A simplified plasticity model for multiaxial non-proportional cyclic loading

被引:1
作者
Madrigal, C. [1 ]
Navarro, A. [1 ]
Chaves, V [1 ]
机构
[1] Univ Seville, Escuela Tecn Super Ingn, Dept Ingn Mecan & Fabricac, Camino Descubrimientos S-N, Seville 41092, Spain
关键词
Cyclic plasticity; Crack tip plastic zone; Multiaxial fatigue; Local strain approach; Non-proportional loading; CONSTITUTIVE MODEL; DEFORMATION;
D O I
10.1016/j.tafmec.2019.102247
中图分类号
TH [机械、仪表工业];
学科分类号
0802 ;
摘要
Cyclic plasticity constitutive equations are required in fatigue and fracture analysis for the quantification of the plastic zone at notches or during fatigue crack growth. This work describes a constitutive model that reproduces the behaviour of stabilized metals subjected to multiaxial cyclic loads. The model is based on the idea of distance in the stress space which is calculated with a metric tensor. This metric tensor is a material property and can be empirically determined. In addition, the flow rule employs another material property known as hardening modulus. Procedures to calculate these material properties from experimental data are developed for the non-proportional loading case. The model gives good results for complex loading histories both from the qualitative and quantitative point of view. It also predicts the stabilized stress values in 90 degrees out-of-phase tensile-torsion tests.
引用
收藏
页数:9
相关论文
共 23 条
[11]   Plasticity theory for the multiaxial Local Strain-Life Method [J].
Madrigal, C. ;
Navarro, A. ;
Vallellano, C. .
INTERNATIONAL JOURNAL OF FATIGUE, 2017, 100 :575-582
[12]   Biaxial cyclic plasticity experiments and application of a constitutive model for cyclically stable material behaviour [J].
Madrigal, C. ;
Navarro, A. ;
Chaves, V. .
INTERNATIONAL JOURNAL OF FATIGUE, 2016, 83 :240-252
[13]   Numerical implementation of a multiaxial cyclic plasticity model for the Local Strain method in low cycle fatigue [J].
Madrigal, C. ;
Navarro, A. ;
Chaves, V. .
THEORETICAL AND APPLIED FRACTURE MECHANICS, 2015, 80 :111-119
[14]  
Madrigal C., 2011, AN MECANICA FRACTURA, V28-II, P571
[15]  
Madrigal C., 2013, AN MECANICA FRACTURA, V30-I, P187
[16]  
McDowell D.L., 1982, ASTM STP, V770, P500
[17]   A constitutive model for elastic-plastic deformation under cyclic multiaxial straining [J].
Navarro, A ;
Brown, MW .
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES, 1997, 20 (05) :747-758
[18]   A constitutive model for elastoplastic deformation under variable amplitude multiaxial cyclic loading [J].
Navarro, A ;
Giráldez, JM ;
Vallellano, C .
INTERNATIONAL JOURNAL OF FATIGUE, 2005, 27 (08) :838-846
[19]  
Navarro A., 2005, P IGF IT GROUP FRACT
[20]  
Navarro A., 2009, AN MECANICA FRACTURA, V26-11, P417