|Table of Contents|

Simulation analysis of 304SS full-life cyclic mechanical behavior based on Chaboche hardening model(PDF)

《火箭推进》[ISSN:1672-9374/CN:CN 61-1436/V]

Issue:
2022年03期
Page:
40-49
Research Field:
研究与设计
Publishing date:

Info

Title:
Simulation analysis of 304SS full-life cyclic mechanical behavior based on Chaboche hardening model
Author(s):
LIU Shijie1;  WANG Zhao2;  LIU Jichao3;  LIANG Guozhu4
(1.Laboratory of Science and Technology onCryogenic Liquid Propulsion,Beijing Aerospace Propulsion Institute,Beijing 100076, China 2.Beijing Aerospace Propulsion Institute, Beijing 100076, China 3.Beijing Machine Tool Research Institutive-Precision Mechatronics Co., Ltd., Beijing 100102, China 4.School of Astronautics, Beijing University of Aeronautics and Astronautics, Beijing 102206, China)
Keywords:
304 stainless steel Chaboche hardening model yield plateau strain controlled experiment simulation
PACS:
V250.3,O341
DOI:
-
Abstract:
The purpose of this paper is to study the feasibility of the Chaboche hardening model to simulate the mechanical behavior of 304SS full life cycle under low cyclic load.Firstly, combined with the experimental data and simulation results, the reasons why the Chaboche follow-up/hybrid hardening model cannot simulate the yielding platform effect are analyzed.Then, the model that can simulate the first quarter cycle and the stable hysteresis loop is analyzed, and the solution of the problem is given accordingly.Finally, the feasibility of the Chaboche hardening model for simulating the full-cycle mechanical response of 304SS under±0.8 strain control is verified by the program.The results show that:① 304SS has an obvious yield plateau effect.Its initial yield stress is about 200 MPa and its yield strength reaches 400 MPa, which is the main reason why a set of the Chaboche hardening model parameters cannot be used to simulate the full life cycle ② 304SS shows the Masing/Non-Masing effect with the±0.9 strain range as the boundary.The 304SS Ramberg-Osgood model constants determined by the±0.8 strain control cycle curve are n0=34.713, ε0=0.002 24, σ0=430 MPa.This group of parameters is not suitable for the mechanical behavior curve of±3.0 high cyclic strain load control ③ The parameters of the Chaboche kinematic hardening model suitable for the first quarter cycle of 304SS are:C1=744 639 MPa, χ1=155 193, C2=71 633 MPa, χ2=3 014, C3=20 608 MPa, χ3=1 051, σy=380 MPa.Due to the difference in back stress, it is impossible to use different hardening model parameters for the first quarter cycle and subsequent cycles to simulate the stress-strain curve of 304SS full life cycle.This paper can provide a reference for the simulation analysis of mechanical behavior for 304SS structural components.

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