考虑各向异性的铝合金型材辊弯断裂预测

doi:10.13229/j.cnki.jdxbgxb.20220084

摘要/Abstract

摘要：

以6005A铝合金型材为例，提出了一种考虑各向异性的铝合金型材辊弯断裂预测方法，分别采用von Mises、Hill48和Yld2004-18p屈服准则描述铝合金的各向异性，通过实验和晶体有限元模拟确定了模型参数。模拟结果与辊弯实验结果对比表明：采用Mises屈服准则的预测误差大于15%；采用Hill48屈服准则的预测误差小于5%；采用Yld2004-18p屈服准则的预测误差小于3%。说明使用各向异性屈服准则与连续损伤准则耦合的有限元模型，比各向同性模型能更准确地预测铝合金型材辊弯成形中的断裂行为。

关键词: 材料合成与加工工艺, 型材辊弯, 各向异性, 断裂准则, 晶体塑性

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

中图分类号:

TG386

刘纯国,李紫桐,张学广,李明. 考虑各向异性的铝合金型材辊弯断裂预测[J]. 吉林大学学报(工学版), 2023, 53(12): 3388-3396.

Chun-guo LIU,Zi-tong LI,Xue-guang ZHANG,Ming LI. Prediction of fracture of aluminum alloy profiles in roll bending considering anisotropy[J]. Journal of Jilin University(Engineering and Technology Edition), 2023, 53(12): 3388-3396.

图/表 13

图1

图2

图3

图4

图5

表1

Yld2004-18p屈服准则参数"

参数	取值	参数	取值	参数	取值
c $12'$	1.0223	c $44'$	0.9314	$c 23 ″$	0.9932
c $13'$	0.8537	c $55'$	1.0223	$c 31 ″$	0.9314
c $21'$	0.8722	c $66'$	0.8537	$c 32 ″$	0.9329
c $23'$	1.1434	$c 12 ″$	0.8721	$c 44 ″$	1.0038
c $31'$	1.0038	$c 13 ″$	1.1434	$c 55 ″$	0.8998
c $32'$	0.9932	$c 21 ″$	1.0038	$c 66 ″$	1.4962

表1

图6

图7

图8

图9

图10

图11

表2

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