with the expanding demand on application of magnesium alloys in automotive and aerospace industries, robust methods in fatigue characterization of commercially available magnesium alloys with high specific strength is anticipated. in this paper, rotating bending load controlled tests has been studied on specimens machined from an extrusion piece of az31b. due to asymmetric and anisotropic behav...

Abstract After reviewing many literature foundations, the thesis combines basic methods of elastic mechanics with mathematical knowledge, sets bipotential stress potential complex function and analyses relationship between component, strain component function, applies variable function. The expression relevant is derived, displacement boundary conditions surrounding rock shallow circular tunnel...