This paper aims to numerically investigate the structural behavior of reinforced high-strength concrete (HSC) beams retrofitted by Carbon Fiber Reinforced Polymer (CFRP) sheets after cracking. Six pre-cracked HSC with CFRP having identical reinforcement are tested four-point loading until failure using Abaqus software, besides two others without as control beams. attached on three beam sides in...

paddy de-awning using a de-awner increases the uniformity and flow rate of paddy grains through the orifices of hoppers, bucket elevators and chutes. in this study the effects of paddy variety, rotational blade speed and moisture content on performance of a prototype de-awner machine were investigated. the experiment was conducted in a factorial design with three factors, variety (hashemi and b...

In this article, a three-dimensional finite element model (FEM) is used to predict the crack growth at weld toe of pre-fatigued T-joint that was repaired with remelting technique. The numerical models were developed using MSC.Marc software. Fatigue life estimated by integrating Paris-Erdogan law. stress intensity factors are obtained virtual closure technique (VCCT). T-welded joints, made S355 ...

In a paper given, experimental investigations have included the analysis of crack initiation and growth in welded joint steel for operation at elevated temperatures. For better understanding phenomenon propagation joints A-204 Gr. A steel, designed high-temperature high-pressure application, it is necessary to determine effect heterogeneity microstructural mechanical properties on fracture toug...

existence of cracks in industrial structures is one of the important causes of their failure, especially when they are subjected to important axial compressive forces that might lead to buckling. therefore, it must be considered in stress analysis and designing and loading of such structures. in this paper, the buckling and post-buckling behaviors of stainless-steel cracked plates under axial c...

Brittle materials, such as oxide glasses, are usually very sensitive to flaws, giving rise a macroscopic fracture strength that is much lower than predicted by theory. The same applies metallic glasses (MGs), with the important difference these can exhibit certain plastic strain prior catastrophic failure. Here we consider strongest alloy known, ternary Co55Ta10B35 MG. We show this macroscopica...

Crack fault of rotor is one of the most prominent problems faced by magnetic bearing rotor system. In order to improve the safety performance of this kind of machinery, it is necessary to research the vibration characteristics of magnetic bearing cracked rotor system. In this paper, the stiffness model of the crack shaft element was established by the strain energy release rate (SERR) theory. T...

In this paper, the transverse vibration of cracked nano-beam has been studied based on modified couple stress theory. Crack is modeled by a rotational spring that creates a discontinuity. Frequency equations of cracked nano-beam with some typical boundary conditions are derived and the frequency parameter for different crack positions, crack parameter and length scale parameters value are calcu...