Constitutive Modeling and Rupture Predictions of Al-6061-T6 Tubes Under Biaxial Loading Paths

Korkolis, Yannis P.; Kyriakides, Stelios; Giagmouris, T.; Lee, L.-H.

doi:10.1115/1.4001940

Cited by 39 publications

(11 citation statements)

References 10 publications

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“…To this end two 3D families of models were developed, the first based on conventional shell elements and the second based on solid elements. A second component of the work is the introduction of non-quadratic isotropic and anisotropic constitutive models to the problem, shown earlier to be essential for the prediction of rupture in free hydroforming of Al-6260-T4 and other Al alloy tubes ([14-26] I , [16]). …”

Section: Discussionmentioning

confidence: 99%

Hydroforming of anisotropic aluminum tubes: Part II analysis

Korkolis

Kyriakides

2011

International Journal of Mechanical Sciences

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Section: Discussionmentioning

confidence: 99%

Hydroforming of anisotropic aluminum tubes: Part II analysis

Korkolis

Kyriakides

2011

International Journal of Mechanical Sciences

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“…In the future, this work will be expanded to include pulsed biaxial loading of sheets using cruciform specimens (Kuwabara, 2007), and of tubes hydraulically expanded under axial load and internal pressure Kyriakides, 2008, 2009;Korkolis et al, 2010). The sheet experiments will allow the investigation of a much broader variety of loading paths.…”

Section: Discussionmentioning

confidence: 96%

Ductility of 304 stainless steel under pulsed uniaxial loading

Cullen

2013

International Journal of Solids and Structures

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a b s t r a c tThe enhanced ductility that 304 stainless steel is exhibiting under pulsed loading (Zhang and Yuan, 2009) is investigated here using a combination of experiments and analysis. The simplest loading case, i.e., uniaxial tension, was selected to avoid the complicating effects of multiaxial stress states and/or contact and friction with a rigid die. Three types of tensile tests were performed: monotonic, pulsed and hold. For a range of strain rates, the pulsed and the hold tests exhibited different elongation-to-fracture from the monotonic tests. Digital image correlation and infrared thermography were employed to further probe this behavior. It was discovered that since the pulsed tests lasted longer than the corresponding monotonic ones (i.e., those with the same loading speed) but the total plastic work expended was comparable, milder deformation-induced heating developed in the pulsed tests. Since the resulting temperature gradients act as imperfections that trigger the localization of deformation, the enhanced elongation-to-fracture in the pulsed tests was attributed to the milder gradients that developed. Subsequently, a special isothermal tension test was used to de-couple the mechanical from the thermal behavior of the material and was repeated at various strain rates and temperatures. The material properties determined from this test were used as input to coupled, thermomechanical finite element simulations of the experiments. Despite numerous simplifications, such as constant thermal properties with temperature, the simulations captured the essential physics of the problem and yielded very close predictions of the elongation-tofracture observed in the experiments.

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“…While the geometry of the specimens, as well as the loading conditions are different from those in the case of sheet drawing, both tests effectively measure behavior of aluminum sheets under multiaxial tension. The experimental results obtained by Korkolis et al [39] are shown in Figure 2. .…”

Section: Multiaxial Stretching Of Thin Metallic Platesmentioning

confidence: 87%

“…Korkolis and Kyriakides [37,38] and Korkolis et al [39] recently conducted a series of experiments on aluminum tubes subjected to internal inflation causing burst. The tests were carefully designed to investigate the localization and fracture under different radial stresses (which can be related to stress biaxiality) and strain paths.…”

Section: Multiaxial Stretching Of Thin Metallic Platesmentioning

confidence: 99%