Composites with the gradient of Young's modulus constitute a new group of biomimetic materials which affect the proper distribution of stresses between the implant and the bone. The aim of this article was to examine the mechanical properties of gradient materials based on carbon fibre-polysulfone composite, and to compare them to the properties of a natural intervertebral disc. Gradient proper...

In this paper we will outline the advantages of using fiber bundles in modeling disordered materials. We will present the main aspects of classical fiber bundle models (FBMs) and highlight their ability to capture some essential aspects of composite materials. We then present some extensions of the classical FBM, modifying the way of interaction of fibers, failure law, deformation state and con...

Protective clothing performs a vital role in maintaining the safety of human in workplace. The developments in this field are proceeding to fulfill the needs with multifunctional materials at competitive costs. Recently, the protective clothing field introduces the usage of composite materials taking advantage of their outstanding properties. In this paper, the multifunctional performance of hy...

A computer model for the sintering of ceramic/polymer composite materials has been established based on empirical sintering rate data. The model calculates sintering depths which result from variations in the operating parameters which include laser power, beam speed, scan spacing, scan vector length, and initial temperatures of the powder and surroundings. Sintering depths measured in multiple...

Damage evolution in heterogeneous solids is modeled using transformation field analysis and imperfect interface model. Stress changes caused by local debonding are simulated by residual stresses generated by equivalent transformation strains or eigenstrains. Decohesion and both overall and local stress and strain rates are derived from thermodynamics of irreversible processes, which provide an ...

Advanced, waveform based acoustic emission (AE) techniques have been successfully used to evaluate damage mechanisms in laboratory testing of composite coupons. An example is presented in which the initiation of transverse matrix cracking was monitored. In these tests, broad band, high fidelity acoustic sensors were used to detect signals which were then digitized and stored for analysis. Analy...

The analytic continuation method of homogenization theory provides Stieltjes integral representations for the effective parameters of composite media. These representations involve the spectral measures of self-adjoint random operators which depend only on the composite geometry. On finite bond lattices, these random operators are represented by random matrices and the spectral measures are giv...

In this paper, composite materials and its properties are discussed in detail. It is also discussed their importance and replacement for metals because of their properties like low weight, corrosion resistance etc. Now-a-days, there is a great importance of usage of these materials in various applications in all Engg. Fields. The paper also brings out the manufacturing techniques and costs invo...

A number of animals have evolved to produce silk-based composite materials for a variety of task-specific applications. The review initially focuses on the composite structure of silk fibers produced naturally by silkworms and spiders, followed by the preparation and applications of man-made composite materials (including fibers, films, foams, gels and particulates) incorporating silk proteins ...

We present computer simulation data for the effective permittivity ~in the quasistatic limit! of a system composed of discrete inhomogeneities of permittivity e1 , embedded in a three-dimensional homogeneous matrix of permittivity e2 . The primary purpose of this paper is to study the related issue of the effect of the geometric shape of the components on the dielectric properties of the medium...