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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...
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...
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...
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...
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