scholarly journals Analysis of Fan Blade Vibration with a Non-Contact Method

2020 ◽  
Vol 50 (1) ◽  
pp. 341-357
Author(s):  
Pierluigi Porco ◽  
Radoslaw Przysowa ◽  
Daniele Botto
Keyword(s):  
Finite Element ◽  
Finite Element Modelling ◽  
Contact Method ◽  
Material Anisotropy ◽  
Blade Vibration ◽  
Element Modelling ◽  
Blade Tip ◽  
Fan Blade ◽  
Vibration Parameters ◽  
Good Agreement

AbstractComposite fan blades are more and more common both in aviation and ground applications. This work aims to characterize the vibration parameters of plastic blades installed in a wind tunnel fan by a non-contact method, namely blade tip timing (BTT). Blade dynamics was predicted with finite element modelling (FEM) and confirmed experimentally by tip timing measurements and analysis of data. BTT results were acquired and compared in two different configurations. A good agreement between predicted and measured frequency values was obtained for the fundamental mode. Significant differences were observed for the second and third modes due to material anisotropy and contact effects which could not be modelled because necessary material data were unavailable.

Finite-element modelling of two-disc shrink fit assembly and an evaluation of material pairs of discs

2010 ◽  
Vol 225 (2) ◽  
pp. 263-273 ◽  
Author(s):  
F Ozturk
Keyword(s):  
Finite Element ◽  
Stress Distribution ◽  
Finite Element Modelling ◽  
The Finite Element Method ◽  
Uniform Stress ◽  
Element Modelling ◽  
Hollow Shaft ◽  
Complex Shapes ◽  
Shrink Fit ◽  
Good Agreement

In this study, a two-disc shrink fit assembly was modelled in two dimension using ABAQUS/Standard to determine the interfacial pressures with respect to the interferences. Steel—steel and steel—aluminium material pairs were considered. Inner disc of the assembly was considered as hollow and solid shafts, respectively. The results indicate that the finite-element results were in good agreement with the analytical results. In the hollow shaft assembly, both the hollow shaft and the outer disc had non-uniform stress distribution. In the solid shaft assembly, uniform stress distribution for the solid shaft and non-uniform stress distribution for the outer disc were determined. It was pointed out that same pressure can be obtained by different interference with different material pairs. If the assembly has complex shapes, the finite-element method gives more comprehensive and accurate results than the analytical method.

Multiscale finite-element modelling of the electrical conductivity of polyvinylchloride–nickel composites

2018 ◽  
Vol 53 (9) ◽  
pp. 1255-1260
Author(s):  
Abdulrahman A Alghamdi ◽  
Hamzah A Alharthi
Keyword(s):  
Electrical Conductivity ◽  
Finite Element ◽  
Finite Element Modelling ◽  
Unit Cell ◽  
Element Modelling ◽  
Electrical Conductivities ◽  
Polymer Metal ◽  
Multiscale Finite Element ◽  
Nickel Composites ◽  
Good Agreement

The electrical properties of polymer–metal composites are strongly affected by the quantity, distribution, and arrangement of the metal particles in the polymer matrix. The effect of these factors was investigated in a polyvinylchloride–nickel composite by adopting a multiscale finite-element modelling approach. Modelling in the macroscale was used to determine the electrical conductivity of agglomerated particles with varying volume fractions of Ni. The calculated electrical conductivities were then incorporated into calculations on the microscale, using a composite unit cell. The electrical conductivity of the composite unit cell was in good agreement with experimental data.

scholarly journals Finite Element Modelling for Predicting the Puncture Responses in Papayas

Foods ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 442
Author(s):  
Nurazwin Zulkifli ◽  
Norhashila Hashim ◽  
Hazreen Haizi Harith ◽  
Mohamad Firdza Mohamad Shukery ◽  
Daniel Iroemeha Onwude ◽  
...  
Keyword(s):  
Experimental Data ◽  
Finite Element ◽  
Finite Element Modelling ◽  
Statistical Procedure ◽  
Agricultural Products ◽  
Fe Model ◽  
The Finite Element Method ◽  
Element Modelling ◽  
Mechanical Responses ◽  
Good Agreement

This study aims to develop a finite element (FE) model to determine the mechanical responses of Exotica papayas during puncture loads. The FE model of the puncture-test was developed using the ANSYS 19.1 software. The proposed framework combined the finite element method and statistical procedure to validate the simulation with the experimental results. Assuming the elastic-plastic behaviour of papaya, the mechanical properties were measured through tensile test and compression test for both skin and flesh. The geometrical models include a quarter solid of papaya that was subjected to a puncture test with a 2 mm diameter flat-end stainless-steel probe inserted into the fruit tissues at 0.5 mm/s, 1 mm/s, 1.5 mm/s, 2 mm/s, and 2.5 mm/s. The FE results showed good agreement with the experimental data, indicating that the proposed approach was reliable. The FE model was best predicted the bioyield force with the highest relative error of 14.46%. In conclusion, this study contributes to the usage of FE methods for predicting the puncture responses of any perishable fruit and agricultural products.

Finite Element Modelling of Cochlear Electrode Arrays

2021 ◽  
Vol 49 ◽  
pp. 47-52
Author(s):  
Jamal M. Al Samri ◽  
Abdulaziz S. Alaboodi
Keyword(s):  
Mechanical Properties ◽  
Finite Element ◽  
Finite Element Modeling ◽  
Material Properties ◽  
Finite Element Modelling ◽  
Medical Surgery ◽  
Electrode Arrays ◽  
Element Modelling ◽  
Significant Difference ◽  
Good Agreement

The implant of cochlear electrode arrays is standard nowadays as a result of the improvement of medical surgery, equipment, and material properties. In this paper, the finite element modeling FEM will be utilized to characterize the mechanical properties of the electrode arrays. The results show that a good agreement between the finite element results and the experimental. Besides, it shows that no significant difference between the tapered and uniform correctional electrodes.

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