Material modeling of 6000 series aluminum alloy sheets with different density cube textures and effect on the accuracy of finite element simulation

Yanaga, Daisaku; Kuwabara, Toshihiko; Uema, Naoyuki; Asano, Mineo

doi:10.1016/j.ijsolstr.2012.03.005

Cited by 49 publications

(19 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In these works, it was found that for the most part, a normality flow rule applies in relation to the work contours. Actually, it was experimentally confirmed that the yield functions determined to fit the work contours measured from the biaxial tensile tests gave closer FEA results to the measured data for hole expansion simulations (Hashimoto et al 2010;) and hydraulic bulge forming simulations (Yanaga et al 2012(Yanaga et al , 2014 than other yield functions.…”

Section: Introductionmentioning

confidence: 64%

“…Moreover, they conducted tension-internal pressure tests of 70−30 brass thin-walled tubes with linear stress paths and evaluated the differential hardening behavior as the work contours developed. One of the present authors developed biaxial tensile testing methods for sheet metals using cruciform specimens (Kuwabara et al 1998) and for tubular specimens (Ishiki et al 2011;Kuwabara and Sugawara 2013) to observe the differential hardening behavior of cold-rolled ultralow-carbon steel sheets (Kuwabara et al 1998(Kuwabara et al , 2002Kuwabara and Sugawara 2013), high-strength steel sheets Kuwabara and Nakajima 2011), aluminum alloy sheets (Kuwabara et al 2006;Yanaga et al 2012Yanaga et al , 2014, pure titanium sheets (Ishiki et al 2011;Sumita and Kuwabara 2014), and a magnesium alloy sheet (Andar et al 2012). In these works, it was found that for the most part, a normality flow rule applies in relation to the work contours.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effect of Biaxial Work Hardening Modeling for Sheet Metals on the Accuracy of Forming Limit Analyses Using the Marciniak-Kuczyński Approach

Hakoyama

Kuwabara

2015

Advanced Structured Materials

Self Cite

View full text Add to dashboard Cite

A servo-controlled tension-internal pressure testing machine with an optical 3D deformation analysis system (ARAMIS , GOM) was used to measure the multiaxial plastic deformation behavior of a high-strength steel sheet with a tensile strength of 590 MPa for a strain range from initial yield to fracture. Tubular specimens were fabricated by roller bending and laser welding the as-received flat sheet materials. Many linear stress paths in the first quadrant of the stress space were applied to the tubular specimens to measure the forming limit curve (FLC), forming limit stress curve (FLSC), and forming limit plastic work per unit volume (FLPW) of the as-received sheet material in addition to the contours of plastic work and the directions of the plastic strain rates. Differential hardening behavior was observed; the shapes of the work contours constructed in the principal stress space changed with an increase in plastic work. The observed differential hardening behavior was approximated by changing the material parameters and the exponent of the Yld2000-2d yield function as functions of the reference plastic strain. Marciniak-Kuczyński-type forming limit analyses were performed using both the differential hardening model and isotropic hardening models based on the Yld2000-2d yield function. It was found that the material model that is capable of reproducing both the work contours and the directions of the plastic strain rates measured for a strain range close to the fracture limit can give a more effective constitutive model for accurately predicting the FLC, FLSC, and FLPW.T. Hakoyama JSPS Research Fellow (Doctoral Course Students),

show abstract

Section: Introductionmentioning

confidence: 64%

Section: Introductionmentioning

confidence: 99%

Effect of Biaxial Work Hardening Modeling for Sheet Metals on the Accuracy of Forming Limit Analyses Using the Marciniak-Kuczyński Approach

Hakoyama

Kuwabara

2015

Advanced Structured Materials

Self Cite

View full text Add to dashboard Cite

show abstract

“…Regarding the biaxial tensile testing machines proposed in literature, see [10]. It should be noted that the biaxial tensile test method using a cruciform test piece has proven to be useful for accurately detecting and modeling the deformation behavior of sheet metals under biaxial tension and consequently improves the predictive accuracy of FEA for springback in stretch-bending [11], hole expansion in HSS sheet [12][13], surface deflection in automotive body panels [14], and hydraulic bulge forming of 6000 series aluminum alloy sheets [15]. A cruciform test piece is useful for biaxial load-unload tests of sheet metals [16] [17].…”

Section: Biaxial Tensile Testing Methods Using a Cruciform Test Piece mentioning

confidence: 99%

Multiaxial Stress Tests for Metal Sheets and Tubes for Accurate Material Modeling and Forming Simulations

Kuwabara

2014

Acta Metall Slovaca

Self Cite

View full text Add to dashboard Cite

This paper is a review of the mechanical testing methods developed by the author's research group: multiaxial stress test methods using a cruciform test piece and a tubular test piece. The former is useful for small strain ranges under several percent while the latter is useful for larger strain ranges (from yielding to fracture). These test methods are useful to determine appropriate materials model for performing accurate metal forming simulations. Special attention is given to the measurement and modeling of the anisotropic plastic deformation behavior of sheet metals commonly used in industry and to the validation of the material models based on phenomenological yield functions for large plastic strain ranges. The effects of material models used in metal forming simulations on the improvement of the predictive accuracy for forming defects are also discussed.Keywords: anisotropy; finite element analysis; formability; material model; mechanical test; sheet metal forming; yield function IntroductionThe establishment of trial-and-error-less manufacturing enhanced by forming simulation methods such as finite element analysis (FEA) is strongly desired in industry to shorten the product development period and reduce costs for prototype manufacturing. Improvement of the predictive accuracy for defect formation (such as fracture and springback) using FEA is key to realizing trial-and-error-less manufacturing. A material model is one of the key factors that affect the accuracy of FEA [1][2]. In metal forming processes, materials are subjected to multiaxial stress states and stress reversals. Therefore, the validity of the material models used in FEA should also be checked by multiaxial stress tests and stress reversal tests [3]. This paper reviews advanced material test methods for metal sheets and tubes to determine accurate material models for use in metal forming simulations. Special attention is given to the anisotropic plastic deformation behavior of lightweight metals, such as high-strength steels (HSS), aluminum alloys, and pure titanium sheets commonly used in industry, and to the validation of the material models based on anisotropic yield functions determined for large plastic strain ranges. Additionally, the effects of the material models on the improvement of the predictive accuracy of the forming simulations are discussed.

show abstract

“…The upper and lower dies were modeled in accordance with the experimental set-up as illustrated in Section 3.2. The Swift-type hardening law is usually applied for aluminum alloys because it exhibits good performance in postnecking hardening stage [38,39]. Here, Swift power law σ ¼ Kðε p þ ε 0 Þ n is assumed for determining stress ratio function.…”

Section: Mechanical Analysismentioning

confidence: 99%

A novel approach to determine plastic hardening curves of AA7075 sheet utilizing hydraulic bulging test at elevated temperature

Liu

Cai

et al. 2015

International Journal of Mechanical Sciences

View full text Add to dashboard Cite

Material modeling of 6000 series aluminum alloy sheets with different density cube textures and effect on the accuracy of finite element simulation

Cited by 49 publications

References 19 publications

Effect of Biaxial Work Hardening Modeling for Sheet Metals on the Accuracy of Forming Limit Analyses Using the Marciniak-Kuczyński Approach

Effect of Biaxial Work Hardening Modeling for Sheet Metals on the Accuracy of Forming Limit Analyses Using the Marciniak-Kuczyński Approach

Multiaxial Stress Tests for Metal Sheets and Tubes for Accurate Material Modeling and Forming Simulations

A novel approach to determine plastic hardening curves of AA7075 sheet utilizing hydraulic bulging test at elevated temperature

Contact Info

Product

Resources

About