Adhesive Bonding Joints of Coating with Zn/Mg Layer on Sheets for Car-Body Panels at Temperature Loading

2015 ◽  
Vol 669 ◽  
pp. 167-175
Author(s):  
Michaela Kolnerová ◽  
Jiří Sobotka ◽  
Pavel Solfronk
Keyword(s):  
Adhesive Bonding ◽  
Production Systems ◽  
Peel Test ◽  
Strength Properties ◽  
Adhesive Joints ◽  
Series Production ◽  
Influence Of Temperature ◽  
Car Body ◽  
Coating Type ◽  
Type Of Fracture

The paper deals with the monitoring of utility properties of new coating type on the basis of Zn/Mg (ZM). For the comparison there was used commonly used coating in the series production of car-body panels on the basis of zinc (Z100). Measured results markedly contribute to improve production systems of car-body adhesion bonding on the basic of performed evaluation of applied coatings types utility properties quality with regard to influence of temperature and corrosion environment. Testing was carry out by T-peel test acc. to ISO 11339 when such type of loading represents crucial bonding fracture type. Thus results reveal information about behavior of adhesive joints strength properties together with the type of fracture as a criterion for suitable application of new coatings types on the basis of Zn/Mg and their implementation into series production of automobiles.

Causes of gear pump fails and methods for their elimination

2020 ◽  
pp. 98-107
Author(s):  
Vitaliy A. Zuyevskiy ◽  
Daniil O. Klimyuk ◽  
Ivan A. Shemberev
Keyword(s):  
Adhesion Strength ◽  
Production Systems ◽  
Low Cost ◽  
High Strength ◽  
Strength Properties ◽  
Research Purpose ◽  
Working Fluid ◽  
Gear Pump ◽  
Repair Service ◽  
Recovery Method

Gear pumps are an important element of many production systems and their replacement in case of failure can be quite expensive, so it is important to have a modern and well-tuned technology for their recovery. There are many methods for restoring the pump's performance, depending on the reason that led to its failure. (Research purpose) The research purpose is in determining what causes most often lead to loss of pump performance, and developing a recovery method that provides the greatest post-repair service life of the pump and low cost of repair. (Materials and methods) Authors took into account that the applied coatings must have sufficient adhesion strength and resistance to mechanical, thermal and corrosion loads during operation. It was found that most often significant leaks of the working fluid, leading to failure, occur due to an increase in the gap between the inner surface of the housing and the gears due to active wear of the housing wells. Authors determined that the method of electric spark treatment of worn-out housing wells is best suited to perform the task (a large post-repair resource and low costs). (Results and discussion) It was found by laboratory studies of the adhesion strength of electric spark coatings with various electrodes that the best transfer of the material to the substrate is provided by bronze electrodes BrMKts3-1. It was noted that the coatings applied using the BrMKts3-1 electrode have high strength properties. (Conclusions) Research conducted in the center for collective use "Nano-Center" VIM confirmed the possibility of effective recovery of the gear pump by electric spark treatment.

NON-DESTRUCTIVE EVALUATION OF MECHANICAL DAMAGE OF ADHESIVES USING MAGNETO-ELECTRIC NANOPARTICLES

2021 ◽  
Author(s):  
GONZALO SEISDEDOS ◽  
BRIAN HERNANDEZ ◽  
JULIETTE DUBON ◽  
MARIANA ONTIVEROS ◽  
BENJAMIN BOESL ◽  
...  
Keyword(s):  
Adhesive Joint ◽  
Adhesive Bonding ◽  
Mechanical Damage ◽  
Adhesive Bond ◽  
Tensile Tests ◽  
Adhesive Joints ◽  
Adhesive Bonds ◽  
Magnetic Signatures ◽  
Looper System ◽  
Lock In

Adhesive bonding has been shown to successfully address some of the main problems with traditional fasteners, such as the reduction of the overall weight and a more uniformly distributed stress state. However, due to the unpredictability of failure of adhesive bonds, their use is not widely accepted in the aerospace industry. Unlike traditional fastening methods, it is difficult to inspect the health of an adhesive joint once it has been cured. For adhesive bonding to be widely accepted and implemented, there must be a better understanding of the fracture mechanism of the adhesive joints, as well as a way to monitor the health of the bonds nondestructively. Therefore, in-field structural health monitoring is an important tool to ensure optimal condition of the bond is present during its lifetime. This project focuses on the advancement of a non-invasive field instrument for evaluation of the health of the adhesive joints. The tool developed is based on a B-H looper system where coils are arranged into a noise-cancellation configuration to measure the magnetic susceptibility of the samples with a lock-in amplifier. The B-H looper system can evaluate the state of damage in an adhesive bond by detecting changes in surface charge density at the molecular level of an epoxy-based adhesive doped with magneto-electric nanoparticles (MENs). Epoxy-based adhesive samples were doped with MENs and then scanned using the B-H looper system. To evaluate the health of the adhesive joint, microindentation and tensile tests were performed on MENs-doped adhesive samples to understand the relationship between mechanical damage and magnetic signal. Correlations between magnetic signatures and mechanical damage were minimally observed, thus future studies will focus on refining the procedure and damaging methodology.

Buffer Size Planning Versus Transfer Line Efficiency

1986 ◽  
Vol 108 (2) ◽  
pp. 105-112 ◽  
Author(s):  
A. Villa ◽  
B. Fassino ◽  
S. Rossetto
Keyword(s):  
Buffer Capacity ◽  
Production Systems ◽  
Design Tool ◽  
Buffer Size ◽  
Planning Problem ◽  
Series Production ◽  
Main Design ◽  
Transfer Line ◽  
Optimal Values ◽  
Buffer Capacities

The paper deals with the main design problem for series production systems, namely the choice of efficiency-optimal values of interstage buffer capacities. It is shown that the design tool must be an accurate dynamic model, able to describe both work station reliability and the couplings among stations (i.e., blocking and starving situations) due to finite storage spaces. By use of this model, the buffer size planning problem can be solved by developing a sensitivity analysis of the model operation modes with respect to buffer capacity values. According to this approach, an analysis of the transfer line efficiency reduction, due to either nonoptimal capacity values or station reliability variations, is also performed.

The influence of temperature on selected strength properties of furniture particleboard

2019 ◽  
Vol 108 ◽  
pp. 128-134
Author(s):  
PIOTR BORYSIUK ◽  
ANNA TETELEWSKA ◽  
AURIGA RADOSŁAW ◽  
IZABELLA JENCZYK-TOŁŁOCZKO
Keyword(s):  
Strength Properties ◽  
Large Decrease ◽  
Influence Of Temperature ◽  
Temperature Range ◽  
Influence Of Temperature On ◽  
Negative Effect

The influence of temperature on selected strength properties of furniture particleboard. As a part of the study, the influence of temperature on selected properties of furniture particleboard was tested. P2 type industrial particleboards in three finishing options: raw boards (1), boards covered with melamine film in white (2) and black (3) (10 samples per variant) have been subjected to temperatures from -20oC to +120oC, at 10oC intervals. The Time of exposure for individual temperatures was 7 days. MOR, MOE and IB were determined for tested boards. It has been shown that temperatures above 50oC have a negative effect on strength properties of boards. A large decrease in all tested parameters was observed in the temperature range from +60oC to +120oC. It was also noted that finishing boards with melamine film did not improve their durability.

Composite stage effects in unbalancing of series production systems

1985 ◽  
Vol 23 (1) ◽  
pp. 1-20 ◽  
Author(s):  
A. MISHRA ◽  
D. ACHARYA ◽  
N. P. RAO ◽  
G. P. SASTRY
Keyword(s):  
Production Systems ◽  
Series Production
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