Research on the Constitutive Model of TA1 Thin-Walled Round Tube Nail Sleeve Based on Hardness
MA Junjie1, FENG Zhiguo1,2,*, KANG Fenhang1, LIU Yong1
1 College of Mechanical Engineering, Guizhou University, Guiyang 550025, China 2 Guizhou Key Laboratory of Special Equipment and Manufacturing Technology, Guizhou University, Guiyang 550025, China
Abstract: TA1 thin-walled round tube nail sleeve are widely used in aerospacefield due to their excellent mechanical properties. The nail sleeve has a gradient hardness distribution in the axial direction, so the conventional constitutive models cannot accurately predict its mechanical behavior. For this propose, a hardness-based TA1 Johnson-Cook (J-C) improved constitutive model and an artificial neural network (ANN) constitutive model was constructed to support the numerical simulation of thin-walled round tube nail sleeve. The quasi-static and dynamic compression tests of TA1 with different hardness were carried out to study the effects of hardness and strain rate on the mechanical properties of TA1. The improved J-C constitutive model and ANN constitutive model based on hardness were constructed on the basis of experiments, and the accuracy of the two models was analyzed. The numerical simulation of nail sleeve compression of thin-walled round tubes was achieved by embedding the two principal models into ABAQUS through the VUMAT and VUHARD user subroutines, respectively. The results show that both constitutive models have good prediction accuracy. The root-mean-square error of the improved J-C constitutive model is 38.54 MPa, and the average absolute error is 4.07%. While the root-mean-square error of the ANN constitutive model is 2.78 MPa, and the average absolute error is 0.37%. In terms of numerical simulation, the simulation results of the ANN constitutive model maintain a better consistency with the test results, and the relative error between simulation and test keeps within 5%, which can more accurately describe the mechanical behavior of the thin-walled round tube nail sleeve during compression.
马骏杰, 冯治国, 康分行, 刘勇. 基于硬度的TA1薄壁圆管钉套本构模型研究[J]. 材料导报, 2025, 39(23): 24090094-8.
MA Junjie, FENG Zhiguo, KANG Fenhang, LIU Yong. Research on the Constitutive Model of TA1 Thin-Walled Round Tube Nail Sleeve Based on Hardness. Materials Reports, 2025, 39(23): 24090094-8.
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2025, Vol. 39 
