An approximate numerical mthod is presented for analysis and determination of modal characteristics in straight, pretwisted non-unifom helicopter blades. The analysis considers the coupled flapwise bending (out of plane), chordwise bending (in plane), and torsion vibration of both rotating and non-rotating blades. The proposed method is based on the integral expansion of Green functions (struct...

A novel model of a hyperbolic two-temperature theory is investigated to study the propagation thermoelastic waves on semiconductor materials. The governing equations are studied during photo-excitation processes in context photothermal theory. outer surface o medium illuminated by laser pulse. generalized photo-thermoelasticity two dimensions (2D) deformation used many models (Lord–Shulman (LS)...

In this study, the second type of Green and Naghdi's thermoelasticity theory is applied to present the vibration of a nanobeam subjected to rectified sine wave heating based upon the nonlocal thermoelasticity theory. Both Young's modulus and thermal conductivity are considered to be linear functions of the temperature. The Laplace transform domain is adopted to solve the governing partial diffe...

project participants are becoming more aware of the high costs and risks associated with delay claims and their litigation. among delays, weather delay has an important role in projects performed in severe environmental conditions. this research is the extension of delay analysis techniques by approving analysis of weather delays using fuzzy logic. at the presented technique, first using a fuzz...

The problem of propagation spherical waves in a thermoelastic medium is considered. Two approaches to taking into account the mutual influence dynamic fields deformations and temperature are compared. A generalized model coupled thermoelasticity used for calculation first approach second one based on ratio theory thermal stresses, which neglecting change distribution under mechanical loads acti...