Influence of Pre-Generated Infinite Adhesive Defects on the Forming Behaviour of Adhesive Bonded Steel Sheets

2014 ◽  
Vol 939 ◽  
pp. 328-335 ◽  
Author(s):  
V. Satheeshkumar ◽  
R. Ganesh Narayanan
Keyword(s):  
Plane Strain ◽  
Deep Drawing ◽  
Adhesive Layer ◽  
Tensile Tests ◽  
Epoxy Adhesive ◽  
Test Results ◽  
Steel Sheets ◽  
Sheet Materials ◽  
Materials Used ◽  
Forming Behaviour

In the present investigation, the forming behaviour of adhesive bonded sheets with the pre-generated infinite defects in the adhesive layer is studied. The infinite defects are generated with different orientations like longitudinal, transverse and at an angle of 45°. The base sheet materials used are deep drawing quality steel and SS 316L sheets, and two part epoxy adhesive is used for bonding the base sheet materials. The formability is quantified by monitoring the load-extension behaviour, and limit strain, evaluated through tensile tests and in-plane plane strain (IPPS) formability tests. It is observed that there is a significant decrease in formability because of the presence of infinite defects in the adhesive layer. While comparing the formability of adhesive bonded blanks with respect to different orientations, transversely oriented defect shows more reduction than 45° and longitudinal cases. There is not much difference between the transversely oriented and 45° oriented infinite defects in tensile tests, whereas in the IPPS formability test results, there is no considerable difference between 45° and longitudinally oriented defect.

Investigation on V-Bending and Springback of Laminated Steel Sheets

2015 ◽  
Vol 137 (4) ◽  
Author(s):  
Qiongyao Peng ◽  
Xiongqi Peng ◽  
Yinjun Wang ◽  
Tao Wang
Keyword(s):  
Adhesive Layer ◽  
Material Model ◽  
Tensile Tests ◽  
Polymer Layer ◽  
Structural Function ◽  
Steel Sheets ◽  
Lap Shear ◽  
Industry Practice ◽  
Hyperelastic Model ◽  
Processing Optimization

Laminated steel sheet (LSS) is a novel functional material consisting of two steel sheets sandwiched by an adhesive layer. It has good vibration damping and noise absorption attributed by the middle polymer layer, and structural function owed to the two face steel sheets. Springback is an omnipresent negative phenomenon in metal sheet bending. Experiments and simulations were conducted to analyze the effects of processing and material parameters on springback of a specified LSS for the purpose of process optimization. Various tests including lap-shear, normal tensile, and viscosity analysis were carried out to obtain the mechanical behavior of the polymer layer. A neo-Hookean hyperelastic model was accordingly developed. Tensile tests of the two skin sheets were also implemented for material model. Ninety degree V-bending experiments were fulfilled as a validation on the feasibility and efficiency of finite element method and material models. A following parametric study on 88 deg V-bending of the LSS was then implemented to provide a processing optimization for industry practice.

scholarly journals Investigation on Granular Medium Forming Formability of TA1 Titanium Alloy Cylinder-Shaped Parts

2021 ◽  
Author(s):  
Biao Hu ◽  
Gaoshen Cai ◽  
Jubo Fu ◽  
Yanxi Xin ◽  
Kangning Liu ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
Deep Drawing ◽  
Granular Medium ◽  
Simulation Analysis ◽  
Tensile Tests ◽  
Alloy Sheet ◽  
True Stress ◽  
Uniaxial Tensile ◽  
Test Results ◽  
Forming Quality

Abstract In order to investigate the formability of the granular medium forming (GMF), based on the Mohr-Coulomb constitutive model with the tri-axial compression test of granular medium and the true stress-strain curves of TA1 titanium alloy from uniaxial tensile tests, the numerical simulation of TA1 titanium alloy sheet deep drawing with finite element method was performed, and the deep drawing tests were also carried out. Simulation analysis and test results show that the GMF process is suitable for titanium alloy sheets, and can effectively improve the uniformity of the wall thickness of the formed parts, reduce the tendency of wrinkles and improve the forming quality.

scholarly journals The Effect of Sandblasting on Properties and Structures of the DC03/1.0347, DC04/1.0338, DC05/1.0312, and DD14/1.0389 Steels for Deep Drawing

Materials ◽  
2021 ◽  
Vol 14 (13) ◽  
pp. 3540
Author(s):  
Janusz Krawczyk ◽  
Michał Bembenek ◽  
Łukasz Frocisz ◽  
Tomasz Śleboda ◽  
Marek Paćko
Keyword(s):  
Deep Drawing ◽  
Wear Behavior ◽  
Tensile Tests ◽  
Phase Changes ◽  
Industrial Sectors ◽  
Hardness Tests ◽  
Static Tensile ◽  
Materials Used ◽  
Heat Released ◽  
Impact Erosion

The erosion phenomenon has a significant influence on many metallic materials used in numerous industrial sectors. In this paper, we present the results of an analysis of the influence of abrasive impact erosion on surface and properties of DC03/1.0347, DC04/1.0338, DC05/1.0312, and DD14/1.0389 deep drawing steels. The chemical composition, static tensile tests, hardness tests, drawability tests, erosion tests, microstructure analysis, surface roughness, and hardness of the plates were investigated. The wear mechanisms and wear behavior of the investigated steels were also discussed. The results obtained in this study allowed the assessment of the microstructural changes in deep drawing steels under the influence of intense erosive impact. The obtained results indicate that the erosive impact may cause a significant grain refinement of the microstructure of the surfaces of the investigated materials. Moreover, large amounts of heat released during erosive impact may cause the material phase changes. This research expands the knowledge on specific mechanisms taking place during sandblasting and their influence on the properties of deep drawing steels and their wear behavior.

Press Joining Rolling Process for Hybrid Systems

2010 ◽  
Vol 425 ◽  
pp. 271-281 ◽  
Author(s):  
Adele Carradò ◽  
Olga Sokolova ◽  
Gerhard Ziegmann ◽  
Heinz Palkowski
Keyword(s):  
Deep Drawing ◽  
Rolling Process ◽  
Roll Bonding ◽  
Steel Sheets ◽  
The Press ◽  
Polymer Metal ◽  
Sandwich Sheet ◽  
The One ◽  
Forming Behaviour ◽  
Metal Polymer

The press joining rolling process used for the production of metal/polymer/metal systems is introduced. In the first step three-layer sandwich sheet, 316L/polypropylene- polyethylene/316L (316L/PP-PE/316L) with and without local reinforcement, were processed by roll bonding at approx. 250°C of two steel sheets with a pre-rolled PP-PE - core sheet. Mechanical and forming behaviour of the parts had been investigated by tensile, bending and deep drawing tests. It could be shown that for moderate drawing depths deep drawing behaviour is close to the one of the mono-material.

scholarly journals Tests of Technological Conditions of the Resistance Welding and Adhesive Bonding of Coated Steel Sheets

2021 ◽  
pp. 17-30
Author(s):  
Szymon Kowieski ◽  
Jolanta Matusiak
Keyword(s):  
Isopropyl Alcohol ◽  
Adhesive Bonding ◽  
Protective Coatings ◽  
Adhesive Layer ◽  
Organic Coating ◽  
Epoxy Adhesive ◽  
Bonded Joints ◽  
Technological Parameters ◽  
Steel Sheets ◽  
Adhesive Bonded Joints

The article presents the effect of welding technological parameters and adhesive bonding conditions (surface processing, overlap dimensions and the thickness of the adhesive layer) on the formation of hybrid (welded-adhesive bonded) joints of steel sheets provided with protective coatings. The tests involved the joining of sheets made of steel HC340LA. The sheets made of steel HC340LA (provided with a ZE50/50 Granocoat ZE two-layer organic coating) were in the as-received state and after cleaning with isopropyl alcohol. The tests also involved sheets made of steel 22MnB5 provided with an AlSi coating. The sheets made of steel 22MnB5 were subjected to heat treatment, cleaning with isopropyl alcohol, roughening and etching in similar configurations. The adhesive bonding process was performed applying one-component epoxy adhesive (used in the automotive industry).

scholarly journals The Performance of CR180IF and DP600 Laser Welded Steel Sheets under Different Strain Rates

Materials ◽  
2021 ◽  
Vol 14 (6) ◽  
pp. 1553
Author(s):  
Mária Mihaliková ◽  
Kristína Zgodavová ◽  
Peter Bober ◽  
Anna Špegárová
Keyword(s):  
Sheet Steel ◽  
Testing Machine ◽  
Dynamic Test ◽  
Tensile Tests ◽  
Joint Surface ◽  
Strain Rates ◽  
Interstitial Free ◽  
Welded Steel ◽  
Steel Sheets ◽  
Static Tensile

The presented research background is a car body manufacturer’s request to test the car body’s components welded from dissimilar steel sheets. In view of the vehicle crew’s protection, it is necessary to study the static and dynamic behavior of welded steels. Therefore, the influence of laser welding on the mechanical and dynamical properties, microstructure, microhardness, and welded joint surface roughness of interstitial free CR180IF and dual-phase DP600 steels were investigated. Static tensile tests were carried out by using testing machine Zwick 1387, and dynamic test used rotary hammer machine RSO. Sheet steel was tested at different strain rates ranging from 10−3 to 103 s−1. The laser welds’ microstructure and microhardness were evaluated in the base metal, heat-affected zone, and fusion zone. The comprehensive analysis also included chemical analysis, fracture surface analysis, and roughness measurement. The research results showed that the strain rate had an influence on the mechanical properties of base materials and welded joints. The dynamic loading increases the yield stress more than the ultimate tensile strength for the monitored steels, while the most significant increase was recorded for the welded material.

Hysteresis loss of ultra-large off-the-road tire rubber compounds based on operating conditions at mine sites

2021 ◽  
pp. 095440702110155
Author(s):  
Shaosen Ma ◽  
Guangping Huang ◽  
Khaled Obaia ◽  
Soon Won Moon ◽  
Wei Victor Liu
Keyword(s):  
Large Strain ◽  
Tensile Tests ◽  
Operating Conditions ◽  
Hysteresis Loss ◽  
Strain Rates ◽  
Test Results ◽  
Tire Rubber ◽  
The Road ◽  
Rubber Compounds ◽  
Mine Sites

The objective of this study is to investigate the hysteresis loss of ultra-large off-the-road (OTR) tire rubber compounds based on typical operating conditions at mine sites. Cyclic tensile tests were conducted on tread and sidewall compounds at six strain levels ranging from 10% to 100%, eight strain rates from 10% to 500% s−1 and 14 rubber temperatures from −30°C to 100°C. The test results showed that a large strain level (e.g. 100%) increased the hysteresis loss of tire rubber compounds considerably. Hysteresis loss of tire rubber compounds increased with a rise of strain rates, and the increasing rates became greater at large strain levels (e.g. 100%). Moreover, a rise of rubber temperatures caused a decrease in hysteresis loss; however, the decrease became less significant when the rubber temperatures were above 10°C. Compared with tread compounds, sidewall compounds showed greater hysteresis loss values and more rapid increases in hysteresis loss with the rising strain rate.

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