Shear strength and temperature distribution model of friction spot lap joint of high density polyethylene with aluminum alloy 7075

2019 ◽  
Vol 10 (4) ◽  
pp. 469-483 ◽  
Author(s):  
Isam Tareq Abdullah ◽  
Sabah Khammass Hussein
Keyword(s):  
Shear Strength ◽  
Temperature Distribution ◽  
High Density Polyethylene ◽  
Contact Region ◽  
High Density ◽  
Distribution Model ◽  
Lap Joint ◽  
Content Type ◽  
Rotating Speed ◽  
Model Of Friction

Purpose The purpose of this paper is to join a sheet of the AA7075 with the high-density polyethylene (HDPE) by a lap joint using friction spot processing and investigate the temperature distribution of joint during this process using the finite element method (FEM). Design/methodology/approach A semi-conical hole was manufactured in the AA7075 specimen and a lap joint configuration was prepared with the HDPE specimen. A rotating tool was used to generate the required heat to melt the polymer by the friction with the AA7075 specimen. The applied tool force moved the molten polymer through the hole. Four parameters were used: lower diameter of hole, rotating speed, plunging depth and time. The results of shear test were analyzed using the Taguchi method. A FEM was presented to estimate the temperature distribution of joint during the process. Findings All specimens failed by shearing the polymer at the lap joint region without dislocation. The specimens of the smallest diameter exhibited the highest shear strength at the lap joint. The maximum ranges of temperature were recorded at the contact region between the rotating tool and the AA7075 specimen. The tool plunging depth recorded the highest effect on the generated heat compared with the rotating speed and plunging time. Originality/value For the first time, the AA7075 sheet was joined with the HDPE sheet by friction spot processing. The temperature distribution of this joint was simulated using the FEM.

Friction spot lap joining of the anodized aluminium alloy 6061 with high-density polyethylene sheets

2019 ◽  
Vol 16 (4) ◽  
pp. 539-549 ◽  
Author(s):  
Ghadanfer Hussein Ali ◽  
Sabah Khammass Hussein
Keyword(s):  
Aluminium Alloy ◽  
High Density Polyethylene ◽  
Joint Strength ◽  
Processing Time ◽  
High Density ◽  
Frictional Heat ◽  
Lap Joint ◽  
Content Type ◽  
Tool Diameter ◽  
Joining Process

Purpose The purpose of this paper is to join an anodized aluminium alloy AA6061 sheet with high-density polyethylene (HDPE) using friction spot process. Design/methodology/approach The surface of AA6061 sheet was anodized to increase the pores’ size. A lap joint configuration was used to join the AA6061 with HDPE sheets by the friction spot process. The joining process was carried out using a rotating tool of different diameters: 14, 16 and 18 mm. Three tool-plunging depths were used – 0.1, 0.2 and 0.3 mm – with three values of the processing time – 20, 30 and 40 s. The joining process parameters were designed according to the Taguchi approach. Two sets of samples were joined: the as-received AA6061/HDPE and the anodized AA6061/HDPE. Findings Frictional heat melted the HDPE layers near the lap joint line and penetrated it through the surface pores of the AA6061 sheet via the applied pressure of the tool. The tool diameter exhibited higher effect on the joint strength than processing time and the tool-plunging depth. Specimens of highest and lowest tensile force were failed by necking the polymer side and shearing the polymer layers at the lap joint, respectively. Molten HDPE was mechanically interlocked into the pores of the anodized surface of AA6061 with an interface line of 18-m width. Originality/value For the first time, HDPE was joined with the anodized AA6061 by the friction spot process. The joint strength reached an ideal efficiency of 100 per cent.

Shear Strength and Fracture Location of Dissimilar A6063 Aluminum Alloy and SUS430 Stainless Steel Lap Joint

2018 ◽  
Vol 773 ◽  
pp. 196-201 ◽  
Author(s):  
Paiboon Yaemphuan ◽  
Surat Triwanapong ◽  
Kittipong Kimapong
Keyword(s):  
Stainless Steel ◽  
Shear Strength ◽  
Welding Speed ◽  
Joint Interface ◽  
Tensile Shear Strength ◽  
Fracture Path ◽  
Lap Joint ◽  
Tensile Shear ◽  
Rotating Speed ◽  
Tilted Angle

In this paper, friction stir welding (FSW) was used to weld the dissimilar A6063 Aluminum/SUS430 stainless steel lap joint with various parameter setting in a welding process. The setting included a rotating speed between 125-750 rpm, a welding speed between the 25-175 mm/min and 0-5 degrees of tool tilted angle. The welded lap joints were systematically examined in regard of the tensile-shear strength, the fracture path, and microstructure. The experimental results were concluded as follows. The decrease in the welding heat input generated from the low rotating speed and the high welding resulted in decreasing of the shear strength. A degree of a tool tilted angle affected a shear strength, and a change in the strength came from the different rate in material combination at the joint interface. The increase in a tensile-shear strength occurred for specimens produced in 0-2 degrees of a tool tilted angle while 3-5 degrees affected in decreasing. The highest shear strength of 11,870 N was obtained when the lap joint was produced by the rotating speed of 500 rpm, the welding speed of 50 mm/min and the tool tilted angle at 2 degrees. The fracture path found in the specimen with the maximum shear strength was located in the Al stirred zone, not in the joint interface.

Joining of AA6061 to polyvinyl chloride via hot extrusion

2019 ◽  
Vol 11 (2) ◽  
pp. 286-302
Author(s):  
Isam Tareq Abdullah ◽  
Sabah Khammass Hussein ◽  
Abbas Khammas Hussein
Keyword(s):  
Shear Strength ◽  
Polyvinyl Chloride ◽  
Process Parameters ◽  
Base Material ◽  
Hot Extrusion ◽  
Element Model ◽  
Hole Diameter ◽  
Joint Shear Strength ◽  
Content Type ◽  
Rotating Speed

Purpose The purpose of this paper is to join aluminium alloy AA6061 with polyvinyl chloride (PVC) sheets using the friction spot technique. Design/methodology/approach The AA6061 specimen was drilled with a semi-conical hole and put over the PVC specimen with a lap configuration. A friction spot technique was used to generate the required heat to melt and extrude the PVC through the aluminium hole. In this study, three process parameters were used: time, plunging depth and rotating speed of the tool. Thermal finite element model was built to analyse the process temperature. Effect of the process parameters on the joint shear strength and temperature was analysed using the design of experiments method. The microstructure investigation of the joint cross section was examined. Findings The input heat melted and extruded the polymer into the aluminium hole with the aid of tool pressure. A mechanical interlock was observed at the interface line between the polymer and aluminium. The scattered aluminium fragments into the molten polymer increased the shear strength of the joint. The hole diameter exhibited the highest effect on the joint strength compared with the other parameters. Specimen of minimum hole diameter recorded the maximum shear strength of 224 MPa. The proposed model gave a good agreement with the experimental data. Originality/value For the first time, the PVC was joined with AA6061 by the hot extrusion using the friction spot technique. The shear strength of joint reached 7.5 times of the base material (PVC).

scholarly journals The Effect of Adding High-Density Polyethylene Polymer on the Engineering Characteristics for Sandy Soil

2021 ◽  
Vol 27 (9) ◽  
pp. 29-37
Author(s):  
Noor Al-huda Jasim ◽  
Qassun S Shafiqu ◽  
Mohammed A Ibrahim
Keyword(s):  
Shear Strength ◽  
Sandy Soil ◽  
High Density Polyethylene ◽  
Soil Stabilization ◽  
Sandy Soils ◽  
High Density ◽  
Soil Permeability ◽  
Angle Of Internal Friction ◽  
Engineering Characteristics ◽  
Curing Period

The loose sand is subject to large settlement when it is exposed to high stresses. This settlement is due to the nature of the high drainage of sand, which displays foundations and constructions to a large danger. The densification of loose sandy soils is required to provide sufficient bearing capacity for the structures. Thus soil stabilization is used to avoid failure in the facilities. Traditional methods of stabilized sandy soil such as fly ash, bituminous, and cement often require an extended curing period. The use of polymers to stabilize sandy soils is more extensive nowadays because it does not require a long curing time in addition to being chemically stable. In this study, the effect of adding different percentages of high-density polyethylene HDPE  to the sandy soils' engineering characteristics such as the angle of internal frictions Ø0, shear strength τ, California Bearing Ratio CBR, and permeability k was studied. The results of laboratory tests showed that using of HDPE at percentages  (0.1, 0.3, 0.6, 1, and 3%) led to a decrease in soil permeability by 18% and an increase in both the angle of internal friction, the CBR value, and shear strength about 27.2%, 180.9%, and 38.6 % respectively by adding 1%. HDPE.

Joining of aluminium alloy to pre-holed carbon steel by aluminium extrusion using friction spot method

2019 ◽  
Vol 11 (6) ◽  
pp. 849-860
Author(s):  
Isam Tareq Abdullah ◽  
Sabah Khammass Hussein ◽  
Abbas Khammas Hussein
Keyword(s):  
Shear Strength ◽  
Carbon Steel ◽  
Aluminium Alloy ◽  
Heating Time ◽  
X Ray Diffraction ◽  
Content Type ◽  
Rotating Speed ◽  
Pull Out ◽  
Aluminium Extrusion ◽  
First Time

Purpose The purpose of this paper is to join sheets of an aluminium alloy together with pre-holed carbon steel via friction spot technique. Design/methodology/approach An AISI 1006 steel sheet was a pre-holed with a 4.8 mm diameter and put under AA5052 sheet with a lap joint configuration. The joining process was carried out by extruding the aluminium through the steel hole using a rotating tool of 10 mm diameter. Furthermore, three process parameters (pre-heating time, rotating speed and plunging depth of the tool) with three values for each parameter were used to study their effects on the joints quality. In order to join samples, nine experiments were designed according to a Taguchi method. Shear strength, microstructure and X-ray diffraction tests of the joint were carried out. Findings The joining mechanism occurred by a mechanical interlock of the extruded aluminium with the inner surface of the steel hole. The tool plunging depth had a significant effect on the shear strength of the joint. The shear strength of two joints exceeded the shear strength of the wrought material (AA5052). All samples failed with two modes: pull-out and shearing of the extruded aluminium. Originality/value For the first time, the extrusion technique was used to join AA5052 sheet together with pre-holed carbon steel, with a perfect joint efficiency.

Tribological modification of high-density polyethylene by using carbon soot from diesel combustion

2016 ◽  
Vol 68 (5) ◽  
pp. 603-610 ◽  
Author(s):  
X.A. Cao ◽  
G.Q. Shao ◽  
K.H. Hu
Keyword(s):  
Abrasive Wear ◽  
Amorphous Carbon ◽  
Tribological Properties ◽  
High Density Polyethylene ◽  
Friction Pair ◽  
High Density ◽  
Exhaust Emission ◽  
Content Type ◽  
Transmission Electron ◽  
Carbon Soot

Purpose The purpose of this paper is to explore the tribological properties of high-density polyethylene (HDPE) modified by carbon soot from the combustion of No. 0 diesel. Design/methodology/approach Carbon soot is characterized using X-ray diffraction, transmission electron microscopy and scanning electronic microscopy. The tribological properties of HDPE samples with carbon soot are investigated on a materials surface tester with a ball-on-disk friction pair. Findings The collected carbon soot mainly comprises amorphous carbon nanoparticles of 50-100 nm in diameter. The main wear behaviours of pure HDPE include abrasive wear and plastic deformation. After adding carbon soot nanoparticles to HDPE, HDPE wear decreases. The appropriate carbon soot content is 8 per cent in HDPE under the selected testing conditions. Compared with other HDPE samples, HDPE with 8 per cent carbon soot has higher melting temperature, lower abrasive wear and better wear resistance. The lubrication of HDPE with carbon soot is due to the formation of a transferring film composed of HDPE, amorphous carbon and graphite carbon. Originality/value The paper reveals the HDPE modification and lubrication mechanisms by using carbon soot from the combustion of diesel. Related research can perhaps provide a potential approach for the treatment of carbon soot exhaust emission.

Reinforcing high-density polyethylene by polyacrylonitrile fibers

2018 ◽  
Vol 47 (1) ◽  
pp. 86-94 ◽  
Author(s):  
Lien Zhu ◽  
Di Wu ◽  
Baolong Wang ◽  
Jing Zhao ◽  
Zheng Jin ◽  
...  
Keyword(s):  
Tensile Strength ◽  
High Density Polyethylene ◽  
Flexural Modulus ◽  
High Density ◽  
Degree Of Crystallinity ◽  
Content Type ◽  
Resistance To Deformation ◽  
Different Content ◽  
The Degree Of Crystallinity ◽  
Pan Fibers

Purpose The purpose of this paper is to find a new method to reinforce high-density polyethylene (HDPE) with polyacrylonitrile fibers (PAN). Furthermore, the crystallinity, viscoelasticity and thermal properties of HDPE composites have also been investigated and compared. Design/methodology/approach For effective reinforcing, samples with different content fillers were prepared. HDPE composites were prepared by melt blending with double-screw extruder prior to cutting into particles and the samples for testing were made using an injection molding machine. Findings With the addition of 9 Wt.% PAN fibers, it was found that the tensile strength and flexural modulus got the maximum value in all HDPE composites and increased by 1.2 times than pure HDPE. The shore hardness, storage modulus and vicat softening point of the composites improved continuously with the increase in the proportion of the fibers. The thermal stability and processability of composites did not change rapidly with the addition of PAN fibers. The degree of crystallinity increased with the addition of PAN fibers. In general, the composites achieve the best comprehensive mechanical properties with the fiber content of 9 Wt.%. Practical implications The fibers improve the strength of the polyethylene and enhance its ability to resist deformation. Originality/value The modified HDPE by PAN fibers in this study have high tensile strength and resistance to deformation and can be used as an efficient material in engineering, packaging and automotive applications.

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