## What is/are Isotropic Composite?

Isotropic Composite - 9% increase in energy absorption is achieved by the quasi-isotropic composites comparing with the orthotropic composites under the same areal density, caused by enlarged stress dissipation and deformation areas as the yarn directions increase.^{[1]}Remarkably, experimental results demonstrate that by exciting such anisotropic composites along the alignment direction enhances the LFIH effect by more than 30%.

^{[2]}For anisotropic composite material cases, directivity plots can be extracted, containing the phase-velocities, group velocities, and slowness curves.

^{[3]}In this work, we studied the scattering behavior of an incident A0 guided wave mode propagating towards an impacted damaged zone created within a quasi-isotropic composite plate.

^{[4]}The paper introduces an approximate method for computing the effective conductivity of isotropic composites with imperfect interfaces in two-dimensional space.

^{[5]}Experimental results validated the feasibility of the developed acoustic field-assisted TPP process on printing anisotropic composites with spatially controlled material compositions.

^{[6]}This approach is finally validated through modal analysis of various anisotropic composite laminates.

^{[7]}Herein, we investigate the electrical resistance relaxation of anisotropic composites when they are subjected to an external electric field.

^{[8]}A deconvolutional neural network (DNN) is integrated into the ultrasound (UT) pulse-echo Lamb wave nondestructive evaluation (NDE) imaging technique to achieve subwavelength super-resolution defect images for the application of anisotropic composite airplane-laminated structures.

^{[9]}New analytical solutions for the static deflection of anisotropic composite beams resting on variable stiffness elastic foundations are obtained by the means of the Homotopy Analysis Method (HAM).

^{[10]}A hybrid model of nonlinear homogenisation of anisotropic composites was developed, based on the secant Eshelby's model of the second order.

^{[11]}The compression failure behaviors of CCF300/5228A quasi-isotropic composite laminates with prefabricated surface cracks were studied experimentally.

^{[12]}This analysis is necessary for the creation of anisotropic composites that are sensitive to external stimuli.

^{[13]}The paper shows the results of research on the stress-strain behavior of anisotropic composite materials in the structures of wood-metal slide bearings.

^{[14]}Herein, a series of bio-based anisotropic composite foams were fabricated from oil-in-water (o/w) high internal phase Pickering emulsions (Pickering HIPEs) stabilized by both bio-based poly (urethane-acrylate) (PUA) and poly (cyclotriphosphazene-co-4,4ʹ-sulfonyldiphenol) (PZS) particles.

^{[15]}The developed formulas take into account the cooperation of triaxial compressed concrete core and an anisotropic composite GFRP shell.

^{[16]}For a certain kind of shale or tight sandstones, which are viewed as isotropic composites, both the models work well.

^{[17]}Elastic modulus measurements of anisotropic composites under a magnetic field suggest that NBR composites have much better field-dependent magnetic properties than NR composites.

^{[18]}The results show that the resistive loss dominates the eddy current attenuation in less conductive and high anisotropic composites, resulting in a frequency independent attenuation law, which is very different from skin effect.

^{[19]}The widespread use of anisotropic composite dielectric coatings operating in the microwave range in various science-intensive areas has led to the search and selection of effective methods for radio wave nondestructive testing of their electrophysical parameters.

^{[20]}In this research, we applied a polynomial hybrid approach for modelling longitudinal guided waves propagating in anisotropic composites multi-layered pipes.

^{[21]}The aeroelastic instability of a high-aspect-ratio wing including anisotropic composite wing–spar in an incompressible flow is investigated.

^{[22]}7 mm, and compared it with the behavior of continuous fiber quasi-isotropic composite laminate with a similar plate thickness.

^{[23]}This opens up prospects for the use of anisotropic composite materials to ensure the thermal regime of the nanosatellite.

^{[24]}5 wt%, which is over 3 times that of the isotropic composite with the same BN content.

^{[25]}” Step deformation is the main mechanism of deformation and destruction of anisotropic composite materials upon impact.

^{[26]}The anisotropic composites damage evolution was characterized by Murakami-Ohno damage theory.

^{[27]}However, the structural response of shear walls reinforced with non-isotropic composite material nets, bonded with relatively low-strength and non-elastic mortar matrices is difficult to study with numerical models.

^{[28]}Due to extensive applications in engineering practice, analysis of heat transfer in three-dimensional anisotropic composites has remained to be an important research topic.

^{[29]}The widespread use of anisotropic composite dielectric coatings operating in the microwave range in various science-intensive areas has led to the search and selection of effective methods of radio wave nondestructive testing of their electrophysical parameters.

^{[30]}In this method, pure SH0 wave excitation was achieved using the adjustable angle beam transducers (ABT) in quasi-isotropic composite plates.

^{[31]}In what follows, we develop a coupled chemo-mechanical model to predict the oxidation response of this highly anisotropic composite material, based on an earlier developed multiphysics theory of bulk polymer’s oxidation.

^{[32]}Modern technology shows increased demands on the strength properties of machines, their parts, as well as various structures, reducing their weight, volume and size, which leads to the need to use anisotropic composite materials.

^{[33]}

## low velocity impact

A series of drop tower low-velocity impact tests were performed on quasi-isotropic composite plates.^{[1]}Quasi-isotropic composite laminates were subjected to low-velocity impact energy ranging from 2J to 4.

^{[2]}In order to elucidate the hygroscopic effects on impact-resistance of carbon fiber/epoxy quasi-isotropic composite plates, low-velocity impact tests are conducted on dry and hygroscopically conditioned plates, respectively, under identical configurations.

^{[3]}

## Transversely Isotropic Composite

The object of the research was a unidirectional transversely isotropic composite with a two-phase polydisperse structure - a piezo actuator cell and fragments of polydisperse fibrous structures.^{[1]}When both the matrix and the fibers are isotropic, for the 2D fiber distributions at least three direction arrangements of fibers are needed to build the fiber-reinforced transversely isotropic composite materials, and for the 3D fiber distributions at least six direction arrangements are needed to build the fiber-reinforced isotropic composite materials.

^{[2]}This paper develops a micropolar constitutive model for a transversely isotropic composite material comprised of a polymer matrix and unidirectional fibers.

^{[3]}In this paper, the strength and deformation behavior of transversely isotropic composite rock-like material, which consists of a hard rock-like material and a weak rock-like material, are first investigated under different confining pressures by using a rock triaxial testing system.

^{[4]}Failure initiation is predicted with state of the art failure criteria for transversely isotropic composite materials.

^{[5]}To illustrate the new constitutive equations, strain energy density functions in terms of the distortion tensor are provided for unconstrained and incompressible isotropic materials, incompressible transversely isotropic composite materials, and incompressible orthotropic composite materials with two families of fibers.

^{[6]}A discrete element (DE) model is developed to simulate, with low computational effort, the propagation of solitary waves in a linear array of spherical particles as well as their interaction with a transversely isotropic composite beam.

^{[7]}

## isotropic composite material

For anisotropic composite material cases, directivity plots can be extracted, containing the phase-velocities, group velocities, and slowness curves.^{[1]}The paper shows the results of research on the stress-strain behavior of anisotropic composite materials in the structures of wood-metal slide bearings.

^{[2]}This opens up prospects for the use of anisotropic composite materials to ensure the thermal regime of the nanosatellite.

^{[3]}” Step deformation is the main mechanism of deformation and destruction of anisotropic composite materials upon impact.

^{[4]}However, the structural response of shear walls reinforced with non-isotropic composite material nets, bonded with relatively low-strength and non-elastic mortar matrices is difficult to study with numerical models.

^{[5]}In what follows, we develop a coupled chemo-mechanical model to predict the oxidation response of this highly anisotropic composite material, based on an earlier developed multiphysics theory of bulk polymer’s oxidation.

^{[6]}Modern technology shows increased demands on the strength properties of machines, their parts, as well as various structures, reducing their weight, volume and size, which leads to the need to use anisotropic composite materials.

^{[7]}Technique of determination of permissible compressive stresses in products made of anisotropic composite materials with holes in joints “parent sheet - stiffening element” is introduced.

^{[8]}The modified representations are used to derive closed-form expressions for the local elastic fields and effective moduli of a macroscopically isotropic composite materials containing spherical and circular inhomogeneities with the interfaces described by the complete Gurtin-Murdoch and Steigmann-Ogden models.

^{[9]}However, bone is an anisotropic composite material made by mineral, proteins and water assembled in a hierarchical structure.

^{[10]}When both the matrix and the fibers are isotropic, for the 2D fiber distributions at least three direction arrangements of fibers are needed to build the fiber-reinforced transversely isotropic composite materials, and for the 3D fiber distributions at least six direction arrangements are needed to build the fiber-reinforced isotropic composite materials.

^{[11]}This paper develops a micropolar constitutive model for a transversely isotropic composite material comprised of a polymer matrix and unidirectional fibers.

^{[12]}For enhancing the chatter stability, using anisotropic composite materials in the preparation of boring bars proves to be an effective method so as to enhance the boring bar’s natural frequency and damping.

^{[13]}In many aerospace and mechanical applications, wings and rotor blades present complex geometric shapes and are made of advanced, highly anisotropic composite materials.

^{[14]}Anisotropic composite materials can be divided into three different fiber reinforcements, namely synthetic, natural, and hybrid fibers.

^{[15]}The effect of components of the thermal conductivity tensor of heat-protection material on heat fluxes from the gas to the body were studied based on the first obtained analytical solution of the problem of heat transfer in anisotropic composite material in conditions of a convective-conductive heat transfer flow around by a high-temperature gasdynamic boundary layer.

^{[16]}The applicability of both methods was further proven by analyzing the isotropic composite materials, a process involving the use of iron particles embedded in a dielectric matrix.

^{[17]}Failure initiation is predicted with state of the art failure criteria for transversely isotropic composite materials.

^{[18]}To illustrate the new constitutive equations, strain energy density functions in terms of the distortion tensor are provided for unconstrained and incompressible isotropic materials, incompressible transversely isotropic composite materials, and incompressible orthotropic composite materials with two families of fibers.

^{[19]}This paper presents a topology optimization method which is capable of designing both topology and orientation distribution of anisotropic composite material simultaneously.

^{[20]}This paper presents a fast numerical approach to optimize the localization of induced power in highly anisotropic composite materials with a large scale factor.

^{[21]}Design rules were developed for the optimization of anisotropic composite materials.

^{[22]}

## isotropic composite laminate

This approach is finally validated through modal analysis of various anisotropic composite laminates.^{[1]}The compression failure behaviors of CCF300/5228A quasi-isotropic composite laminates with prefabricated surface cracks were studied experimentally.

^{[2]}7 mm, and compared it with the behavior of continuous fiber quasi-isotropic composite laminate with a similar plate thickness.

^{[3]}Quasi-isotropic composite laminates were subjected to low-velocity impact energy ranging from 2J to 4.

^{[4]}In this paper, numerical model based on continuum damage mechanics is presented to predict the damage behavior in quasi-isotropic composite laminates under low-velocity impact conditions.

^{[5]}This research presents a numerical method to analyze the propagation characteristics of guided waves in multi-layered anisotropic composite laminates.

^{[6]}The paper deals with the determination of effective material parameters of anisotropic composite laminate structures using ultrasonic surface acoustic waves.

^{[7]}

## isotropic composite plate

A series of drop tower low-velocity impact tests were performed on quasi-isotropic composite plates.^{[1]}In this work, we studied the scattering behavior of an incident A0 guided wave mode propagating towards an impacted damaged zone created within a quasi-isotropic composite plate.

^{[2]}In this method, pure SH0 wave excitation was achieved using the adjustable angle beam transducers (ABT) in quasi-isotropic composite plates.

^{[3]}In order to elucidate the hygroscopic effects on impact-resistance of carbon fiber/epoxy quasi-isotropic composite plates, low-velocity impact tests are conducted on dry and hygroscopically conditioned plates, respectively, under identical configurations.

^{[4]}Due to wide application of anisotropic composite plates in modern engineering structures and they were studied rare in literature, the main goal of this work is to study dynamic stability analysis of general anisotropic composite plates.

^{[5]}It is thus proposed in this paper to investigate strategies for the spatial integration of common baseline-free methods (namely BI and RR) on an experimental case of damage on a highly anisotropic composite plate.

^{[6]}Experiments were conducted on cross-ply and quasi-isotropic composite plates with identical boundary conditions.

^{[7]}

## isotropic composite film

Anisotropic composite films of polyaniline (PANI) with single-walled carbon nanotube (SWCNT) were prepared by in-situ electro-polymerization on highly oriented high density polyethylene (HDPE) films.^{[1]}Further, anisotropic composite films exhibited in-plane thermal conductivity as high as ∼3.

^{[2]}This facile strategy should be applicable to other natural or synthetic polymers to fabricate anisotropic composite films with potential applications as optical devices, sensors, and actuators.

^{[3]}The influence of organoclays on the mechanical properties and drawability of these isotropic composite films was investigated.

^{[4]}

## isotropic composite beam

New analytical solutions for the static deflection of anisotropic composite beams resting on variable stiffness elastic foundations are obtained by the means of the Homotopy Analysis Method (HAM).^{[1]}In this paper, some analytical results via extended Galerkin method on free vibration characteristics of an anisotropic composite beam, which is modeled as a nonuniform thin-walled structure with a chordwise asymmetric closed cross-section and corrected the warping functions, are newly presented.

^{[2]}A discrete element (DE) model is developed to simulate, with low computational effort, the propagation of solitary waves in a linear array of spherical particles as well as their interaction with a transversely isotropic composite beam.

^{[3]}

## isotropic composite structure

This study presents a methodology to optimize an anisotropic composite structure, comprising in performing cross-section optimization of a topologically-optimized structure through an evolutionary optimization using a genetic algorithm (GA).^{[1]}Wave propagation characteristics in both isotropic and anisotropic composite structures can also be studied.

^{[2]}

## isotropic composite foam

Herein, a series of bio-based anisotropic composite foams were fabricated from oil-in-water (o/w) high internal phase Pickering emulsions (Pickering HIPEs) stabilized by both bio-based poly (urethane-acrylate) (PUA) and poly (cyclotriphosphazene-co-4,4ʹ-sulfonyldiphenol) (PZS) particles.^{[1]}Afterwards, PMOPZ was integrated with CNF to design an anisotropic composite foam via the unidirectional freeze-drying method.

^{[2]}

## isotropic composite cylinder

Such a problem has relevance to several problems of technological significance, for example blood vessels can be idealized as finite anisotropic composite cylinders.^{[1]}Such a problem has relevance to several problems of technological significance, for example blood vessels can be idealized as finite anisotropic composite cylinders.

^{[2]}

## isotropic composite dielectric

The widespread use of anisotropic composite dielectric coatings operating in the microwave range in various science-intensive areas has led to the search and selection of effective methods for radio wave nondestructive testing of their electrophysical parameters.^{[1]}The widespread use of anisotropic composite dielectric coatings operating in the microwave range in various science-intensive areas has led to the search and selection of effective methods of radio wave nondestructive testing of their electrophysical parameters.

^{[2]}