الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
The linear theory of micropolar elasticity has been developed by Eringen and Suhubi [35]. This theory is intended to be applied to such materials and for such problems where the ordinary classical theory of elasticity fails because of microstructure in the material. Metals, polymers, composites, soils, rocks and concrete are typical media with microstructure. Changes in temperature cause’s thermal effects on materials, some of these thermal effects include thermal stress, strain, and deformation. The first effect we will consider is thermal deformation. Thermal deformation simply means that as the ”thermal” energy (and temperature) of a material increase, so does the vibration of its atoms/molecules; and this increased vibration results in what can be considered a stretching of the molecular bonds, which causes the material to expand. Of course, if the thermal energy (and temperature) of a material decreases, the material will shrink or contract.
This thesis is interested to study and discuss the problem of generalized micropolar thermoelastic medium which, linear homogeneous and uniform properties, in two dimensions under the influence of different fields such as the of gravitational field, the magnetic field, the effect of laser pulse on the micropolar thermoelastic medium and fiber-reinforcement, as well as the effect of two temperatures on the micropolar thermoelastic medium using theories of generalized micropolar thermoelasticity and method of normal mode analysis. The ch.1 consists of thirteen sections contain a review of thermoelasticity. The ch.2, the DPL theory was used to study the influence of the rotation on micropolar thermoelastic isotropic medium with two temperatures. The ch.3, the normal mode analysis was used to investigate the effect of the rotation and the initial stress on micropolar thermoelastic isotropic medium in the context of the three-phase-lag-theory. The ch.4, the coupled theory, Lord-Schulman theory and Green-Lindsay theory were introduced to study the influence of rotation on generalized micropolar thermoelasticity subject to thermal loading due to laser pulse. The ch.5, the DPL theory was investigated to study the effect of the rotation and the gravity on a micropolar magneto-thermoelastic isotropic medium. The ch.6, the influence of the rotation, magnetic field, and thermal loading due to laser pulse was studied on the plane waves in a linearly fiber-reinforced thermoelastic isotropic medium.