...S. Banerjee; K. A. Cook-Chennault Two-phase PZT-epoxy piezoelectric composites and three phase PZT-epoxy-Al composites were fabricated using a poling voltage of 0.2 kV/mm. The influence of aluminum inclusion size (nano and micron) and (lead zirconate titanate) PZT volume fraction on the dielectric...

... of Piezoelectric Ceramics, Rare-Earth Iron Alloys, and Polymer,” Appl. Phys. Lett., 81(20), p. 3831). The analytical model is extended to include the shape of a third phase inclusion to examine the influence of the shape (of the inclusion) on the effective dielectric constant of the composite. The dielectric...

... properties at a small scale by taking into account the effect of inhomogeneities such as grain boundaries, bimaterial interfaces, slip lines, and inclusions. In particular, the depletion potential of the cohesive interface is made consistent with the atomistic potential inside the bulk material...

... at the microdiscontinuity corresponds to that of the maximum strain during the initial overstrain and the nonlocal cyclic plastic shear strain range in the matrix near the intact or cracked inclusion is substantially increased for the same remote strain amplitude relative to the case without initial overstrain...

...Yao Koutsawa; Mohammed Cherkaoui; El Mostafa Daya The present work extends the multicoated micromechanical model of Lipinski et al. (2006, “Micromechanical Modeling of an Arbitrary Ellipsoidal Multi-Coated Inclusion,” Philos. Mag., 86(10), pp. 1305–1326) in the quasistatic domain to compute...

...Rajesh Prasannavenkatesan; David L. McDowell; Gregory B. Olson; Herng-Jeng Jou Nucleation of fatigue cracks at nonmetallic primary inclusions in high cycle fatigue of martensitic steel is computationally investigated. We explore the capabilities of an elastic interphase material adhered...

...Marek-Jerzy Pindera; Yogesh Bansal The response of metal matrix composites is affected by factors such as inclusion distribution and shape, inclusion/matrix interfacial bond, residual stresses, and fabrication-altered in situ matrix properties. These effects are studied using a finite-volume...

...El H. Barhdadi; P. Lipinski; M. Cherkaoui We consider a linearly elastic composite medium, which consists of a homogeneous matrix containing coated spherical inclusions. The composite is modeled by a four phase pattern consisting of inclusion, interphase, matrix layer, and equivalent homogeneous...

...Michael R. Haberman; Yves H. Berthelot; Mohammed Cherkaoui The self-consistent (SC) micromechanical model of a composite containing coated micro-inclusions, originally proposed in the static regime by Cherkaoui et al. (1994, J. Eng. Mater. Technol., 116, 274–278 ), is implemented in the quasistatic...

...Beomjoo Kim; Sangho Uhm; Changhee Lee; Jongbong Lee; Youngho An Submerged-arc-weld metal made with variations of heat-input and consumables were examined to study the inclusions and their effects on the Charpy impact energy of the weld metal as a measure of the toughness. From the analysis...

...L. Capolungo; M. Cherkaoui; J. Qu A self-consistent scheme is used to describe the behavior of nanocrystalline F.C.C. materials. The material is approximated as a composite with two phases. The inclusion phase represents the grain cores while the matrix phase represents both grain boundaries...

...Nao-Aki Noda; Yasuhiro Moriyama 20 March 2003 23 July 2003 29 06 2004 inclusions elastic constants internal stresses integral equations numerical analysis density functional theory elasticity It is known that most engineering materials contain some defects...

... inclusions” and, within the context of mechanical stress/strain analysis, allows modeling of elastically highly heterogeneous bodies with the aid of discrete Fourier transforms. Within the iterative scheme the proof of convergence depends critically upon the choice of an appropriate, auxiliary stiffness...

...R. S. Lakes; S. Kose; H. Bahia Concentrated suspensions of inclusions occur in asphalt and dental composite resins. Concentrated suspensions are also of use in achieving a combination of high stiffness and loss (the product E tan δ), desirable in damping layer and structural damping applications...

...Mohammed Cherkaoui, Professor; La´szlo´ S. To´th, Professor micromechanics plasticity dislocation motion twinning internal stresses inclusions elastoplasticity viscoplasticity grain size martensitic transformations dislocation structure crystal microstructure grain boundaries...

...T. C. Tszeng This paper presents the theoretical predictions of the stress state at the inclusion-matrix interface in discontinuous metal matrix composites by the generalized inclusion method. In the author’s previous works, this method had been extended to the elastoplastic deformation...