An automated hydraulic bulge tester

Young, Robert F.; Bird, J. E.; Duncan, J.L.

doi:10.1007/bf02833994

Cited by 85 publications

(31 citation statements)

References 1 publication

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“…Moreover, for a more accurate description, experimental data were collected in other stress states as well. In this work, hydraulic bulge tests [6] and disk compression tests [7] were performed to capture the material behaviour of AISI409L and AISI430 in the balanced biaxial tension stress state. From hydraulic bulge tests, the balanced biaxial stresses at different amounts of plastic work per unit volume were obtained and normalized by the uniaxial stresses in the RD as shown in Table 1 and Table 2.…”

Section: Experiments and Resultsmentioning

confidence: 99%

Constitutive modelling of ferritic stainless steel sheets

Barlat

Ahn

2009

Int J Mater Form

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In this work, uniaxial tensile tests, hydraulic bulge tests and disk compression tests were performed on two ferritic stainless steel sheet samples (AISI409L and AISI430). The flow stresses and r values in uniaxial and balanced biaxial tension stress states were obtained. These data were used to calculate the anisotropic coefficients of different yield criteria, Hill1948, Karafillis and Boyce1993, Yld2000-2d and Yld2004-18p. The yield surface evolution based on flow stresses determined at different amounts of plastic work per unit volume was assessed using Yld2004-18p.

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Section: Experiments and Resultsmentioning

confidence: 99%

Constitutive modelling of ferritic stainless steel sheets

Barlat

Ahn

2009

Int J Mater Form

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“…Moreover, for a more accurate description, experimental data were collected in other stress states as well. In this work, hydraulic bulge tests [28], and disk compression tests [13,29] were performed to capture the material behavior of AISI409L and AISI430 in the balanced biaxial tension stress state. In order to investigate the yield surface evolution, the uniaxial stresses were normalized by the balanced biaxial stresses at the different amounts of specific plastic work w = 2, 26 and 60 MPa for AISI409L (Table 2) and 3, 32 and 75 MPa for AISI430 (Table 3).…”

Section: Mechanical Testsmentioning

confidence: 99%

Constitutive modeling of ferritic stainless steel

Barlat

Ahn

2009

Int J Mater Form

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In this work, constitutive models, including phenomenological and crystal plasticity, were used to simulate the anisotropy behavior and texture evolution of two ferritic stainless steel sheets, AISI409L and AISI430. Uniaxial tension, hydraulic bulge and disk compression tests were performed to characterize the mechanical properties of the two materials, and to determine the yield surfaces at different amounts of plastic work. Meanwhile, X-ray diffraction and electron backscatter diffraction techniques were used to analyze the texture of undeformed and deformed specimens. Crystal plasticity simulations were performed to determine the plastic behavior in selected deformation paths. The analysis of the mechanical test results showed that the yield surface shapes were changing during deformation. Crystal plasticity results indicated that texture evolution was mainly responsible for the yield surface shape change, i.e., anisotropic workhardening, in AISI409L. For AISI430, the results were not completely consistent. More work is needed to understand the plastic behavior of this material.

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“…2) Johnson and Duncan 3) designed a special extensometer and spherometer accommodating the hydraulic bulge test, which consist of dial indicators and special jigs. Bell et al 4) and Young et al 5) developed a servo-controlled hydraulic bulge test machine to keep the strain rate constant during the experiment. According to the experiment of Ranta-Eskola, 6) the strain rate continuously increases for the constant oil flow test.…”

Section: Introductionmentioning

confidence: 99%

“…The deformation of the specimen is commonly evaluated on the basis of the assumption of the uniform deformation near the apex, that is, the meridional strain, radius of curvature, and stress are considered to be uniform near the apex. In the previous experiments, [3][4][5] the strain and radius of curvature were measured with a contact-type extensometer and spherometer. The accuracy of these measurements depends on the uniformity of deformation within the gauge lengths of the devices.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Stress and Strain Measurement Accuracy in Hydraulic Bulge Test with the Aid of Finite-element Analysis

Yoshida

2013

ISIJ Int.

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Numerical simulations of the hydraulic bulge test are carried out by the implicit static finite-element method. The sheet specimen is characterized as a rate-independent elastoplastic material with a powerlaw hardening rule. The stress and strain relationship of the specimen is evaluated from the internal pressure and nodal coordinates obtained in the finite-element simulation of the hydraulic bulge test. Varying the gauge lengths of the spherometer and extensometer and the ratio of the initial thickness to the diameter of the specimen, their influences on the estimated stress and strain are investigated. By comparing the estimated stress-strain relationship with that of exact input data, the stress and strain measurement accuracy is assessed. Furthermore, the stress state at the apex is examined for orthotropic specimens and is found to deviate by 1-5% from the equi-biaxial stress state.

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An automated hydraulic bulge tester

Cited by 85 publications

References 1 publication

Constitutive modelling of ferritic stainless steel sheets

Constitutive modelling of ferritic stainless steel sheets

Constitutive modeling of ferritic stainless steel

Evaluation of Stress and Strain Measurement Accuracy in Hydraulic Bulge Test with the Aid of Finite-element Analysis

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