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최대 10 단어까지만 선택 가능합니다.
제안 방법
- In the computer simulation, a hybrid method that is combined with the SPH(smoothed particle hydrodynamics) method and the FE(finite element) method was used. And also a penetration depth equation for design of the cryogenic cutting system was derived to determine the design variables and operation conditions to cut a 10 mm thickness for steel. And the main components of the cryogenic cutting system were developed by using the obtained design values.
- In the computer simulation a hybrid method that was combined with the SPH (smoothed particle hydrodynamics) method and the FE (finite element) method was used. And also, a penetration depth equation for the design of the cryogenic cutting system was used to determine the design variables and operation conditions to cut a 10 mm thickness for steel. Finally, the main components of the cryogenic cutting system were developed by using the obtained design variables.
- In Figure 1, the upper part represents the computational process of the SPH and the lower part represents the FEA process. In the SPH part, the velocity and position of the particles are calculated at first, then the variable smoothing length and neighboring search are performed, and then the strain, stress, and forces of the SPH are calculated. The SPH and FEA are connected by nodes to a surface contact algorithm so if the SPH nodes are contacted to an FEA surface, the contact force of the FEA is calculated, and then a determination of the displacement, strain, and stress of the FEA are followed.
- In this paper, by using a computer simulation, the applicability of cryogenic cutting technology was analyzed. In the computer simulation a hybrid method that was combined with the SPH (smoothed particle hydrodynamics) method and the FE (finite element) method was used.
- In this paper, by using a computer simulation, the applicability of cryogenic cutting technology was analyzed. In the computer simulation a hybrid method that was combined with the SPH (smoothed particle hydrodynamics) method and the FE (finite element) method was used.
- This model contained the flow stress and hardness of a target material which are affected by a temperature drop of the target. In this study, performance variables and operational conditions were determined by using the predictive model proposed by Wang modified for a liquid nitrogen jet.
대상 데이터
- Steel 4340 was chosen as a metallic target material and garnet was also used as abrasive. Actually the jet fluid was combined with the liquid nitrogen abrasive, so in order to define the density of the fluid, an equivalent density was introduced.
- The metallic target was a 3-D block with a rectangular area of 10 Χ 10 mm2 and a thickness of 10 mm.
- The target material had a size of 30 mm Χ 15 mm Χ 10 mm, meshed by FEA and it had 41,600 elements.
이론/모형
- The results of the study show that fluid jets by mixing liquid nitrogen and an abrasive at 300 m/s are possible to cut a 10 mm thickness for a steel plate. And also the design variables and operation conditions were established by using a penetration depth equation for the cryogenic cutting technology. Finally, the main components; intensifier, attenuator, pipe, and nozzle of the cryogenic cutting system were manufactured on the basis of the obtained design variables and operation conditions.
- In this paper, by using a computer simulation, the applicability of cryogenic cutting technology was analyzed. In the computer simulation a hybrid method that was combined with the SPH (smoothed particle hydrodynamics) method and the FE (finite element) method was used. And also, a penetration depth equation for the design of the cryogenic cutting system was used to determine the design variables and operation conditions to cut a 10 mm thickness for steel.
- In this paper, by using a computer simulation the applicability of cryogenic cutting technology was analyzed. In the computer simulation, a hybrid method that is combined with the SPH(smoothed particle hydrodynamics) method and the FE(finite element) method was used. And also a penetration depth equation for design of the cryogenic cutting system was derived to determine the design variables and operation conditions to cut a 10 mm thickness for steel.
- For example, a numerical simulation of a high-velocity waterjet action on a target was studied in reference [9]. It employed the FEM and ALE (Arbitrary Lagrangian/Eulerian) methods to study the interactions between a waterjet and a target. But this approach also distorted some grid meshes and moreover the ALE formulation required much computational time due to an additional computational field.
- This paper used the hybrid method combined with the SPH method and with the FEA method to simulate the penetration process of cryogenic cutting technology. The liquid nitrogen and abrasive were modeled by SPH particles and the target metal was modeled by finite elements and also the jet velocity distribution was assumed as uniform.
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