An experimental and numerical study of forming limits of AA5182-O

Ju, Long; Mao, Tingting; Li, Hongbo

doi:10.1007/s00170-015-6819-6

Cited by 5 publications

(2 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Huang [ 51 ] proposed a criterion of the second time-derivative of strain and the identified FLC for AHSSs, which showed good agreement with ISO method. The maximum in the second derivative has also been used by Banabic and co-workers [ 52 ], Jain and co-workers [ 53 , 54 ], Safdarian et al [ 55 ], and Ju et al [ 56 ]. Bagheriasl and Worswick [ 57 ] used the images obtained at the end of the FLC experiment and two criteria (sharp increase of major strain between images, or diminishing minor strain-rate) to assess the formability of AA3003 brazing sheet at elevated temperatures.…”

Section: Introductionmentioning

confidence: 99%

Plasticity and Formability of Annealed, Commercially-Pure Aluminum: Experiments and Modeling

Fones

Kinsey

et al. 2020

Materials

View full text Add to dashboard Cite

The plasticity and formability of a commercially-pure aluminum sheet (AA1100-O) is assessed by experiments and analyses. Plastic anisotropy of this material is characterized by uniaxial and plane-strain tension along with disk compression experiments, and is found to be non-negligible (e.g., the r-values vary between 0.445 and 1.18). On the other hand, the strain-rate sensitivity of the material is negligible at quasistatic rates. These results are used to calibrate constitutive models, i.e., the Yld2000-2d anisotropic yield criterion as the plastic potential and the Voce isotropic hardening law. Marciniak-type experiments on a fully-instrumented hydraulic press are performed to determine the Forming Limit Curve of this material. Stereo-type Digital Image Correlation is used, which confirms the proportional strain paths induced during stretching. From these experiments, limit strains, i.e., the onset of necking, are determined by the method proposed by ISO, as well as two methods based on the second derivative. To identify the exact instant of necking, a criterion based on a statistical analysis of the noise that the strain signals have during uniform deformation versus the systematic deviations that necking induces is proposed. Finite element simulation for the Marciniak-type experiment is conducted and the results show good agreement with the experiment.

show abstract

Section: Introductionmentioning

confidence: 99%

Plasticity and Formability of Annealed, Commercially-Pure Aluminum: Experiments and Modeling

Fones

Kinsey

et al. 2020

Materials

View full text Add to dashboard Cite

show abstract

“…Adequate ductility is an important engineering consideration, which allows the material to redistribute localized stresses. In the sheet forming engineering, the material ductility is usually assessed with forming limit diagram of sheet metal (Ju et al, 2015;Hussaini et al, 2015;Centeno et al, 2014;Min et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Prediction of forming limit in DP590 steel sheet forming: An extended fracture criterion

Liu

Zheng

et al. 2016

Materials & Design

View full text Add to dashboard Cite

In this paper, we propose an extended ductile fracture criterion to study forming limit of DP 590 steel sheet. This criterion involves two independent parameters, stress triaxiality η and Lode parameter µ base on continuum damage mechanics, and assume that the damaged and undamaged configuration obey same material plastic evolution law. Thereafter, the criterion is extended to sheet metal forming under plane stress assumption. The tensile tests and Nakajima tests are employed to investigate fracture mechanism and validate fracture criterion. The forming limit diagram (FLD) of DP590 steel sheet is obtained by Nakajima tests throughout fracture and necking features on the specimens, which represent the upper band and lower band of FLD respectively. The theoretical FLD are determined by proposed fracture criterion with left and right side of FLD respectively. The predicted FLD is in good agreement with the experimental determined FLD, which demonstrates the capability of forming limit prediction by current proposed fracture criterion.On the other hand, continuum damage mechanics (CDM) study damage evolution on a macroscopic scale by introducing an internal variable, normally denoted as D, to quantify the microscopic damage. This simplifies the constitutive formulation and thereby the parameter calibration but neglects the microscopic damage mechanisms. Several phenomenological ductile fracture criteria have been proposed in the literature. To name a few, for exam-35 ple, Cockcroft and Latham (1968) proposed a failure criterion by amending the equivalent plastic strain with the maximum principal stress. Johnson and Cook (1985) developed a criterion, which combined the parameters of stress triaxiality, strain rate, temperature and equivalent plastic strain. Zheng et al. (1995) introduced a ductile fracture criterion based on the analyses of void shape in various stages of plastic deformation, by including a critical 40 65

show abstract

Deep drawing and bulging forming limit of dual-phase steel under different mechanical properties

Kong

Zhang

Kong

2018

Int J Adv Manuf Technol

View full text Add to dashboard Cite

An experimental and numerical study of forming limits of AA5182-O

Cited by 5 publications

References 26 publications

Plasticity and Formability of Annealed, Commercially-Pure Aluminum: Experiments and Modeling

Plasticity and Formability of Annealed, Commercially-Pure Aluminum: Experiments and Modeling

Prediction of forming limit in DP590 steel sheet forming: An extended fracture criterion

Deep drawing and bulging forming limit of dual-phase steel under different mechanical properties

Contact Info

Product

Resources

About