Numerical Investigation of Fatigue Behaviours of Non-Patched and Patched Aluminium Pipes

Adin, Hamit; Yıldız, Bilal; Adin, Mehmet Şükrü

doi:10.36222/ejt.893327

Cited by 9 publications

(6 citation statements)

References 21 publications

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“…Lap shear testing of the joints was performed using a Zwick Roell-Z020-UTM (German make) with a load cell of 20 kN. The tests were performed at room temperature (32°C, 80% relative humidity) with a traverse speed of 2 mm min −1 according to ASTM Type-V D-638 standard (Adin and Okumuş, 2022; American Society for Testing and Materials, 2016; Adin et al , 2021). An optical microscope, supplied by Conation Technologies Ltd., Pune, India, fitted with five mega-pixel camera was used for the macro-structure and fracture analysis.…”

Section: Methodsmentioning

confidence: 99%

Investigations on friction stir spot welding to overcome bed size limits of material extrusion (MEX) 3D printers

Tiwary,

Padmakumar,

Malik

2023

RPJ

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Purpose Material extrusion (MEX) 3D printers suffer from an intrinsic limitation of small size of the prints due to its restricted bed dimension. On the other hand, friction stir spot welding (FSSW) is gaining wide interest from automobile, airplane, off-road equipment manufacturers and even consumer electronics. This paper aims to explore the possibility of FSSW on Acrylonitrile Butadiene Styrene/Polylactic acid 3D-printed components to overcome the bed size limitation of MEX 3D printers. Design/methodology/approach Four different tool geometries (tapered cylindrical pin with/without concavity, pinless with/without concavity) were used to produce the joints. Three critical process parameters related to FSSW (tool rotational speed, plunge depth and dwell time) and two related to 3D printing (material combination and infill percentages) were investigated and optimized using the Taguchi L27 design of experiments. The influence of each welding parameter on the shear strength was evaluated by analysis of variance. Findings Results revealed that the infill percentage, a 3D printing parameter, had the maximum effect on the joint strength. The joints displayed pull nugget, cross nugget and substrate failure morphologies. The outcome resulted in the joint efficiency reaching up to 100.3%, better than that obtained by other competitive processes for 3D-printed thermoplastics. The results, when applied to weld a UAV wing, showed good strength and integrity. Further, grafting the joints with nylon micro-particles was also investigated, resulting in a detrimental effect on the strength. Originality/value To the best of the authors’ knowledge, this is the first study to demonstrate that the welding of dissimilar 3D-printed thermoplastics with/without microparticles is possible by FSSW, whilst the process parameters have a considerable consequence on the bond strength.

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Section: Methodsmentioning

confidence: 99%

Investigations on friction stir spot welding to overcome bed size limits of material extrusion (MEX) 3D printers

Tiwary,

Padmakumar,

Malik

2023

RPJ

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“…They found that patching with composites increased fatigue life significantly. Adin et al [11] worked on the effect of patching aluminum pipes on the fatigue stresses numerically. They saw that patch dimensions are important in fatigue stresses and higher fatigue stresses were obtained in quarter-circle patches.…”

Section: The Effect Of Damage Line and Patch Dimensions On Tensilementioning

confidence: 99%

Alümi̇nyum Levha Tami̇ri̇nde Hasar Hatti Ve Yama Ölçüleri̇ni̇n Çekme Geri̇lme Davranişina Etki̇si̇

Şişman

2022

JSTER

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In this study, in the repair of angled channel aluminum plates; The effects of channel angle and patch sizes on tensile stress behavior were investigated experimentally. For this purpose, aluminum 2024 T3 sheets with angled channels with varying channel angles were prepared. These plates were subjected to tensile loads and their failure loads were investigated experimentally. Then, using DP460 adhesive material, angled channel aluminum 2024 T3 sheets were repaired using double-sided lap joints with aluminum 2024 T3 patches of varying sizes, and the repaired samples were subjected to tensile load, the effect of channel angle and patch size change on failure loads and stress behaviors in repair was also experimentally examined and the success of the repair was evaluated.

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“…Severe plastic deformation (SPD) processes have been utilized to produce ultra-fine grain (UFG) structures in metals and alloys including eliminating environmental pollution, low costs, producing larger samples. [8][9][10][11][12][13][14][15][16] ARB is conducted on metal or alloy sheets with cumulative rolling passes usually with 50% of thickness reduction ratio. The product results of this process showed that this process is suitable for fabricating a wide range of metal matrix composites (MMCs) reinforced with metals or ceramics in hot and cold conditions.…”

Section: Introductionmentioning

confidence: 99%

An experimental investigation of fracture toughness, mechanical properties and forming limit curves of Al composites

Heydari Vini,

Daneshmand

2023

Proceedings of the Institution of Mechanical Engineers, Part C:

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In the present study, accumulative roll bonding is used to fabricate Al base composites with the thickness of 1 mm. then, fracture toughness, mechanical properties and forming limit diagrams (FLD) of them have been investigated versus ARB parameters experimentally. Boron nitride (BN) particles are used as reinforcements and Al/BN composites have been manufactured up to 10 accumulative rolling passes at 300°C. after the 10th pass, the strength of composite samples reached to 168 MPa registering 248% improvement than the initial AA1100 sample. Also, the bonding quality among the composite layers improved by increasing the number of passes. A uniform scattering of Boron nitride particles and bonding strength and quality was improved at higher number of passes. Moreover, the fracture mode at higher passes was observed as shear ductile that had been changed from deep dimples (for low number of passes). The area under the FLDs, dropped sharply after the first pass and then improved at higher passes, as the criterion of formability. Finally, fracture toughness enhanced to the maximum value of 30 MPam1/2 for the composite samples fabricated with 10 passes.

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Numerical Investigation of Fatigue Behaviours of Non-Patched and Patched Aluminium Pipes

Cited by 9 publications

References 21 publications

Investigations on friction stir spot welding to overcome bed size limits of material extrusion (MEX) 3D printers

Investigations on friction stir spot welding to overcome bed size limits of material extrusion (MEX) 3D printers

Alümi̇nyum Levha Tami̇ri̇nde Hasar Hatti Ve Yama Ölçüleri̇ni̇n Çekme Geri̇lme Davranişina Etki̇si̇

An experimental investigation of fracture toughness, mechanical properties and forming limit curves of Al composites

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