文献类型：期刊文献

英文题名：A hardness-based constitutive model for numerical simulation of blind rivet with gradient hardness distribution

作者：Tao, Liang Feng, Zhiguo Jiang, Yulian Mo, Ningning Liu, Yong

第一作者：Tao, Liang;陶亮

通信作者：Feng, ZG[1]

机构：[1]Guizhou Univ, Sch Mech Engn, Guizhou, Peoples R China;[2]Guizhou Inst Technol, Sch Mech Engn, Guiyang, Peoples R China;[3]Guizhou Univ, Key Lab Special Equipment & Mfg Technol, Guiyang 550025, Peoples R China

第一机构：Guizhou Univ, Sch Mech Engn, Guizhou, Peoples R China

通信机构：corresponding author), Guizhou Univ, Sch Mech Engn, Guizhou, Peoples R China.

年份：2024

卷号：39

外文期刊名：MATERIALS TODAY COMMUNICATIONS

收录：;EI(收录号：20242316189806);Scopus(收录号：2-s2.0-85194557106);WOS:【SCI-EXPANDED(收录号:WOS:001249057200001)】；

基金：The authors gratefully acknowledge the support from the National Natural Science Foundation of China (Grant No.52165042) , Guizhou Provincial Science and Technology Projects (Grant No.20201Z049, Grant No.20201Y236) , Guizhou Provincial Science and Technology Supporting Program (Grant No.2023G308) , Excellent Young Talents Project of Guizhou Province (Grant No.20215617) , Guiyang Municipal Project for Fostering Science and Technology Talents (Grant No.202143- 1) . Guizhou University Talent Introduction Research Fund (Grant No.202209) . All authors approved the version of the manuscript to be published.

语种：英文

外文关键词：Constitutive model; Microstructural evolution; A286 Superalloy; Blind rivet; Numerical simulation

摘要：A286 superalloy blind rivets find extensive applications in the structural connections of aerospace equipment owing to their exceptional strength and heat resistance. However, the gradient hardness distribution within the rivet sleeves complicates achieving precise numerical simulation results with traditional constitutive models. This study aims to establish a constitutive model suitable for materials exhibiting gradient hardness to support the development of A286 superalloy blind rivets. Initially, quasi-static compression experiments were conducted on A286 superalloy samples at different hardness levels (160-324 HV), strain rates (0.01-10 s-1), and temperatures (25-600 degrees C). Subsequently, the influence of material microstructural evolution on flow stress during compression was investigated using electron backscatter diffraction technique. Furthermore, a hardness-based Johnson-Cook (J-C) constitutive model was developed by introducing hardness and offset compensation onto the original J-C model and compared with its counterpart. Finally, the hardness-based model was employed to simulate the bulge compression forming of A286 blind rivets and validated through experimental trials. The findings reveal that dislocation strengthening predominantly contributes to the increased material flow stress with escalating strain rates and sample hardness. Compared to the original J-C model, the stress prediction error of the hardness-based model reduced from 26.8 % to 2.9 %, effectively depicting the variation in material flow stress under different hardness values. The simulated values of bulge morphology, dimensions, and load closely align with experimental data, affirming the efficacy of the hardness-based model in numerically simulating blind rivets with gradient hardness distribution.