Encontrados 7 documentos, a visualizar página 1 de 1
Numerical study on the influence of initial anisotropy on optimal blank shape
Padmanabhan, R.; Oliveira, M. C.; Baptista, A. J.; Alves, J. L.; Menezes, L. F.http://www.sciencedirect.com/science/article/B6V36-4TG8K7H-1/2/f5bb6c39fe2ad213cc96ece4a2f3a08e
Sensitivity study on some parameters in blank design
Oliveira, M. C.; Padmanabhan, R.; Baptista, A. J.; Alves, J. L.; Menezes, L. F.Sensitivity study on various numerical parameters is necessary for modeling a process. It is important to determine the influence of such parameters in order to achieve robust design. Initial blank shape is a process parameter that controls the quality of a formed part. This paper describes a blank shape optimization procedure that uses three numerical tools to determine an optimal blank shape for a formed part...
Blank design for deep drawn parts using parametric NURBS surfaces
Padmanabhan, R.; Oliveira, M. C.; Baptista, A. J.; Alves, J. L.; Menezes, L. F.Deep drawing is a forming process controlled by a number of parameters. The initial blank shape is one of the most important process parameter that has a direct impact on the quality of the finished part. This paper describes a new method to determine the optimal blank shape for a formed part using the deformation behaviour predicted by finite element simulations and salient features of NURBS surfaces. The prop...
Numerical simulation and analysis on the deep drawing of LPG bottles
Padmanabhan, R.; Oliveira, M. C.; Alves, J. L.; Menezes, L. F.Deep drawing is one of the most used sheet metal forming processes in the production of automotive components, LPG bottles and household goods, among others. The formability of a blank depends on the process parameters such as blank holder force, lubrication, punch and die radii, die-punch clearance, in addition to material properties and thickness of the sheet metal. This paper presents a numerical study made ...
Influence of draw restraining force on the springback in advanced high strength...
Padmanabhan, R.; Sung, Jihyun; Lim, H.; Oliveira, M. C.; Menezes, L. F.; Wagoner, R. H.Abstract Draw beads are used in sheet metal forming processes to regulate material flow and achieve higher quality in the parts. The draw beads impose draw restraining force on the blank which eliminates defects such as wrinkling, tearing and reduces springback. In a draw-bend test, the draw restraining force is imitated by the back force applied through a hydraulic ram. As the back force increases, large stra...
Influence of process parameters on the deep drawing of stainless steel
Padmanabhan, R.; Oliveira, M. C.; Alves, J. L.; Menezes, L. F.Optimization of process parameters in sheet metal forming is an important task to reduce manufacturing cost. To determine the optimum values of the process parameters, it is essential to find their influence on the deformation behaviour of the sheet metal. The significance of three important process parameters namely, die radius, blank holder force and friction coefficient on the deep-drawing characteristics of...
Effect of anisotropy on the deep-drawing of mild steel and dual-phase steel tai...
Padmanabhan, R.; Baptista, A. J.; Oliveira, M. C.; Menezes, L. F.Tailor-welded blanks made of dissimilar, uniform or non-uniform thickness materials have potential applications in automobile industries. Compared to the base metal, the formability of tailor-welded blank is less due to the presence of weld area and strength mismatch between component blanks. Most sheet metals used to produce tailor-welded blanks have anisotropy induced during pre-processing stage due to large ...
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