The paper deals with a body having random 3D-distribution of two-phase inclusions: spheroidal mutually parallel voids as well differently oriented reinforcing stiff short fibers. By the effective field approach stiffness fourth-order tensor is formulated and found numerically. Simultaneous sequential embeddings inclusions are compared. Damage evolution described by modified Vakulenko?s to endoc...

Efficient optimization of topology and raster angle has shown unprecedented enhancements in the mechanical properties 3D printed materials. Topology helps reduce waste raw material fabrication parts, thus decreasing production costs associated with manufacturing lighter structures. Fiber orientation plays an important role increasing stiffness a structure. This paper develops tests new method f...

The problem of the out of plane buckling of polar orthotropic armuli under uniform internal or external pressure loading has been investigated with the assumption of axisymmetry by numerous researchers. In this paper, the buckling of polar and rectilinearly orthotropic annuli subjected to internal or external pressure loading is examined without restriction to axisymmetric buckling modes. The b...

In this paper, the optimal bead orientation problem of 3D shell/plate structures is investigated for both static and dynamic cases. Using a bending equivalent orthotropic shell design cell model, the optimal bead orientation problem is converted to an optimal orientation problem of bending equivalent orthotropic materials, and it is solved by a new energy based method. In the energy based metho...

Analysis for the generalized thermoelastic Lamb waves, which propagates in anisotropic thin plates in generalized thermoelasticity, is presented employing normal mode expansion method. The displacement and temperature fields are expressed by a summation of the symmetric and antisymmetric thermoelastic modes in the surface thermal stresses and thermal gradient free orthotropic plate, therefore t...

Title of Dissertation: CHARACTERIZATION, MODELING, AND OPTIMIZATION OF POLYMER COMPOSITE PIN FINS Raj Bahadur, Doctor of Philosophy, 2005 Directed By: Professor, Avram Bar-Cohen, Mechanical Engineering Increasing electronic product manufacturing volumes and cooling requirements necessitate the use of new materials and innovative techniques to meet the thermal management challenges and to contri...