【摘 要】
：
Press bend forming has been widely used as the traditional forming method for integrally stiffened aircraft panels.The aim of this study is to establish an FEM model for this forming process.A special
【出 处】
：
2012 Postdoctoral Symposium of China on Materials Science &
论文部分内容阅读
Press bend forming has been widely used as the traditional forming method for integrally stiffened aircraft panels.The aim of this study is to establish an FEM model for this forming process.A special simulation procedure and a calculation method for the punch and die boundary condition based on the bending line coordinates are proposed.The simulation of a seven step press bend forming process of doubly curved integrally stiffened aircraft panels is realized for the first time, and it could well simulate the real fabrication process, so that it could assist in studying this complicated forming process.Stress and strain distributions are analyzed in detail, which reveals the deformation mechanics of this process.With quantitative comparisons, it can be concluded that forming quality of the seven step press bend forming is quite good, considering both the forming precision and the surface quality.
其他文献
β type titanium alloys have recently attracted much attention because of its low elastic modulus, high corrosion resistance and good biocompatibility.A novel β type Ti35Nb2Ta3Zr alloy with low modulus
Large-scale synthesis of ZnO hexagonal pyramids was achieved by a simple thermal decomposition route of precursor at 240 ℃ in the presence of PEG400.The precursor was obtained by room-temperature soli
Hierarchical hollow spherical CdS nanostructures were synthesized via simple microwave hydrothermal(M-H) process using CdCl2·H2O and Na2S2O3·5H2O as source materials and adding ethylenediaminetetraace
Acyl cyanide was chosen as the nucleating agent to enhance the crystallization rate of bacterially synthesized P34HB, through blending both on blender at determined temperature for several minutes.The
To find a simple geometry modeling method for bionic bone structure with short compute time and automate process, the tissue engineering and rapid forming technology was applied in implant design and
The microstructure, texture and corrosion behavior of a multifunctional β3 Ti-23Nb-0.7Ta-2Zr-O (TNTZO, mole fracture, %) alloy under cold-swaging and different annealing conditions were investigated b
The impurity element species and the biological toxic element content of viscose fiber based C/C composites were determined by atomic fluorescence analyzer and inductively coupled plasma atomic emissi
Porous tantalum produced via carbon vapor deposition/infiltration of commercially pure tantalum onto vitreous carbon scaffold is currently available for use in orthopedic applications.However, the rel
Cuprous oxide (Cu2O) thin films have been deposited on glass substrate by reactive magnetron sputtering method using Cu target and argon-oxygen gas atmosphere.Effect of oxygen flow rate on structural
The nucleation and growth behaviors of primary Al phase in Al-20.8wt%Cu hypoeutectic alloy in high static magnetic fields were investigated with aid of differential thermal analysis (DTA).The DTA curv