[1] Jiao Haihan, Yan Huadong, Jin Hui, et al. Evaluation of mechanical properties of cast steel nodesbased on GTN damage model [J]. Journal of Southeast University (English Edition), 2021, 37 (4): 401-407. [doi:10.3969/j.issn.1003-7985.2021.04.009]

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Evaluation of mechanical properties of cast steel nodesbased on GTN damage model()

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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:

37

Issue:

2021 4

Page:

401-407

Research Field:

Materials Sciences and Engineering

Publishing date:

2021-12-20

Info

Title:

Evaluation of mechanical properties of cast steel nodesbased on GTN damage model

Author(s):

Jiao Haihan¹;  2;  Yan Huadong¹;  3;  Jin Hui¹;  2

¹Jiangsu Key Laboratory of Engineering Mechanics, Southeast University, Nanjing 211189, China
²School of Civil Engineering, Southeast University, Nanjing 211189, China
³Test and Measuring Academy of Norinco Group, Huayin 714200, China

Keywords:

cast steel node;  Gurson-Tvergaard-Needleman(GTN)damage model;  bearing capacity;  model parameters

PACS:

TU512.9

DOI:

10.3969/j.issn.1003-7985.2021.04.009

Abstract:

Based on the Gurson-Tvergaard-Needleman(GTN)damage model considering the defect damage evolution, the influence of void defects caused by the casting process on cast steel nodes’ mechanical properties was studied. Firstly, based on the GTN damage model, the model’s parameter combination of G20Mn5N cast steel was given. Then, the mechanical properties of cast steel nodes were evaluated using the GTN damage model in ABAQUS software, and the influence of model parameters on the failure results was investigated. The results show that the cast steel node considering the GTN damage model fails under 1.93 times of the load. The bearing capacity is lower than that of the bilinear model, and the failure speed is faster. Changes in model parameters will cause a shift in the failure critical point. Meanwhile, the plastic strain index affects the void volume fractions, which shows different variation laws under uniaxial tensile and cyclic loads. Therefore, the GTN damage model establishes the relationship between the micro-defects and macro-mechanical properties of materials, which can better simulate the failure results of structures.

References:

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Memo

Memo:

Biographies: Jiao Haihan(1997—), male, graduate; Jin Hui(corresponding author), female, doctor, professor, jinhui@seu.edu.cn.
Foundation items: The National Key Research and Development Program of China(No. 2017YFC0805100), the National Natural Science Foundation of China(No. 51578137), the Priority Academic Program Development of Jiangsu Higher Education Institutions, the Open Research Fund Program of Jiangsu Key Laboratory of Engineering Mechanics.
Citation: Jiao Haihan, Yan Huadong, Jin Hui.Evaluation of mechanical properties of cast steel nodes based on GTN damage model[J].Journal of Southeast University(English Edition), 2021, 37(4):401-407.DOI:10.3969/j.issn.1003-7985.2021.04.009.

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