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The traditional metal plate bending process is difficult to meet the requirements of modern shipbuilding industry, and this paper adopts a new incremental bending process for manufacturing metal plate based on minimum energy principle and dieless forming. This process uses a set of punches and a series of highly adjustable and head rotatable supports to complete the punching process by changing the...
Analyze the safety of flexible hoisting the overall roof with Sap200014.0 while constructing the COMAC ministry of installed plant. Find the influence of the overall structure stiffness under kinds of hoisting step and the bigger step which the structure can stand. The numerical simulation is carried out and the effect of unequal lifting on structural behaviors is analyzed. Numerical analysis and...
In order to study crack mechanism in stress triaxiality and fracture design of structure steel, the fracture experiments and numerical simulations were performed on 8 Q345 notched bar. Test results showed that crack initiated at the edge of the hole and the minimum section of the notched bars, quickly propagating perpendicular to loading direction. And that had obviously shear fracture trace, the...
The maximum principal stress, von Mises equivalent stress, equivalent creep strain in dissimilar welded joints between martensitic heat-resistant steel (T91) and bainitic heat-resistant steel (G102) are simulated by FEM under the conditions of 833K and inner pressure of 28MPa. The results show that the maximum principal stress and von Mises equivalent stress are quit high in the vicinity of weld/G102...
With the high development of the motor industry, there is a great demand for precise and complex auto parts. New forging processes, material and energy saving processes are very important to the production of new type of auto parts. But forging mechanism is very complicated,and numerical simulation is the most effective method for analyzing the plastic deformation process. In this paper, several key...
Fracture tests were performed on 10 structural steel tubes with circular hole. Test results indicate that crack initiate at the edge of the hole and propagate perpendicularly to loading direction. The initial crack come into being earlier with the magnification of the radius of the hole. Tubes with two holes behave more ductile than those with one hole. The numerical procedure implemented the generalized...
The impacts of Poisson ratio of core concrete on the bearing capacity of round-ended CFST tubular tower and non-uniform area were analyzed with test study and the sub-model technology, the most disadvantaged stress state of the structure under the triaxial compression was also studied. The results indicates that: with the variable concrete Poisson ratio, comparatively, the bearing capacity analysis...
As a promising green material in civil engineering construction, concrete filled steel tube has attracted an increasing attention. However, there may be vibrating imperfect in the construction progress and concrete shrinkage in the hydration process. Thus the application of concrete filled steel tube is not widely in practical engineering. In order to solve this problem, a method using expansive concrete...
Dry high-speed cutting of spiral bevel gear is a non-linear dynamic process, involving partial high cutting temperature, high shear fracture, and high strain rate and so on. The accurate description of gear materials' mechanical characteristics in such physical environment is the foundation of dry high-speed cutting numerical simulation. But so far, no papers have been found in this regard. In this...
TNT explosion super-pressure effect on steel reinforced concrete drop tower is calculated by semi-infinite space explosion similarity law method. And drop tower subjected to static loading is simulated by finite element software ABAQUS. The results indicate that super-pressure effect on drop tower is insignificant for thirty kilogram TNT. The stress distribution of drop tower under certain loading...
The finite element software ABAQUS is used to simulate numerically the relationship between the load and deflection of layered steel fiber reinforced concrete beam bended at three points. The result is very consistent with that of the relevant experiments, which shows that layered steel fiber reinforced concrete beam is not affected significantly in the elastic stage, but the ultimate bearing capacity...
In order to investigate the behavior of adhesive anchor group under combined moment and shear loading, a numerical simulation is carried out in this paper with finite element analysis. In studied models steel-to-concrete connections by post-installed adhesive anchor are used. The analysis results show that the failure of anchor steel occurs in all specimens and only slight concrete cone appears under...
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