The Effect of Steel Plate on the Deflection of Self Reinforced Concrete Beam with and Without Opening

In this work aims at studying the influence of steel plate on the deflection of self- compacted reinforced concrete beams was investigated experimentally in this study to know the flexural behavior of these beams. Eight simply supported reinforced concrete beam were tested under the action of two point loads .The deflections of the beams with and without plate are measured. The steel plates of thickness (3 mm) with dimensions ( 170 × 350 mm) were used. These plates were sticked on the concrete beams using epoxy. The steel plate inside the beam was sticked with and without epoxy (epoxy type EP), while the beams were taken with and without opening (10 mm diameter). The results show that the plate increased the capacity of the beam by increased the value of failure load. Hence, the beam with internal plate with epoxy increased the failure load by 34.2% than beam without plate , and 24.6% than beam with internal plate without epoxy , and 19.7% than beam with external plate with epoxy .

Incommensurate Structures and Nanoscale Friction at Solid Interfaces

In this study, using numerical simulations based on an incommensurate lattice model at the nanoscale, we investigate the lattice structures of pinned surfaces and the lubrication dynamics of surfaces driven by a moving external plate or an external force. When the elasticity of the surface is changed, the maximum static frictional force shows anomalously complicated behavior under certain conditions. The kinetic frictional force shows peculiar resonant-type sliding velocity dependence, which is caused by phonon excitations, and leads to novel behaviors of lubrication.