The Experts below are selected from a list of 16002 Experts worldwide ranked by ideXlab platform
Sangwoo Kim - One of the best experts on this subject based on the ideXlab platform.
-
evaluation of bird strike induced damages of helicopter composite Fuel Tank assembly based on fluid structure interaction analysis
Composite Structures, 2019Co-Authors: Donghyeop Kim, Sangwoo KimAbstract:Abstract We numerically investigated the structural behaviors and damage of a bird strike on a composite Fuel Tank assembly of a commercial KUH-1 Surion utility helicopter based on a fluid-structure interaction analysis. A coupled Eulerian–Lagrangian method and a smoothed particle hydrodynamic method were applied to consider the sloshing of Fuel and replicate the impact behaviors of a bird strike, respectively. In addition, the Hashin failure criteria considering four composite damage modes was applied in the simulation. We found that not only the increase in the amount of Fuel but also the curved geometry had a negative effect on the structural safety of the composite Fuel Tank during the impact. These findings will be used as reference data and guidelines for bird strike tests and airworthiness certification in the future.
Donghyeop Kim - One of the best experts on this subject based on the ideXlab platform.
-
evaluation of bird strike induced damages of helicopter composite Fuel Tank assembly based on fluid structure interaction analysis
Composite Structures, 2019Co-Authors: Donghyeop Kim, Sangwoo KimAbstract:Abstract We numerically investigated the structural behaviors and damage of a bird strike on a composite Fuel Tank assembly of a commercial KUH-1 Surion utility helicopter based on a fluid-structure interaction analysis. A coupled Eulerian–Lagrangian method and a smoothed particle hydrodynamic method were applied to consider the sloshing of Fuel and replicate the impact behaviors of a bird strike, respectively. In addition, the Hashin failure criteria considering four composite damage modes was applied in the simulation. We found that not only the increase in the amount of Fuel but also the curved geometry had a negative effect on the structural safety of the composite Fuel Tank during the impact. These findings will be used as reference data and guidelines for bird strike tests and airworthiness certification in the future.
Haile Atsbha - One of the best experts on this subject based on the ideXlab platform.
-
modeling of complex parison formation in extrusion blow molding effect of medium to large die heads and Fuel Tank geometry
Polymer Engineering and Science, 2009Co-Authors: Azizehmitra Yousefi, Haile AtsbhaAbstract:This work presents the effect of die geometry and die gap opening on the extrudate swell phenomenon, in complex parison formation using the vertical wall distribution system (VWDS) and partial wall distribution system (PWDS). The BlowParison© software from IMI is used to predict the parison formation for a combined VWDS/PWDS system, accounting for swell, sag, and nonisothermal effects. This software couples a fluid mechanics approach to represent the die flow, with a solid mechanics approach to represent the parison behavior outside the die, and a mathematical swell model to account for the pronounced elongational and shear stresses at high Weissenberg numbers. The emphasis is placed on experimental validation of the predicted parison dimensions using four diverging die geometries and different sets of VWDS/PWDS profiles. The experimental and predicted weight profiles for a dissected Fuel Tank are also presented. Both experimental and simulation results suggest a strong dependence of extrudate swell to the die geometry in the die land zone. The results also demonstrate the validity of the numerical predictions for part design purposes given the multitude of experimental validations presented in this work. POLYM. ENG. SCI., 2009. Published by the Society of Plastics Engineers
-
modeling of complex parison formation in extrusion blow molding effect of medium to large die heads and Fuel Tank geometry
Polymer Engineering and Science, 2009Co-Authors: Azizehmitra Yousefi, Haile AtsbhaAbstract:This work presents the effect of die geometry and die gap opening on the extrudate swell phenomenon, in complex parison formation using the vertical wall distribution system (VWDS) and partial wall distribution system (PWDS). The BlowParison© software from IMI is used to predict the parison formation for a combined VWDS/PWDS system, accounting for swell, sag, and nonisothermal effects. This software couples a fluid mechanics approach to represent the die flow, with a solid mechanics approach to represent the parison behavior outside the die, and a mathematical swell model to account for the pronounced elongational and shear stresses at high Weissenberg numbers. The emphasis is placed on experimental validation of the predicted parison dimensions using four diverging die geometries and different sets of VWDS/PWDS profiles. The experimental and predicted weight profiles for a dissected Fuel Tank are also presented. Both experimental and simulation results suggest a strong dependence of extrudate swell to the die geometry in the die land zone. The results also demonstrate the validity of the numerical predictions for part design purposes given the multitude of experimental validations presented in this work. POLYM. ENG. SCI., 2009. Published by the Society of Plastics Engineers
K Yamane - One of the best experts on this subject based on the ideXlab platform.
-
A study on the effect of the total weight of Fuel and Fuel Tank on the driving performances of cars
International Journal of Hydrogen Energy, 1998Co-Authors: K YamaneAbstract:It is said that the weight of a vehicle has a large influence on the driving performances such as the Fuel economy, the driving range, the acceleration ability, the climbing ability and the maximum speed. However, much attention on the effect of the weight of vehicle on the driving performances has not been called and no study has ever been carried out. It is also true that the total weight of Fuel and Fuel Tank of future vehicles such as electric vehicles and hydrogen Fueled cars has a large influence on the weight of the vehicles. A study has been carried out scientifically to clarify the effect of the total weight of Fuel and Fuel Tank on the driving performances of the vehicle, whose weight excluding the weight of Fuel and Fuel Tank is 1500 kg. The following have been found in our study. 1.(1) Adopting the practical maximum total weight of Fuel and Fuel Tank of 300 kg, the driving range of electric vehicle was about 55 km and the driving range of the hydrogen vehicle with metal hydrides storage was about 100 km. But, the hydrogen vehicle with liquid hydrogen storage accomplished the driving range of about 400 km even when the total weight of Fuel and Fuel Tank was 100 kg.2.(2) Regarding the acceleration ability, the climbing ability, the total weight of Fuel and Fuel Tank had a large influence. Hydrogen vehicles with liquid hydrogen storage are most superior to electric vehicles and hydrogen vehicles with metal hydrides storage because of the light total weight of Fuel and Fuel Tank.3.(3) As a result, hydrogen vehicles with liquid hydrogen storage is most practical for passenger cars, trucks and buses compared with electric vehicles and hydrogen vehicles with metal hydrides storage.
Beomsoo Kang - One of the best experts on this subject based on the ideXlab platform.
-
a comparative study of stamping and hydroforming processes for an automobile Fuel Tank using fem
International Journal of Machine Tools & Manufacture, 2004Co-Authors: Beomsoo KangAbstract:The use of sheet metal in the hydroforming process for hollow bodies is a new manufacturing technology for the automotive industry. In this paper, a comparison is made between the forming processes of sheet hydroforming and conventional stamping for production of an automobile Fuel Tank using a commercial explicit FEM code. A modeling methodology for correlation between stamping and hydroforming is proposed in order to obtain the optimal process parameters for producing a sound hydroformed Fuel Tank. The simulation model for a conventional stamping process is also verified by comparison with experiment. Finally, it is concluded that the hydroforming process can produce a Fuel Tank with a more uniform and sound thickness distribution than the stamping operation.
