Electromagnetic-pulse-induced acoustic testing for nondestructive testing of plastic composite/metal adhesive bonding

2020 ◽  
Vol 45 (55) ◽  
pp. 31303-31314 ◽  
Author(s):  
Hongjun Sun ◽  
Hiroyuki Kosukegawa ◽  
Mitsuo Hashimoto ◽  
Tetsuya Uchimoto ◽  
Toshiyuki Takagi
Keyword(s):  
Nondestructive Testing ◽  
Electromagnetic Pulse ◽  
Adhesive Bonding ◽  
Plastic Composite ◽  
Acoustic Testing

scholarly journals Electromagnetic pulse-induced acoustic testing and the pulsed guided wave propagation in composite/metal adhesive bonding specimens

2021 ◽  
Vol 201 ◽  
pp. 108499
Author(s):  
Hongjun Sun ◽  
Hiroyuki Kosukegawa ◽  
Toshiyuki Takagi ◽  
Tetsuya Uchimoto ◽  
Mitsuo Hashimoto ◽  
...  
Keyword(s):  
Wave Propagation ◽  
Electromagnetic Pulse ◽  
Adhesive Bonding ◽  
Guided Wave ◽  
Guided Wave Propagation ◽  
Acoustic Testing

Application of Computed Tomography in Wood-Polymer Composites Density Detection

2012 ◽  
Vol 428 ◽  
pp. 57-60
Author(s):  
Yu Han ◽  
Da Wei Qi ◽  
Shu Yue Guan
Keyword(s):  
Computed Tomography ◽  
Nondestructive Testing ◽  
Testing Procedure ◽  
Wood Plastic Composite ◽  
Ct Number ◽  
Number Range ◽  
Plastic Composite ◽  
Wood Polymer ◽  
Ct Technology ◽  
Wood Polymer Composites

CT technology was used in nondestructive testing procedure of Wood-plastic composite in the paper as well as computes the CT number range of different Wood-plastic composite tomography slices in statistic method. A fitting mathematical model between CT number and Wood-plastic composite density was Calculated, because of the linear relationship exists between Wood-plastic composite density and CT number. Hence, a new method in the nondestructive testing of Wood-plastic composite density was provided.

Study on Surface Treatments of Modified Wood Plastic Composite (WPC) to Improve Adhesion

2016 ◽  
Vol 861 ◽  
pp. 96-103 ◽  
Author(s):  
Barbora Nečasová ◽  
Pavel Liška ◽  
Jakub Kelar
Keyword(s):  
Adhesive Bonding ◽  
Maximum Shear Stress ◽  
Adhesive Bond ◽  
Adhesive System ◽  
Treatment Method ◽  
Surface Barrier ◽  
Physical Treatment ◽  
Adhesion Properties ◽  
Plastic Composite ◽  
Surface Barrier Discharge

The presented case study is focused on the complications that affect the adhesion properties of wood plastic composites. In an effort to improve the physical properties of the WPC and the adhesive bonding between the selected material and adhesive systems intended for façade bonding, several surface pretreatments were performed. The surface modification consisted of mechanical roughening or physical treatment with diffuse coplanar surface barrier discharge. The shear strength of the adhesive bond was tested following ČSN EN 1465 and the maximum shear stress was calculated for each treatment method. Although, the increase in bond strength due to these treatments was measured only for one tested adhesive system where the strength was increased by 100% with respect to the control, the diffuse plasma treatment improved the adhesive bondability and a change in failure mode was observed in all tested cases.

scholarly journals Evaluation of Bonding Quality with Advanced Nondestructive Testing (NDT) and Data Fusion

Sensors ◽  
2020 ◽  
Vol 20 (18) ◽  
pp. 5127
Author(s):  
Bengisu Yilmaz ◽  
Abdoulaye Ba ◽  
Elena Jasiuniene ◽  
Huu-Kien Bui ◽  
Gérard Berthiau
Keyword(s):  
Nondestructive Testing ◽  
Data Fusion ◽  
Adhesive Bonding ◽  
Weighted Average ◽  
Principal Component ◽  
Lap Joints ◽  
Operating Characteristics ◽  
Bonding Quality ◽  
Single Lap Joints ◽  
Bonded Composite

This work aims to compare quantitatively different nondestructive testing (NDT) techniques and data fusion features for the evaluation of adhesive bonding quality. Adhesively bonded composite-epoxy single-lap joints have been investigated with advanced ultrasonic nondestructive testing and induction thermography. Bonded structures with artificial debonding defects in three different case studies have been investigated: debonding with release film inclusion, debonding with brass film-large, debonding with brass film-small. After completing preprocessing of the data for data fusion, the feature matrices, depending on the interface reflection peak-to-peak amplitude and the principal component analysis, have been extracted from ultrasonic and thermography inspection results, respectively. The obtained feature matrices have been used as the source in basic (average, difference, weighted average, Hadamard product) and statistical (Dempster–Shafer rule of combination) data fusion algorithms. The defect detection performances of advanced nondestructive testing techniques, in addition to data fusion algorithms have been evaluated quantitatively by receiver operating characteristics. In conclusion, it is shown that data fusion can increase the detectability of artificial debonding in single-lap joints.

scholarly journals The improvement of adhesion in the system polyethylene-wood

2015 ◽  
Vol 5 (4) ◽  
pp. 169-177
Author(s):  
Стородубцева ◽  
Tamara Storodubtseva ◽  
Аскомитный ◽  
Aleksey Askomitnyy
Keyword(s):  
Polyethylene Terephthalate ◽  
Adhesion Strength ◽  
Bonding Strength ◽  
Adhesive Bonding ◽  
Raw Materials ◽  
Testing Machine ◽  
Synthetic Polymers ◽  
Tensile Testing Machine ◽  
Plastic Composite ◽  
Polymer Component

Wood-plastic composite material is primarily a mixture of various natural (cellulose, lignin, etc.) and synthetic polymers (polyethylene, polypropylene, polyethylene terephthalate, etc.) In close interaction of molecules of different polymers behave in relation to each other in different ways: some are attracted, others repelled. Some polymers tend to join with each other in a chemical reaction, other chemically neutral. This phenomenon is called compatibility. The problem of compatibility of chemically different materials is well illustrated by a well-known example of the interaction of oil and water. Water droplets roll on the surface oil and oiled steel needle does not want to sink. In practice cannot be completely hydrophilic or hydrophobic substances, as well as oleophobic and oleophilic. Every substance has a greater or lesser degree of hydrophilicity, hydrophobicity, uliopilaste and oleophobicity. Chemistry gives you the opportunity to resolve the problem of adhesion of wood and synthetic polymers in a lot of ways, including modifying resin or (and) particles of wood (chemical, thermo-mechanical, mechanochemical, and even plasma irrad-iation processing). Modification of the basic raw materials are rather widely, since they have a good perspective. The article presents the research results of the bonding strength of the polyethylene terephthalate – wood and method of its improvement. To determine the adhesion strength in the system binder – filler were used the special samples for testing shear. The three selected wood species: pine, birch and oak. As the polymer component used PCM. The experiment was conducted on a tensile testing machine CDM a-10 with the use of special mounting of the sample. It is established that the adhesive bonding strength of the polyethylene terephthalate-wood is very low. Processing glyoxal filler enhances the adhesion strength of wood to the polymer. Depending on the breed and the direction of fibers fixed in improving adhesion 6-23 times.

scholarly journals Toward Creating a Portable Impedance-Based Nondestructive Testing Method for Debonding Damage Detection of Composite Structures

2019 ◽  
Vol 9 (15) ◽  
pp. 3189 ◽  
Author(s):  
Wongi S. Na ◽  
Ki-Tae Park
Keyword(s):  
Nondestructive Testing ◽  
Composite Structures ◽  
Adhesive Bonding ◽  
Damage Identification ◽  
Electromechanical Impedance ◽  
Heavy Equipment ◽  
Impedance Technique ◽  
Mechanical Fastening ◽  
Debonding Detection ◽  
Testing Field

Debonding detection of composite structures is a vital task as such damage weakens the structure leading to a failure. As adhesive bonding is a more preferable choice over the conventional mechanical fastening method, detecting debonding as early as possible could minimize the overall maintenance costs. For this reason, a vast amount of research in the nondestructive testing field is being conducted as we speak. However, most of the methods may require well-trained experts or heavy equipment. In this study, the piezoelectric (PZT) material-based method known as the electromechanical impedance technique is investigated to seek the possibility of making the technique very cheap and portable by temporarily attaching the sensor. Furthermore, ANSYS simulation studies using smaller PZT patches as small as 0.1 mm × 0.1 mm are simulated to investigate the impedance signatures acquired from the simulations. The results show the possibility of using smaller PZT patches compared to the conventional PZT sizes of 10 mm × 10 mm for a successful damage identification process.

Factors influencing adhesive bonding at the bone/implant interface

1992 ◽  
Vol 50 (2) ◽  
pp. 1114-1115
Author(s):  
Julie A. Martini ◽  
Robert H. Doremus
Keyword(s):  
Electron Microscopy ◽  
Adhesive Bonding ◽  
Microscopy Study ◽  
Electron Microscopy Study ◽  
Bone Implant ◽  
Factors Influencing ◽  
Lr White ◽  
Transmission Electron ◽  
New Zealand White Rabbits ◽  
Scanning Electron

Tracy and Doremus have demonstrated chemical bonding between bone and hydroxylapatite with transmission electron microscopy. Now researchers ponder how to improve upon this bond in turn improving the life expectancy and biocompatibility of implantable orthopedic devices.This report focuses on a study of the- chemical influences on the interfacial integrity and strength. Pure hydroxylapatite (HAP), magnesium doped HAP, strontium doped HAP, bioglass and medical grade titanium cylinders were implanted into the tibial cortices of New Zealand white rabbits. After 12 weeks, the implants were retrieved for a scanning electron microscopy study coupled with energy dispersive spectroscopy.Following sacrifice and careful retrieval, the samples were dehydrated through a graduated series starting with 50% ethanol and continuing through 60, 70, 80, 90, 95, and 100% ethanol over a period of two days. The samples were embedded in LR White. Again a graduated series was used with solutions of 50, 75 and 100% LR White diluted in ethanol.

Adhesive bonding of stainless steels and their component metals

2000 ◽  
Vol 27 (12) ◽  
pp. 1054-1059 ◽  
Author(s):  
H. Matsumura ◽  
N. Tanoue ◽  
M. Atsuta
Keyword(s):  
Stainless Steels ◽  
Adhesive Bonding
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