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RISS 인기검색어
- 검색키워드
- 저자 : Thar M. Badri Albarody (검색결과 4 건)
- 무료
- 기관 내 무료
- 유료
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Dynamic analysis of laminated composite thermo-magneto-electro-elastic shells
Thar M. Badri Albarody,Hussain H. Al-Kayiem 대한기계학회 2014 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.28 No.12
Modeling of piezo-laminated shell structure and/or shell embedded smart lamina influenced by thermo-magneto-electro-elastic loadpresents a challenge to be formulated and solved. We derived an analytical model based on the first-order transversally shear deformationtheory with involvement of Codazzi-Gauss geometrical discretion. The present invented model and the desired boundary conditions wererigorouslyderived using Hamilton's principle with cooperationof Gibbs free energy functions. The model was castin theversion of a generallaminated composite shell of revolution, in order to be simplified to account for most occurring shell geometries, and intended forwide range of smart materials. To ensure a conventional effective medium model, a rectangular plane shell of zero and large curvatureswasselected for analysis to justify the model. Hence, the generic forced-solution procedures for the response were derived, and its naturalfrequencies were evaluated in a simply supported boundary condition. Investigatedexamples areaccompanied and noteworthy conclusionsdrawn which highlight the issues of the implementation of the exact solution, implication of the effects of the material properties,lay-ups of the constituent layers, and shell parameters on the free vibrational behavior.
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The transverse shear deformation behaviour of magneto-electro-elastic shell
Thar M. Badri Albarody,Hussain H. Al-Kayiem,Waleed Faris 대한기계학회 2016 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.30 No.1
Compared to the large number of possible magneto-electro-elastic shell theories, very few exact solutions determining the in-planestresses, electric displacements and magnetic inductions are possible. While, solving the magneto-electro-elastic shell equations in termsof thermo-magneto-electro-elastic generalized field functions on arbitrary domains and for general conditions exactly are not alwayspossible. In the present work, a linear version of magneto-electro-elastic shell with simply supported boundary conditions, solved exactly,provided that the lamination scheme is cross-ply or anti-symmetric angle-ply laminates. The exact solution that introduced herein canmeasure the in-plane stresses, electric displacements and magnetic inductions. It also allow for an accurate and usually elegant and conclusiveinvestigation of the various sensations in a shell structure. However, it is important for micro-electro-mechanical shell applicationsto have an approach available that gives the transverse shear deformation Behaviourfor cases that cannot examine experimentally. An investigated examples were accompanied and noteworthy conclusions were drawn which highlight the issues of the implementationof the exact solution, implication of the effects of the material properties, lay-ups of the constituent layers, and shell parameters on thestatic Behaviour.
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Damage detection in glass/epoxy composite structure using 8-12 GHz X-band
Alaa Raad Hussein,Thar M. Badri Albarody,Reza Alebrahim,M. Fayaz Bin Abd Hannan,Husam K. M. Al-Jothery,Monis Abdulmanan Abdullah,Najib Al-Shaibani 대한기계학회 2020 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.34 No.3
In this study, an electromagnetic wave 8–12 GHz X band microwave was utilized to detect various types of damage in a woven fabric composite structure. Damages, such as cracks, delamination, bubbles, and voids, were synthesized artificially in accordance to ASTM D2734. Variable thicknesses of composite structure were also analyzed, and the influence of defect on the transmitted signal was investigated. Network analyzer (ENA5701C) in Xband was utilized for this investigation. Detection was based on the changes in the electromagnetic properties, such as permittivity and permeability, and the reflection and transmission to microwaves were based on standard samples. These were implemented for each case of defect selected for this study. Experimental tests revealed that damage in the transparent glass/epoxy composite can be recognized clearly. Particularly, sample thickness was detected when the microwave was applied. This testing method can be considered an inline operation and non-destructive testing for such composites, especially during fabrication.
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Burst capacity of pipe under corrosion defects and repaired with thermosetting liner
Ali Akram,Zahiraniza Mustaffa,Thar M. Badri Albarody 국제구조공학회 2020 Steel and Composite Structures, An International J Vol.35 No.2
This paper aims at providing insights on the use of thermosetting liner for the repair of offshore pipelines exposed to corrosion and leakage. The work which covers both experimental and numerical approaches were aspired due to the high cost of repair for pipelines, limitations of thermoplastic material and limited study of reinforced thermosetting liner. The experiment involves a destruction test called the burst test, carried out on an API 5L X42 carbon steel pipe under four case studies, namely (i) intact pipe, (ii) pipe with corrosion defect, (iii) pipe with corrosion defect and repaired with thermosetting liner and (iv) pipe with leakage and repaired with thermosetting liner. The numerical simulation was developed to first validate the experimental results and later to optimize the design of the thermosetting liner in terms of the number of layers required to restore the original strength of the pipe. The burst test shows an improvement in 23% of the burst capacity for the pipe with corrosion defects, after being repaired with a three-layer thermosetting liner. The parametric studies conducted showed that with an addition of thermosetting layers, the burst capacity improves by an average of 1.85 MPa. In conclusions, the improvement in strength can be further increased with increasing thickness of the thermosetting liner. The thermosetting liner was also determined to fail first inside the host pipe.
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