A combined numerical and statistical analysis for prediction of critical buckling load of the cylindrical shell with rectangular cutout

Sam-Daliri, Omid; Farahani, Mohammad Reza; Farhang, Majid

doi:10.5267/j.esm.2018.12.001

Cited by 10 publications

(5 citation statements)

References 1 publication

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“…The process parameters of the FSW process were considered based on the experimental design. In experimental design, each factor was set between the high and the low levels [29][30][31]. The process parameters of the FSW process were considered based on the experimental design.…”

Section: Resuls and Discussionmentioning

confidence: 99%

Effect of friction stir welding parameters on the residual stress distribution of Al-2024-T6 alloy

Farhang¹,

Sam-Daliri²,

Farahani³

et al. 2021

JMES

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The objective of this study was to investigate the influences of the main parameters of friction stir welding (FSW) on the residual stresses remained in the FSW of Al 2024-T6. The main parameters were tool rotational speed and tool transverse speed. The effect of these parameters on the residual stresses was studied in both finite element simulation and hole drilling strain gauge measurement. The results showed a good agreement between the numerical results and the experimental outcomes. The change in transverse speed from 25 to 31.5 mm/min resulted in increase of longitudinal residual stresses in welding centerline in which the longitudinal residual stress was increased at the tool rotational speed of 1120 rpm and 1600 rpm about 12.5% and 2.67%, respectively. The results showed that at the low rotational speed, the strain rate had the most effect on the residual stresses whereas at the high rotational speed, some residual stress was released due to the generated heat in the weld zone.

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Section: Resuls and Discussionmentioning

confidence: 99%

Effect of friction stir welding parameters on the residual stress distribution of Al-2024-T6 alloy

Farhang¹,

Sam-Daliri²,

Farahani³

et al. 2021

JMES

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“…Then, the specimens were subjected to a shear load until fracture using a Zwick/Roell Z020 universal testing machine. A crosshead displacement rate of dr = 1 mm/min is applied [9,18,19]. The tensile force, longitudinal displacement and voltage changes versus time are measured concurrently.…”

Section: Mechanical and Electrical Acquisition Systemmentioning

confidence: 99%

“…The nature and propagation of damage in the adhesive layer with embedded defects are assumed to be the same as in adhesive joints without embedded defects [18]. The electro-mechanical behavior and fracture surface of the adhesive joints with ad = 10 % embedded defect area, including circular and square defects in the adhesive layer, are shown in figures 6a and 6b, respectively.…”

Section: Effect Of the Artificial Defects On The Sensitivitymentioning

confidence: 99%

Condition monitoring of crack extension in the reinforcement adhesive joints by carbon nanotubes

2020

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Carbon nanotubes (CNT) are ideally suited to be employed for damage sensing in fiber rein- forced composite structures. In this work, the capability of CNTs for crack extension of a single lap Al-Al adhesive joints (SLJ) under shear load is studied using electrical resistance change. Different weight per- cent of CNT are added to epoxy adhesive. Epoxy adhesive with high concentration of CNT is obtained during shear loading to have the maximum strength and provide the best sensory properties. To provide a more concise evaluation of the crack extension in the adhesive layer under shear load, artificial defects are embedded into the SLJ specimens. The effects of square and circular defects with two different sizes on the crack extension in the adhesive layer are evaluated. The results showed that the maximum relative resistance change has occurred by 220% when the microcracks are initiated and accordingly developed from the nanoadhesive and changed its direction from the Square defect boundary. Additionally, in comparison with interface fracture in defective adhesive joint, when a part of crack grows through the adhesive layer, the resistance change showed higher values.

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“…A micromechanical approach is more interesting to improve the limitations of these models [5]. Concerning the studies investigating the effects of geometrical parameters and their combinations, we can cite the study of Sam Daliri et al [6,7] who combined numerical and statistical analysis for the prediction of stress distribution and buckling of the cylindrical shell structures [8], analogous to humerus bone.…”

Section: Introductionmentioning

confidence: 99%

Micromechanical modeling of ductile fracture of human humerus

Rahmoun¹,

Naceur²,

Drazétic³

et al. 2020

JMES

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This paper deals with the formulation, development and validation of a newly developed micromechanical-based model for the modeling of the nonlinear ductile fracture of human humerus. The originality of the present works concerns the coupling between the micromechanical formulation based on the Mori-Tanaka homogenization scheme for cylindrical voids and the Marigo nonlinear ductile damage model based on the porosity growth. The proposed model was implemented as a User Material UMAT within the explicit dynamic software LS-DYNA and validated by numerical and experimental analysis conducted by a drop tower impact of human humerus. The outcome of the proposed multi-scale model appears to correctly predict the general trends observed experimentally via the good estimation of the ultimate impact load and the fracture patterns of the human humerus.

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A combined numerical and statistical analysis for prediction of critical buckling load of the cylindrical shell with rectangular cutout

Cited by 10 publications

References 1 publication

Effect of friction stir welding parameters on the residual stress distribution of Al-2024-T6 alloy

Effect of friction stir welding parameters on the residual stress distribution of Al-2024-T6 alloy

Condition monitoring of crack extension in the reinforcement adhesive joints by carbon nanotubes

Micromechanical modeling of ductile fracture of human humerus

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