ◽  
Lucas Filipe Martins da Silva ◽  
Margherita Monti ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Review Paper ◽  
State Of The Art ◽  
Manufacturing Processes ◽  
Bonded Joints ◽  
Design For Additive Manufacturing ◽  
Polymeric Additive ◽  
Current State ◽  
Bonded Joint ◽  
Current Modelling

This review aims to assess the current modelling and experimental achievements in the design for additive manufacturing of bonded joints, providing a summary of the current state of the art. To limit its scope, the document is focused only on polymeric additive manufacturing processes. As a result, this review paper contains a structured collection of the tailoring methods adopted for additively manufactured adherends and adhesives with the aim of maximizing bonded joint performance. The intent is, setting the state of the art, to produce an overview useful to identify the new opportunities provided by recent progresses in the design for additive manufacturing, additive manufacturing processes and materials’ developments.

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