In this paper, the behavior of auxetic composites is interpreted in the light of Cosserat elasticity which admits degrees of freedom not present in the classical elasticity: The rotation of points in the material, and a couple per unit area or the couple stress. The prediction of the Young’s modulus is developed for a laminated periodic material made up of alternating aluminum and auxetic material, by using the Bécus homogenization technique.

The book provides a comprehensive exposition of the theory of dynamical systems and some apllications.Thus,the perturbed systems, shape memory alloys oscillators,collision of two solids,systems with friction and biodynamics systems are treated.

The aim of the paper is to analyze the free vibrations of a piezoceramic hollow sphere with radial polarization. Using the cnoidal method and a genetic algorithm solves the equations of a radially inhomogeneous spherically isotropic piezoelastic medium. The Reddy and the cosine laws represent the functionally graded property of material. It is seen that for a piezoceramic hollow sphere, the piezoelectric effect consists in increasing the values for

In this paper, the blood motion in vessels with small radius is analyzed. The blood is modeled as a micromorphic fluid containing deformable material particles with 12 degrees of freedom: three translations, three rotations and six stretch and shears. Seven micromorphic viscosity coefficients are introduced as a function of the initial particle concentration and are reconstructed by a genetic algorithm based on experimental data.

The main aim of nanomechanics is the modeling and characterization of the mechanical behavior of nanostructured materials and nanoelectromechanical systems. Scientific developments in this area include the creation of new materials with novel mechanical properties based on tailored nanostructures, understanding how mechanical responses and nonlinearities are influenced by building structures and components at the nanometer length scale, the atomistic-continuum

INSTITUTUL DE MECANICA SOLIDELOR al ACADEMIEI ROMANE, str. Ctin Mille nr. 15, sector 1 din Bucuresti scoate la concurs 2posturi de cercetatori postdoctorali (in matematica, fizica, respectiv inginerie mecanica) pentru DEZVOLTAREA DE NOI TEORII CUPLATE ATOMISTIC-CONTINUE CU APLICATII LA MODELAREA NANOCONTACTELOR SI A INDENTARII. Aceste posturi sunt finantate de Ministerul Educatiei si Cercetarii printr-un proiect de cercetare in sprijinul programelor

New computer resources and innovations in the field of intelligent materials, sensors and actuators, yield in recent years to an explosion of research centred on the optimum design of structures. Nevertheless, a gap persists between mathematical theories concerning intelligent structures and the achieving of practical engineering constructions. This book bridged the span contributing with theories and models to succeed the match of both mathematical

Inverse problems have a well-recognized position in research field of mathematics and its applications. The inverse problem reverses the role between the unknowns and the data. The book addresses the practical and concrete resolution methods for certain inverse problems related to material properties and behavior: the inverse Lagrange problem, determination of elastic constants of a monoclinic crystal, the behavior of initially deformed metallic