基于损伤力学的增材制造金属材料疲劳寿命预测

洪海铭; 詹志新; 王佳莹

doi:10.13700/j.bh.1001-5965.2020.0722

基于损伤力学的增材制造金属材料疲劳寿命预测

doi: 10.13700/j.bh.1001-5965.2020.0722

1.
航空工业沈阳飞机设计研究所综合强度部，沈阳 110035
2.
北京航空航天大学航空科学与工程学院, 北京 100083

详细信息

通讯作者:
詹志新, E-mail: zzxupc@163.com

中图分类号: O346.2; V215.5
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- 被引次数: 0
出版历程
- 收稿日期: 2020-12-30
- 录用日期: 2021-04-11
- 网络出版日期: 2022-06-20
- 整期出版日期: 2022-06-20

Damage mechanics-based fatigue life prediction for additive manufacturing metal materials

1.
Comprehensive Strength Department, AVIC Shenyang Aircraft Design and Research Institute, Shenyang 110035, China
2.
School of Aeronautic Science and Engineering, Beihang University, Beijing 100083, China

More Information

Corresponding author: ZHAN Zhixin, E-mail: zzxupc@163.com

摘要

摘要:
增材制造(AM)技术发展迅速，广泛应用于航空航天领域合金构件的加工制造，而很多增材制造合金构件承受循环载荷，疲劳失效破坏十分普遍。通过建立考虑增材制造过程影响的疲劳损伤模型，计算了增材制造金属材料的疲劳寿命。给出了弹塑性本构模型和考虑增材制造过程参数的疲劳损伤模型，进而给出了疲劳寿命计算的有限元数值方法；对增材制造金属材料进行了疲劳寿命预测，预测值与试验值基本吻合，并从疲劳数据的分散性及增材制造金属材料内部的孔隙率2个方面分析了计算误差；讨论了体积能量密度比对增材制造金属材料疲劳性能的影响，并对结果进行了分析，为增材制造金属材料的疲劳损伤评定提供一种有效的方法。
- 增材制造(AM) /
- 金属材料 /
- 疲劳寿命 /
- 预估方法 /
- 体积能量密度比
Abstract:
The additive manufacturing (AM) technology develops rapidly and it is widely employed in the fabrication of aerospace alloy components.Many additive manufacturing alloy components bear cyclic loadings, and the fatigue failure is very common. The fatigue damage model considering the influence of additive manufacturing process is established and the fatigue lives of additive manufacturing alloy materials are predicted. The elastic-plastic constitutive model and the fatigue damage model considering the additive manufacturing process parameters are presented, and the finite element numerical method is presented for the fatigue life computation. The fatigue lives of additive manufacturing metal materials are predicted, which are basically consistent with the experimental results, and the computed errors are analyzed from two aspects including the scatter of fatigue data and the porosity in the additive manufacturing materials. The influence of the volume energy density ratio on the fatigue properties of additive manufacturing metal materials is discussed, and the results are analyzed. This research provides an effective method for the fatigue damage evaluation of additive manufacturing metal materials.
- additive manufacturing(AM) /
- metal materials /
- fatigue life /
- prediction method /
- volume energy density ratio

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图 1 SS316L合金的疲劳寿命预测结果

Figure 1. Predicted fatigue lives for SS316L

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图 2 SS316L合金疲劳寿命的变化曲线

Figure 2. Variation curves of fatigue life for SS316L

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图 3 Ti6Al4V合金的疲劳寿命预测结果

Figure 3. Predicted fatigue lives for Ti6Al4V

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图 4 Ti6Al4V合金疲劳寿命的变化曲线

Figure 4. Variation curves of fatigue life for Ti6Al4V

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表 1 标定的2种材料参数

Table 1. Two kinds of calibrated material parameters

材料 α β m n

SS316L 0.84 2.46 52 164 0.001 8

Ti6Al4V 0.9 2.89 70 405 0.004 26

下载: 导出CSV

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