Journal of Jilin University(Engineering and Technology Edition) ›› 2023, Vol. 53 ›› Issue (12): 3388-3396.doi: 10.13229/j.cnki.jdxbgxb.20220084

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Prediction of fracture of aluminum alloy profiles in roll bending considering anisotropy

Chun-guo LIU1,2(),Zi-tong LI1,2,Xue-guang ZHANG3,Ming LI1,2   

  1. 1.Roll-forging Research Institute，Jilin University，Changchun 130022，China
    2.School of Materials Science and Engineering，Jilin University，Changchun 130022，China
    3.Engineering Planning and Development Department，CRRC Changchun Railway Vehicles Co. ，Ltd. ，Changchun 130051，China
  • Received:2022-01-22 Online:2023-12-01 Published:2024-01-12

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Abstract:

An anisotropic roll bending fracture prediction method was proposed for 6005A aluminum alloy profile. Von Mises， Hill48 and Yld2004-18p yield criteria were used to describe the anisotropy of aluminum alloy respectively. Model parameters were determined by experiments and crystal finite element simulation. The results of simulation and roll bending test show that the predicted error of Mises yield criterion is more than 15%， Hill48 yield criterion is less than 5% and Yld2004-18p yield criterion is less than 3%. It shows that the finite element model coupled with the anisotropic yield criterion and the continuous damage criterion can predict the fracture behavior of aluminum alloy profiles in roll bending more accurately than the isotropic model.

Key words: material synthesis and processing technology, profiles roll bending, anisotropy, fracture criterion, crystal plasticity

CLC Number: 

  • TG386

Fig.1

Inverse pole figure （IPF） and pole figure of profile elevation"

Fig.2

Inverse pole figure （IPF） and pole figure of profile plane"

Fig.3

Representative volume element of 6005A"

Fig.4

Comparison of true stress-strain curves with CPFEM"

Fig.5

Anisotropic yield surfaces under different stress states in different planes"

Table 1

Yld2004-18p yield criterion parameters"

参数取值参数取值参数取值
c12'1.0223c44'0.9314c23″0.9932
c13'0.8537c55'1.0223c31″0.9314
c21'0.8722c66'0.8537c32″0.9329
c23'1.1434c12″0.8721c44″1.0038
c31'1.0038c13″1.1434c55″0.8998
c32'0.9932c21″1.0038c66″1.4962

Fig.6

Sections of profiles and finite element modeling"

Fig.7

Comparison of maximum equivalent stress"

Fig.8

Triaxiality-equivalent plastic strain curves"

Fig.9

Fracture position on T001 profile in roll bending"

Fig.10

Variation of I value with analysis step time"

Fig.11

Relation between I value with radius in roll bending"

Table 2

Avaluation of accuracy of minimum radius in roll bending"

型材实验临界辊弯半径/mm

Mises

屈服准则误差/%

Hill48

屈服准则误差/%

Yld2004屈服准则误差/%
T00165015.384.622.31
T00257517.394.352.61
T00377516.134.521.29
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