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Mostrando ítems 1-10 de 25
Artículo
On the Use of Strain Path Independent Metrics and Critical Distance Rule for Predicting Failure of AA7075-O Stretch-Bend Sheets
(MDPI, 2020-08)
The strain-based forming limit curve is the traditional tool to assess the formability of metal sheets. However, its application should be restricted to proportional loading processes under uniform strain conditions. ...
Ponencia
Preliminary investigation on homogenization of the thickness distribution in hole-flanging by SPIF
(Elsevier, 2017-06)
A drawback of the hole-flanging process by single-stage SPIF is the non-uniform thickness obtained along the flange. Multi-stage strategies have been used to improve it, however they increase notably the manufacturing time. ...
Artículo
On the Determination of Forming Limits in Polycarbonate Sheets
(MDPI, 2020-02)
By proposing an adaptation of the methodology usually used in metal forming, this paper aims to provide a general procedure for determining the forming limits, by necking and fracture, of polymeric sheet. The experimental ...
Ponencia
Numerical study on the thickness homogenization in hole-flanging by single-point incremental forming
(Institute of Physics Publishing, 2018-08)
Incremental sheet forming is a novel technology that has significant benefits compared to conventional forming. However, it is a time-consuming process that is usually carried out in several forming stages to homogenize ...
Artículo
Analysis of formability in conventional hole flanging of AA7075-O sheets: punch edge radius effect and limitations of the FLC
(Springer, 2020-03)
Hole flanges are commonly manufactured in mass production by conventional press-working. In an industrial context, the process limits are usually evaluated by means of the Limiting Forming Ratio (LFR), which defines the ...
Artículo
Analysis of the influence of stress triaxiality on formability of hole-flanging by single-stage SPIF
(Elsevier, 2019-02)
Traditionally the fracture in sheet metal forming is characterized by the fracture forming limit (FFL) curve typically obtained by using conventional Nakajima tests. This curve is implicitly assumed a material property. ...
Ponencia
Experimental Study on the Evaluation of Necking and Fracture Strains in Sheet Metal Forming Processes
(Elsevier, 2013)
In this paper the formability of AA2024-T3 metal sheets is experimentally analyzed. For this purpose, a series of StretchBending and Incremental Sheet Forming (ISF) tests are carried out. The former tests allow determine ...
Tesis Doctoral
Análisis del efecto del gradiente de deformaciones en el conformado de Chapa Metálica
(2012-08-01)
Los procesos de conformado de chapa se usan extensivamente para fabricar carrocerías de automóviles, fuselajes de aeronaves, revestimientos de electrodomésticos, etc. Los principales problemas de conformabilidad en tales ...
Artículo
Stretch-flanging of AA2024-T3 sheet by single-stage SPIF
(Elsevier, 2021-03)
Flanging is a forming process that is commonly used in many high technology industrial applications such as the manufacturing of thin-walled aircraft structures as wing ribs that are formed using rubber-pad forming during ...
Ponencia
Experimental and numerical analysis of the flanging process by SPIF
(Institute of Physics Publishing, 2018-08)
This paper analyses the flangeability of AA2024-T3 sheets using single point incremental forming (SPIF). With this purpose, a series of process parameters is considered including flange length and width, tool radius and ...