Evaluation of deformation for titanium alloy sheet in single point incremental forming based on asymmetric yield function

Kim, Minki; Lee, Hyungrim; Park, Namsu

doi:10.1007/s12289-022-01712-5

Cited by 5 publications

(8 citation statements)

References 30 publications

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“…For the uniaxial tension and compression tests, specimens were prepared along three orientations 0°, 45° and 90° from the rolling direction (RD). The dimensions of specimens and the correction procedure for the data in the compression tests were referred to the previous works [10,23]. Figure 1 shows the obtained mechanical responses of the Ti6Al4V.…”

Section: Materials Characterizationmentioning

confidence: 99%

“…Since a 3D-DIC system was utilized to measure the strain data during the tension test while a laser extensometer was used during the compression test, the R-values were observed in only tension tests. The hydraulic bulge test [10] was additionally performed to obtain the biaxial tension flow stress. To characterize the anisotropic and the asymmetric yielding of the Ti6Al4V, an anisotropic and asymmetric yield function, CPB06ex2 [8], was employed.…”

Section: Materials Characterizationmentioning

confidence: 99%

“…The C' and C'', are the linear transformation tensors while S' and S'' are the deviatoric stress tensor. The CPB06ex2 was calibrated with the experimental data at a plastic work of 30 MJ/m 3 , stress (tension, compression and biaxial tension) and R-value (tension and biaxial tension), by solving the optimization problem [10]. The calibrated parameters in the CPB06ex2 are listed in Table 1.…”

Section: Materials Characterizationmentioning

confidence: 99%

“…The ISF test was performed by using a 3-axis CNC system [10] in order to make a truncated pyramid. Figure 3 shows the ISF testing system, the specimen dimensions, and the tool path of the stylus.…”

Section: Incremental Sheet Formingmentioning

confidence: 99%

“…This paper addresses the deformation prediction of the Ti6Al4V with the thickness of 1.3 mm in the ISF process by utilizing the numerical simulation with an anisotropic/asymmetric yield function and a model for the elastic modulus degradation. To handle the advanced technique, the previous work [10] are resummarized especially focusing on the performance of constitutive models.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Deformation Prediction of Titanium Alloy in Incremental Sheet Forming with Anisotropic and Asymmetric Yield Function

Kim

Park

2023

IOP Conf. Ser.: Mater. Sci. Eng.

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The present study is concerned with the prediction of deformation in incremental sheet forming (ISF) for a Ti6Al4V sheet. To investigate anisotropic and asymmetric behaviors, uniaxial tension and compression tests were conducted along the rolling direction (RD), diagonal direction (DD), and transverse direction (TD). A representative yield function for a HCP material, the Cazacu–Plunkett–Barlat (CPB06) yield criterion, was selected for constitutive modeling to take into account anisotropy/asymmetry-induced distortional yielding of the titanium alloy. The chord modulus degradation was confirmed through uniaxial loading–unloading tests. The ISF tests were carried out using a single contact-point tool following a truncated pyramid tool path. To predict the deformation during the ISF, finite element analyses were conducted with the ABAQUS explicit and the vectorized user-subroutine (VUMAT). The performance of various constitutive models was evaluated based on the comparison of deformed shapes and distribution of thickness from the experiment and the FEA.

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Section: Materials Characterizationmentioning

confidence: 99%

Section: Materials Characterizationmentioning

confidence: 99%

Section: Materials Characterizationmentioning

confidence: 99%

Section: Incremental Sheet Formingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Deformation Prediction of Titanium Alloy in Incremental Sheet Forming with Anisotropic and Asymmetric Yield Function

Kim

Park

2023

IOP Conf. Ser.: Mater. Sci. Eng.

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Change in geometry size and thinning rate in single-point incremental forming process of TA1 sheet: evaluation method and finite element analysis

Huang

Yue²,

Tang³

et al. 2023

Int J Adv Manuf Technol

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Accurate numerical prediction of ductile fracture and micromechanical damage evolution for Ti6Al4V alloy

et al. 2023

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A CPB06-based Stewart-Cazacu micromechanical damage model is implemented and validated for Ti6Al4V material. It provides accurate numerical predictions in terms of macromechanical material response and damage accumulation. The SC11−TNT damage model is implemented in the finite element (FE) software Lagamine following a semi-implicit cutting plane algorithm and a well-chosen flow rule approach. The damage of the material is characterized by the porosity ratio contained within the material. It is modelled by void nucleation, growth and coalescence mechanisms. The onset of the coalescence is established by a criterion based onThomason's approach. The macroscopic results obtained by the implemented model demonstrate a strong ability to predict the experimental elastoplastic mechanical behaviour of the material across a full deformation range and different types of loadings. At the microscopic level, the predicted accumulated porosity ratio of the material matrix at fracture exhibits a good correlation with the experimental observations. The element deletion feature, activated when a certain damage threshold is reached, provides a physical description of the loss of load-carrying capacity of the material during fracture.

show abstract

Evaluation of deformation for titanium alloy sheet in single point incremental forming based on asymmetric yield function

Cited by 5 publications

References 30 publications

Deformation Prediction of Titanium Alloy in Incremental Sheet Forming with Anisotropic and Asymmetric Yield Function

Deformation Prediction of Titanium Alloy in Incremental Sheet Forming with Anisotropic and Asymmetric Yield Function

Change in geometry size and thinning rate in single-point incremental forming process of TA1 sheet: evaluation method and finite element analysis

Accurate numerical prediction of ductile fracture and micromechanical damage evolution for Ti6Al4V alloy

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