Low Cycle Fatigue Test Method for Thin Sheet Specimens Based on Elastoplastic Analytical Equation

被引：1

作者：

Zhang Z. ^{[1
]}

Cai L. ^{[1
]}

Han G. ^{[1
]}

Huang M. ^{[1
]}

机构：

[1] School of Mechanics and Aerospace Engineering, Southwest Jiaotong University, Chengdu

来源：

Jixie Gongcheng Xuebao/Journal of Mechanical Engineering | 2023年 / 59卷 / 06期

关键词：

analytic equation; energy density equivalence; low cycle fatigue; Manson-Coffin law; thin funnel specimens;

D O I：

10.3901/JME.2023.06.072

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Based on energy density equivalence and dimensional analysis, a new method is proposed for thin funnel specimen. A semi-analytical equation for Relation between displacement-amplitude and load-amplitude RDL was developed; Cyclic equivalent stress-amplitude and strain-amplitude CESS analytic equation of energy density equivalent representative volume element (RVE); Uniaxial strain-amplitude of material RVE at funnel root US-R semi-analytical equation; A new method for low cycle fatigue test of thin sheet specimens with universal material and geometry. The finite element analysis was carried out on 18 specimens with 5 geometrical sizes and 13 preset material combinations, and the low cycle fatigue test was carried out on G115 and 16Mn specimens. The results show that the equivalent stress-strain amplitude curves of the wafer funnel specimens predicted by the CESS analytic equation are in close agreement with the preset curves of the finite element equation. The cyclic equivalent stress-strain relations of G115 and 16Mn obtained by the new test method and Manson-Coffin law are in close agreement with the results of low cycle fatigue test of standard round bar specimens. © 2023 Editorial Office of Chinese Journal of Mechanical Engineering. All rights reserved.

引用

页码：72 / 83

页数：11

共 22 条

[1]

SHI K K, CAI L X，, CHEN L, Et al., A theoretical model of semi-elliptic surface crack growth[J], Chinese Journal of Aeronautics, 27, 3, pp. 730-734, (2014)

[2]

QI S, CAI L X，, BAO C, Et al., The prediction models for fatigue crack propagation rates of mixed-mode I-II cracks[J], Engineering Fracture Mechanics, 205, pp. 218-228, (2019)

[3]

QI S, CAI L X，, BAO C, Et al., Analytical theory for fatigue crack propagation rates of mixed-mode I–II cracks and its application-ScienceDirect[J], International Journal of Fatigue, 119, pp. 150-159, (2019)

[4]

GB/T 15248-2008 ， Metallic materials axial constant amplitude low cycle fatigue test method, (2008)

[5]

ISO 12106-2003，Metallic materials-fatigue testing–axial-strain-controlled method, (2003)

[6]

HE C，, HUANG C，, LIU Y J，, Et al., Effects of mechanical heterogeneity on the tensile and fatigue behaviours in a laser-arc hybrid welded aluminium alloy joint[J], Materials & Design, 65, pp. 289-296, (2015)

[7]

MARTIN J F, HORSTMAN R., Cyclic stress-strain and fatigue properties of sheet steel as affected by load spectra[J], Journal of Testing and Evaluation, 11, 1, pp. 66-74, (1983)

[8]

WISNER S B, REYNOLDS M B, ADAMSON R B., Fatigue behavior of irradiated and unirradiated Zircaloy and zirconium[J], American Society for Testing and Materials, 10, pp. 499-520, (1994)

[9]

MUGHRABI H., On 'multi-stage' fatigue life diagrams and the relevant life-controlling mechanisms in ultrahigh-cycle fatigue[J], Fatigue & Fracture of Engineering Materials & Structures, 25, 8-9, pp. 755-764, (2010)

[10]

HUANG Xuewei, Acquisition method of mechanical behavior of new structural materials, (2010)

← 1 2 3 →