Mechanical properties testing of sheet metal by hydraulic bulge test

2014 ◽  
Author(s):  
Autthasit Dimarn ◽  
Charn Thanadngarn ◽  
Vichit Buakaew ◽  
Yongyuth Neamsup
Keyword(s):  
Mechanical Properties ◽  
Sheet Metal ◽  
Bulge Test ◽  
Hydraulic Bulge Test ◽  
Hydraulic Bulge ◽  
Mechanical Properties Testing

Determination of Mechanical Properties for the Hydroforming of Magnesium Sheets at Elevated Temperature

2005 ◽  
Vol 6-8 ◽  
pp. 779-786 ◽  
Author(s):  
J. Hecht ◽  
S. Pinto ◽  
Manfred Geiger
Keyword(s):  
Mechanical Properties ◽  
Elevated Temperature ◽  
Tensile Test ◽  
Flow Curve ◽  
Elevated Temperatures ◽  
Biaxial Stress ◽  
Bulge Test ◽  
Hydraulic Bulge Test ◽  
Hydraulic Bulge

Thanks to the low weight, magnesium alloys feature high specific strength and stiffness properties. Thus they prove to be promising materials for todays ambitious automotive light weight construction efforts. Due to their comparative low formability at room temperature the process of magnesium sheet hydroforming can be improved at temperatures higher than 200 °C by the activation of additional sliding planes. This paper illustrates the determination of mechanical properties for the hydroforming of magnesium sheets at elevated temperature. In particular the mechanical behavior at elevated temperature was investigated by means of the tensile test and of the hydraulic bulge test. For the determination of the strains an optical measurement system was introduced into the experimental set-up. The exact knowledge of the strain condition in the area of diffuse necking enabled the determination of the flow curve in the tensile test also beyond the uniform elongation. The influence of temperature and strain rate was analyzed as well as the influence of uni- and biaxial stress state on the flow curve. Using circular and elliptic dies with different aspect ratio the hydraulic bulge test served to determinate the forming limit curves at three different elevated temperatures.

Estimation of Fracture Toughness JIC by Miniature Specimen Hydraulic Bulge Test

2017 ◽  
Vol 898 ◽  
pp. 753-757
Author(s):  
Le Le Gui ◽  
Tong Xu ◽  
Bin An Shou ◽  
Han Kui Wang ◽  
Jing Xiang
Keyword(s):  
Fracture Toughness ◽  
Fracture Energy ◽  
Fracture Strain ◽  
Bulge Test ◽  
Miniature Specimen ◽  
Hydraulic Bulge Test ◽  
Hydraulic Bulge ◽  
Resistance Curves ◽  
Miniature Specimens ◽  
Load Deflection Curve

The fracture toughness tests and a new miniature specimen technology named hydraulic bulge test (HBT) of 3Cr1Mo1/4V at four service time were carried out. Four J-R resistance curves by single-specimen method with one inch CT specimens were obtained to compute the JIC. Different definitions of equivalent fracture strain according to the section morphologies of HBT testing specimens were compared, and fracture energy of miniature specimens with three different thicknesses (0.4mm, 0.5mm and 0.6mm) were also calculated. Results showed that the typical HBT load-deflection curve can be divided into four sections like SPT curve. Equivalent fracture strain and fracture energy EHB can be chosen as two fracture parameters for the HBT specimen. Ductile fracture toughness JIC can be related approximately linearly to both the equivalent fracture strain and fracture energy EHB.

Hydraulic Bulge Test of Electrodeposited Copper Foil

1999 ◽  
Vol 77 (2) ◽  
pp. 55-59 ◽  
Author(s):  
H. D. Merchant ◽  
M. G. Rozboril
Keyword(s):  
Copper Foil ◽  
Bulge Test ◽  
Hydraulic Bulge Test ◽  
Hydraulic Bulge

scholarly journals Study of the Hydraulic Bulge Test in T-shape Hydroforming Die

2015 ◽  
Vol 19 ◽  
pp. 70-76 ◽  
Author(s):  
Amir Ashrafi ◽  
Khalil Khalili
Keyword(s):  
Bulge Test ◽  
Hydraulic Bulge Test ◽  
Hydraulic Bulge
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