scholarly journals Introducing Fractal Dimension for Interlaminar Shear and Tensile Strength Assessment of Mechanically Interlocked Polymer-Metal-Interfaces

2020 ◽  
Author(s):  
Erik Saborowski ◽  
Philipp Steinert ◽  
Axel Dittes ◽  
Thomas Lindner ◽  
Andreas Schubert ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Fractal Dimension ◽  
Surface Structure ◽  
Thermal Spraying ◽  
Polyamide 6 ◽  
Cross Sectional ◽  
Strength Assessment ◽  
Polymer Metal ◽  
Metal Interfaces ◽  
Interlaminar Shear

The interlaminar strength of mechanically interlocked polymer-metal-interfaces is strongly dependent on the surface structure of the metal component. Therefore, this contribution assesses the suitability of the fractal dimension for quantification of the surface structure as well as interlaminar strength prediction of aluminum/polyamide 6 polymer-metal-hybrids. Seven different surface structures, manufactured by blasting, combined blasting and etching, thermal spraying and laser ablation, are investigated. The experiments are carried out on a novel butt-bonded hollow cylinder testing method that allows shear and tensile strength determination with one specific specimen geometry. The fractal dimension of the metal surfaces is derived from cross-sectional images. For comparison, the surface roughness slope is determined and related to the interlaminar strength. Finally, a fracture analysis is conducted. For the investigated material combination, the experimental results indicate that the fractal dimension is an appropriate measure for predicting the interlaminar strength

scholarly journals Introducing Fractal Dimension for Interlaminar Shear and Tensile Strength Assessment of Mechanically Interlocked Polymer–Metal Interfaces

Materials ◽  
2020 ◽  
Vol 13 (9) ◽  
pp. 2171
Author(s):  
Erik Saborowski ◽  
Philipp Steinert ◽  
Axel Dittes ◽  
Thomas Lindner ◽  
Andreas Schubert ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Fractal Dimension ◽  
Surface Structure ◽  
Thermal Spraying ◽  
Polyamide 6 ◽  
Cross Sectional ◽  
Strength Assessment ◽  
Polymer Metal ◽  
Metal Interfaces ◽  
Interlaminar Shear

The interlaminar strength of mechanically interlocked polymer–metal interfaces is strongly dependent on the surface structure of the metal component. Therefore, this contribution assesses the suitability of the fractal dimension for quantification of the surface structure, as well as interlaminar strength prediction of aluminum/polyamide 6 polymer–metal hybrids. Seven different surface structures, manufactured by mechanical blasting, combined mechanical blasting and etching, thermal spraying, and laser ablation, are investigated. The experiments are carried out on a butt-bonded hollow cylinder testing method that allows shear and tensile strength determination with one specific specimen geometry. The fractal dimension of the metal surfaces is derived from cross-sectional images. For comparison, the surface roughness slope is determined and related to the interlaminar strength. Finally, a fracture analysis is conducted. For the investigated material combination, the experimental results indicate that the fractal dimension is an appropriate measure for predicting the interlaminar strength.

scholarly journals Effect of Metal Surface Topography on the Interlaminar Shear and Tensile Strength of Aluminum/Polyamide 6 Polymer-Metal-Hybrids

Materials ◽  
2019 ◽  
Vol 12 (18) ◽  
pp. 2963
Author(s):  
Erik Saborowski ◽  
Axel Dittes ◽  
Philipp Steinert ◽  
Thomas Lindner ◽  
Ingolf Scharf ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Tensile Strength ◽  
Mechanical Performance ◽  
Thermal Spraying ◽  
Polyamide 6 ◽  
Mechanical Interlocking ◽  
Laser Structuring ◽  
Polymer Metal ◽  
Interlaminar Shear ◽  
Metal Hybrids

Mechanical interlocking has been proven to be an effective bonding mechanism for dissimilar material groups like polymers and metals. Therefore, this contribution assesses several surface pretreatments for the metallic adherent. Blasting, etching, combined blasting and etching, thermal spraying, and laser structuring processes are investigated with regard to the achievable interlaminar strength and the corresponding surface roughness parameters. The experiments are carried out on EN AW-6082/polyamide 6 polymer-metal-hybrids, utilizing a novel butt-bonded hollow cylinder specimen geometry for determining the shear and tensile strength. The experimental results indicate that the surface roughness slope has a major impact on the interlaminar strength. A laser-generated pin structure is found to provide the best mechanical performance as well as the highest surface slope of all investigated structuring methods.

Automated Condition Monitoring with Remaining Lifetime Assessment for Wire Ropes in Ladle Cranes

2021 ◽  
Vol 79 (11) ◽  
pp. 1050-1060
Author(s):  
Vasily Sukhorukov ◽  
Dmitry Slesarev ◽  
Ivan Shpakov ◽  
Vasily Yu. Volokhovsky ◽  
Alexander Vorontsov ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Condition Monitoring ◽  
Flaw Detector ◽  
Strength Analysis ◽  
Cross Sectional ◽  
Basic Oxygen ◽  
Strength Assessment ◽  
Wire Ropes ◽  
Monitoring Process ◽  
Condition Monitoring System

The hazards and deterioration of operating wire ropes on overhead cranes, which articulate the ladle in the basic oxygen steelmaking process and are subjected to intensive periodic loads and exposure to high temperatures, are discussed. An automated condition monitoring system (ACMS) based on a magnetic flux leakage testing (MFL) flaw detector permanently installed on the rope under test is used. An algorithm of the rope’s residual tensile strength assessment is provided. A specially developed software that submits a decision on the rope’s condition to the crane operator is described. The practice of combining magnetic rope testing (MRT) and tensile strength analysis for the quantitative assessment of rope condition is reviewed. Practical issues are also discussed, such as how to establish the condition monitoring process, set loss thresholds for rope metallic cross-sectional area, and safely prolong the service life of rope.

Model Compound Approach for Polymer-Metal InterFaces: ESCA Studies

1984 ◽  
Vol 40 ◽  
Author(s):  
P. N. Sanda ◽  
J. W. Bartha ◽  
B. D. Silverman ◽  
P. S. Ho ◽  
A. R. Rossi
Keyword(s):  
Model Compound ◽  
Amino Groups ◽  
Ether Linkage ◽  
Cu Films ◽  
Polymer Metal ◽  
Terminal Amino ◽  
Metal Interfaces ◽  
Imide Group

AbstractESCA studies of two molecules which are similar in structure to the PMDA and ODA constituents of the PMDA-ODA polyimide monomer are discussed. Their interaction with in-situ evaporated Cr and Cu films are compared. The PMDA model compound interacts with Cr through the imide group, while very little interaction is observed with Cu. The ODA model compound (oxydianiline) interacts with Cr via the ether linkage and the terminal amino groups, whereas very little interaction is observed with Cu.

Tensile Properties of Low Nickel Austenitic Stainless Steel at Elevated Temperatures

2012 ◽  
Vol 159 ◽  
pp. 346-350
Author(s):  
Shu Min Liu ◽  
Jian Bin Zhang
Keyword(s):  
Tensile Strength ◽  
Stainless Steel ◽  
Elevated Temperatures ◽  
Peak Stress ◽  
Temperature Curve ◽  
Delta Ferrite ◽  
Cross Sectional ◽  
Different Temperatures ◽  
Increasing Temperature ◽  
Reduction Percentage

The elevated temperature short-time tensile test with the sample of casting low nickel stainless steel was conducted on SHIMADZU AG-10 at ten temperatures 300, 500, 600, 700, 800, 950, 1000, 1050, 1100, and 1250°C, respectively. The stress-strain curves with the thermal deformation at the different temperatures, the peak stress intensity-temperature curve, and the reduction percentage of cross sectional area-temperature curve were obtained. Metallographic test samples were prepared and the morphology of deforming zone was observed by optical microscopy. The experimental results show that the tensile strength of the test samples decreases with increasing temperature. From 300 to 800°C, the work harding occurred and the tensile strength increases with increasing strain. The work softening occurred and the tensile strength decreases with increasing strain at temperatures of 800 to 1250°C. The minimum value of reduction percentage was measured at 800 °C. The austenite and delta-ferrite are the main phase in the tested samples. When the tensile temperatures are increased to 1200°C, the delta-ferrite became thinner and broke down to be spheroidized.

Charactervation of Adhesion in Thin-Film Materials by the Blister Test

1992 ◽  
Vol 276 ◽  
Author(s):  
Y Z. Chu ◽  
H. S. Jeong ◽  
R. C. White ◽  
C. J. Durning
Keyword(s):  
Fluid Pressure ◽  
Structural Features ◽  
Adhesion Energy ◽  
Pressure Data ◽  
Blister Test ◽  
Constant Rate ◽  
Polymer Metal ◽  
Metal Interfaces ◽  
Peel Tests ◽  
Microscopic Dynamic

ABSTRACTIn this work a blister test is applied to study the adhesion of thin films to substrates. In the blister test one injects a fluid at constant rate at the interface between the substrate and an overlayer to create a “blister”. The fluid pressure is measured as function of time. An analysis gives a reliable way of calculating the adhesion energy Ga. from the time-dependent pressure data. The method was applied to a variety of systems including polymer/polymer, polymer/silicon and polymer/metal interfaces. The results show that the test is very sensitive and is able to determine small adhesion energies inaccessible in conventional peel tests. This work demonstrates that the blister test provides a means of relating the mechanical strength of an interface to its microscopic dynamic and structural features.

Studies on polymer-metal interfaces

Polymer ◽  
1999 ◽  
Vol 40 (14) ◽  
pp. 3989-3994 ◽  
Author(s):  
Dong Ha Kim ◽  
Won Ho Jo
Keyword(s):  
Polymer Metal ◽  
Metal Interfaces

Interfacial Versus Cohesive Failure on Polymer-Metal Interfaces in Electronic Packaging—Effects of Interface Roughness

2002 ◽  
Vol 124 (2) ◽  
pp. 127-134 ◽  
Author(s):  
Qizhou Yao ◽  
Jianmin Qu
Keyword(s):  
Surface Roughness ◽  
Fracture Mechanics ◽  
Electronic Packaging ◽  
Interfacial Adhesion ◽  
Interfacial Strength ◽  
Interface Roughness ◽  
Cohesive Failure ◽  
Mechanics Model ◽  
Polymer Metal ◽  
Metal Interfaces

Debonding of polymer-metal interfaces often involves both interfacial and cohesive failure. Since the cohesive strength of polymers is usually much greater than the polymer-metal interfacial strength, cohesive failure near the interface is usually desired for enhancing the interfacial adhesion. Roughened surfaces generally produce more cohesive failure; therefore, they are used commonly in practice to obtain better adhesion. This paper develops a fracture mechanics model that can be used to quantitatively predict the amount of cohesive failure once the surface roughness data are given. An epoxy/Al interface was investigated using this fracture mechanics model. The predicted amount of cohesive failure as a function of surface roughness compares very well with the experimentally measured values. It is believed that this model can be extended to other polymer–metal interfaces. Contributed by the Electronic and Photonic Packaging Division for publication in the JOURNAL OF ELECTRONIC PACKAGING. Manuscript received by the EPPD.

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