Sheet Metal Forming
Mostrando 1-12 de 28 artigos, teses e dissertações.
-
1. New Proposal to Calculate the Friction in Sheet Metal Forming Through Bending Under Tension Test
There are 6 different types of equations that have been formulated to measure friction through the bending under tension test, however, there is no work to show whether these calculations actually represent what is happening in a sheet metal stamping process. This paper aims to make a direct comparison between the bending under tension test and the sheet met
Mat. Res.. Publicado em: 20/01/2020
-
2. Effect of surface roughness and lubrication on the friction coefficient in deep drawing processes of aluminum alloy aa1100 with fem analysis
ABSTRACT Friction between the interface workpiece and tooling has considerable importance in sheet metal forming operations; an accurate description of the friction is necessary to analyze and design new workpieces and tooling. This work suggests a methodology to determine and evaluate the mean coefficient of friction (COF) using the Finite Element Method (F
Matéria (Rio J.). Publicado em: 16/09/2019
-
3. Effect of surface roughness and lubrication on the friction coefficient in deep drawing processes of aluminum alloy aa1100 with fem analysis 1
ABSTRACT Friction between the interface workpiece and tooling has considerable importance in sheet metal forming operations; an accurate description of the friction is necessary to analyze and design new workpieces and tooling. This work suggests a methodology to determine and evaluate the mean coefficient of friction (COF) using the Finite Element Method (F
Matéria (Rio J.). Publicado em: 20/05/2019
-
4. Efecto del cambio en el camino de deformación en la formabilidad de chapas de acero DP-780 y zinc Zn20
ABSTRACT The Forming Limit Diagram (FLD), frequently used to characterize the formability of sheet metals, is determined by assuming proportional loading histories up to the onset of necking. However, the limit strains are highly affected by strain-paths changes, which are very usual in real metal forming processes. The aim of this work is to analyze the eff
Matéria (Rio J.). Publicado em: 19/07/2018
-
5. Métodos temporales para determinar deformaciones límite en chapas metálicas
ABSTRACT The forming limit diagram (FLD) –broadly used to characterize sheet-metal formability– is made by means of strain measurement over the surface of stretched samples and the subsequent determination of limit-strain values associated with the onset of necking. Currently, researchers can make strain measurements with digital image-correlation analys
Matéria (Rio J.). Publicado em: 19/07/2018
-
6. Investigation of Electromagnetic Radiation Emission during Sheet Metal Incremental Micro Forming
Edge dislocations within the plastic zone ahead of a crack tip form accelerated electric line dipoles which give rise to the electromagnetic radiation (EMR) emissions in metal and alloys. This paper reports an experimental investigation to determine EMR radiation during incremental microforming of a thin aluminum sheet. The EMR signals emit from aluminum gra
Mat. Res.. Publicado em: 18/12/2017
-
7. Algorithmic Formulations of Evolutionary Anisotropic Plasticity Models Based on Non-Associated Flow Rule
Abstract In the present paper, orthotropic elasto-plastic constitutive formulations for sheet metal forming based on non-associated flow rule that assume distortion of yield function/plastic potential with ongoing deformation process are analyzed. The yield function/plastic potential are considered as two different functions with functional form as orthotrop
Lat. Am. j. solids struct.. Publicado em: 2017-10
-
8. The Evaluation of Process Parameters on Springback in V-bending Using the Flexforming Process
One of the most significant problems in bending sheet metals is the springback behavior caused by the elastic stress formed after the bending process. In this study, the effects of forming pressure, die angle and holding time on the springback behavior were experimentally investigated for V-bending using the flexforming process. Furthermore, springback behav
Mat. Res.. Publicado em: 24/07/2017
-
9. Parameters Determination of Yoshida Uemori Model Through Optimization Process of Cyclic Tension-Compression Test and V-Bending Springback
Abstract In recent years, the studies on the enhancement of the prediction capability of the sheet metal forming simulations have increased remarkably. Among the used models in the finite element simulations, the yield criteria and hardening models have a great importance for the prediction of the formability and springback. The required model parameters are
Lat. Am. j. solids struct.. Publicado em: 2016-10
-
10. Estudo da conformabilidade de abas convexas da liga de alumínio AA2024-O no processo de hidroconformação de chapas / Study on convex flanges formability of AA2024-O aluminum alloy sheets on hydroforming process
O processo sheet hydroform, ou hidroconformação de chapas, é realizado por meio de uma prensa composta por uma membrana de borracha, preenchido com um fluido hidráulico cuja função é atuar como uma matriz, exercendo esforços sobre uma chapa de metal (blank), que é então empurrada contra um punção rígido, fazendo-o adquirir o formato deste. Embor
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/09/2011
-
11. Simplified Mathematical Modeling for an Electromagnetic Forming System with Flat Spiral Coil as Actuator
This study presents mathematical modeling and calculation procedure for problems of electromagnetic forming of thin circular metal sheets using a flat spiral coil as actuator. The methodbased on the Biot-Savart Law focuses specifically on the calculation of the electromagnetic field generated by the flat coil and analysis of the circuit that models the elect
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2011-09
-
12. A hybrid approach for estimating the drawbead restraining force in sheet metal forming
In order to achieve better part quality in sheet metal forming the rate of the material flow into the die cavity must be efficiently controlled. This control is obtained using a restraining force supplied either by the blankholder tool, drawbeads or both. When the restraining force required is too high, the use of drawbeads is necessary, although excessive b
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2010-09