TY - JOUR
T1 - Equivalent method of evaluating mechanical properties of perforated Ni-based single crystal plates using artificial neural networks
AU - Zhang, Yamin
AU - Wen, Zhixun
AU - Pei, Haiqing
AU - Wang, Jiapo
AU - Li, Zhenwei
AU - Yue, Zhufeng
N1 - Publisher Copyright:
© 2019 Elsevier B.V.
PY - 2020/3/1
Y1 - 2020/3/1
N2 - Creep experiments were performed to study the mechanical characteristics of Ni-based single crystal superalloy samples with densely arranged air film holes. An equivalent model based on crystallographic theory coupled with continuous damage mechanics was developed. The equivalent method was proposed, combining artificial neural networks and the equivalent solid material concept. A series of experiments and calculation results on plates with diverse arrangement patterns and ligament efficiencies were compared to validate the accuracy of the proposed method. The results indicate that the creep curves of the simplified models agree well with the experimental results. The microstructural evolution observed by scanning electron microscopy can be evaluated using the evolution of the maximum resolved shear stress with the creep time. The damage distribution of the simplified models is consistent with the crack initiation location and propagation region of samples. Additionally, the slip system actuation of the simplified models is the same as that of the experimental results. The equivalent errors of the creep time, maximum resolved shear stress and creep damage are less than 15%, except for individual points, indicating that the equivalent method proposed in this study is feasible and accurate.
AB - Creep experiments were performed to study the mechanical characteristics of Ni-based single crystal superalloy samples with densely arranged air film holes. An equivalent model based on crystallographic theory coupled with continuous damage mechanics was developed. The equivalent method was proposed, combining artificial neural networks and the equivalent solid material concept. A series of experiments and calculation results on plates with diverse arrangement patterns and ligament efficiencies were compared to validate the accuracy of the proposed method. The results indicate that the creep curves of the simplified models agree well with the experimental results. The microstructural evolution observed by scanning electron microscopy can be evaluated using the evolution of the maximum resolved shear stress with the creep time. The damage distribution of the simplified models is consistent with the crack initiation location and propagation region of samples. Additionally, the slip system actuation of the simplified models is the same as that of the experimental results. The equivalent errors of the creep time, maximum resolved shear stress and creep damage are less than 15%, except for individual points, indicating that the equivalent method proposed in this study is feasible and accurate.
KW - Artificial neural networks
KW - Creep behavior
KW - Densely arranged air film holes
KW - Equivalent method
KW - Ni-based single crystal superalloys
UR - http://www.scopus.com/inward/record.url?scp=85075866842&partnerID=8YFLogxK
U2 - 10.1016/j.cma.2019.112725
DO - 10.1016/j.cma.2019.112725
M3 - 文章
AN - SCOPUS:85075866842
SN - 0045-7825
VL - 360
JO - Computer Methods in Applied Mechanics and Engineering
JF - Computer Methods in Applied Mechanics and Engineering
M1 - 112725
ER -