Properties of Three Phase Magneto-Electro-Thermo-Elastic Composites

2019 ◽  
Vol 969 ◽  
pp. 9-15
Author(s):  
Hardik Patel ◽  
Pavan Kumar Penumakala ◽  
Dhruv Patel
Keyword(s):  
Magnetoelectric Effect ◽  
Epoxy Composite ◽  
Effective Property ◽  
New Product ◽  
Longitudinal Direction ◽  
Coupling Coefficients ◽  
Effective Coupling ◽  
Property Variation ◽  
Three Phase ◽  
Elastic Composites

Three phase composites that consists of piezoelectric and piezomagnetic fibers embedded inan elastic matrix phase exhibits new product properties such as magnetoelectric effect, pyroelectric andpyromagnetic effect, which are absent in individual phases. In this work, simple analytical expressionsare developed based on strength of materials approach to find these effective coupling coefficients. In amicro scale rectangular representative volume element (RVE) of a layered type three phase composite,series connectivity is assumed between fiber and matrix layers along transverse direction and parallelconnectivity is assumed along longitudinal direction. The analytical model is validated with otherhomogenisation methods and effective property variation of BaTiO3-CoFe2O4-Epoxy composite andLiNbO3-CoFe2O4- Epoxy composite are discussed.

scholarly journals Effect of Combined Stresses on Fiber- Epoxy Composite Curved Pipe

2018 ◽  
Vol 26 (7) ◽  
pp. 58-71
Author(s):  
Fadhel Abbas Abdullah ◽  
Omar Emad Shukry
Keyword(s):  
Internal Pressure ◽  
Volume Fraction ◽  
Epoxy Composite ◽  
Fiber Composite ◽  
Bending Moment ◽  
Longitudinal Direction ◽  
Curve Pipe ◽  
Curved Pipe ◽  
Composite Curve ◽  
Composite Pipes

The aim of this research is to study the behavior of fiber epoxy composite curve pipe under internal pressure and bending moment. The specimens made from woven roving (Mat) fiber glass pipes and epoxy composite with 50% volume fraction are used to manufacturing curved pipe. The experimental work included manufacturing pipe specimens by vacuum bag technique. Pipe specimens were having 100mm inner diameter, 450 mm length of curvature center line of curve pipe with (43 degree) and two wall thickness are 4 and 3 mm. The test rig was designed and performed to study the effect of internal pressure and bending moment on the composite pipes. Also, the tensile test of the samples was done. The analytical expression solution has been accomplished to determine the strain, stress, for hoop and longitudinal direction. It is evident that the hoop stress for woven roving fiber composite pipe was more than longitudinal stress by almost (14%). The maximum internal pressure in the case of internal pressure only was more than compared to the combined internal pressure with bending moment by almost (115%). The most dangerous region is found in the inner arc of the curved pipe (intrude) area.

scholarly journals Renovation of Interest in the Magnetoelectric Effect in Nanoferroics

2018 ◽  
Vol 63 (11) ◽  
pp. 1006 ◽  
Author(s):  
M. D. Glinchuk ◽  
V. V. Khist
Keyword(s):  
Size Effects ◽  
Magnetoelectric Effect ◽  
Bulk Material ◽  
Bismuth Ferrite ◽  
Phenomenological Theory ◽  
Magnetoelectric Coupling ◽  
Theoretical Studies ◽  
Coupling Coefficients ◽  
Bulk Materials ◽  
Magnetoelectric Properties

Recent theoretical studies of the influence of the magnetoelectric effect on the physical properties of nanosized ferroics and multiferroics have been reviewed. Special attention is focused on the description of piezomagnetic, piezoelectric, and linear magnetoelectric effects near the ferroid surface in the framework of the Landau–Ginzburg–Devonshire phenomenological theory, where they are considered to be a result of the spontaneous surface-induced symmetry reduction. Therefore, nanosized particles and thin films can manifest pronounced piezomagnetic, piezoelectric, and magnetoelectric properties, which are absent for the corresponding bulk materials. In particular, the giant magnetoelectric effect induced in nanowires by the surface tension is possible. A considerable influence of size effects and external fields on the magnetoelectric coupling coefficients and the dielectric, magnetic, and magnetoelectric susceptibilities in nanoferroics is analyzed. Particular attention is paid to the influence of a misfit deformation on the magnetoelectric coupling in thin ferroic films and their phase diagrams, including the appearance of new phases absent in the bulk material. In the framework of the Landau–Ginzburg–Devonshire theory, the linear magnetoelectric and flexomagnetoelectric effects induced in nanoferroics by the flexomagnetic coupling are considered, and a significant influence of the flexomagnetic effect on the nanoferroic susceptibility is marked. The manifestations of size effects in the polarization and magnetoelectric properties of semiellipsoidal bismuth ferrite nanoparticles are discussed.

On Eshelby's S-tensor under various magneto-electro-elastic constitutive settings, and its application to multiferroic composites

2016 ◽  
Vol 01 (03n04) ◽  
pp. 1640002 ◽  
Author(s):  
Yang Wang ◽  
George J. Weng
Keyword(s):  
Effective Properties ◽  
General Procedure ◽  
Constitutive Relations ◽  
Magnetoelectric Coupling ◽  
Coupling Coefficients ◽  
Multilayer Composites ◽  
Inclusion Shape ◽  
Multiferroic Composite ◽  
Tensor Formula ◽  
Elastic Composites

The magneto-electro-elastic Eshelby S-tensor is the key to the study of linear effective properties of magneto-electro-elastic composites. There are eight different ways to write the constitutive relations, and each is associated with a specific kind of boundary condition and Eshelby S-tensor. In this work, we provide a general procedure to convert the magneto-electro-elastic Eshelby S-tensor from one system to another. As an application, we use it to calculate the magnetoelectric coupling coefficients of a piezoelectric–piezomagnetic multiferroic composite under stress-and strain-prescribed boundary conditions. We demonstrate that the calculated results are significantly different. In particular, it is shown that, under an applied stress, the magnetoelectric coupling coefficient [Formula: see text], is much stronger than that under an applied strain, while for [Formula: see text], the values are positive under a prescribed stress but negative under a prescribed strain. The effects of inclusion shape, volume concentration and geometrical exchange, are also examined. For ready applications, the explicit forms of S-tensor, [Formula: see text] and [Formula: see text], of 1-3 fibrous and 2-2 multilayer composites are also provided at the end.

Impact Compressive Character of Balanced Angle-Ply Carbon/Epoxy Composites

2011 ◽  
Vol 284-286 ◽  
pp. 132-135
Author(s):  
Chun Lei Tian ◽  
Ai Guo Pi ◽  
Feng Lei Huang
Keyword(s):  
Composite Laminates ◽  
Epoxy Composite ◽  
Longitudinal Direction ◽  
Strain Rates ◽  
Sample Type ◽  
Compression Loading ◽  
Epoxy Resin System ◽  
Strain Rate Compression ◽  
Pressure Bar ◽  
The Relationship

This paper discusses the response of balanced angle-ply graphite/epoxy composite laminates subjected to different strain rate compression loading using a compression split Hopkinson’s pressure bar (SHPB) and an MTS machine. Five types of laminates, with ply angles 0°, ±15°, ±45°, ±75°and 90°were manufactured using T700 carbon fiber with epoxy resin system by hand. Samples were subjected to compression loading at different strain rates along longitudinal direction. The stress-strain curves at different strain rates were compared for each sample type. Characteristics of the curves were summarized and the causes were analyzed. Finally, the relationship between failure strength and ply angles was analyzed.

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