Several types of cyclic stress were applied to specimens made an extruded magnesium alloy, AZ31, elucidate twinning, detwinning, and fatigue crack initiation mechanisms by electron backscattered diffraction analysis. In both the texture random orientation, twinning occurred under compressive exceeding yield strength. Detwinning only in upon subsequent application tensile less than strength mono...

Abstract: Reduced Beam Section (RBS) and Drilled Beam Section (DBS) are seismic moment resistant frame connections, introduced after 1994 Northridge earthquake. RBS connection has been tested under cyclic loading and showed acceptable performance. In this paper, seismic behavior of Drilled Beam Section (DBS) connection is studied numerically using finite element method. A drilled beam section ...

In offshore engineering, the sand beneath an embankment may be subjected to traffic loads, resulting in a series of engineering issues. The behaviour change under long-term load. A drained cyclic and post-cyclic monotonic triaxial tests were performed on Fujian with different relative densities. strength stress–dilatancy behaviours studied. results indicated that normalised peak ratio after loa...

Abstract Fatigue fracture is a unique failure mode of materials induced by repeated loading and crucial for the long-term stability used in cars aeroplanes. progressive localised structural damage material subjected to cyclic loading. The minimum strain amplitude that causes such much less than material’s yield under simple This observation leads widespread belief threshold fatigue smaller mono...