A MULTIAXIAL FATIGUE STRAIN ENERGY DENSITY PARAMETER RELATED TO THE CRITICAL FRACTURE PLANE

1995 ◽  
Vol 18 (1) ◽  
pp. 37-46 ◽  
Author(s):  
G. Glinka ◽  
G. Shen ◽  
A. Plumtree
Keyword(s):  
Energy Density ◽  
Strain Energy Density ◽  
Strain Energy ◽  
Multiaxial Fatigue ◽  
Fracture Plane ◽  
Density Parameter ◽  
Critical Fracture

scholarly journals Crack initiation life in notched Ti-6Al-4V titanium bars under uniaxial and multiaxial fatigue: synthesis based on the averaged strain energy density approach

2017 ◽  
Vol 11 (41) ◽  
pp. 8-15 ◽  
Author(s):  
Giovanni Meneghetti ◽  
Alberto Campagnolo ◽  
Filippo Berto ◽  
Keisuke Tanaka
Keyword(s):  
Energy Density ◽  
Crack Initiation ◽  
Strain Energy Density ◽  
Strain Energy ◽  
Multiaxial Fatigue ◽  
Crack Initiation Life

Strain Energy Approach for Axial and Torsional Fatigue Life Prediction in Aged NiCrMoV Steels

2003 ◽  
Vol 17 (08n09) ◽  
pp. 1665-1670
Author(s):  
Gee Wook Song ◽  
Jung Seob Hyun ◽  
Jeong Soo Ha
Keyword(s):  
Fatigue Life ◽  
Energy Density ◽  
Strain Energy Density ◽  
Strain Energy ◽  
Multiaxial Fatigue ◽  
Density Model ◽  
Total Strain ◽  
Total Strain Energy ◽  
Torsional Fatigue ◽  
Total Strain Energy Density

Axial and torsional low cycle fatigue tests were performed for NiCrMoV steels serviced low-pressure turbine rotor of nuclear power plant. The results were used to evaluate multiaxial fatigue life models including Tresca, von Mises and Brown and Miller's critical plane. The fatigue life predicted by the multiaxial fatigue models didn't correspond with the experimental results in small strain range. We proposed the total strain energy density model to predict torsional fatigue life from axial fatigue data. The total strain energy density model was found to best correlate the experimental data with predictions being within a factor of 2.

Rapid assessment of multiaxial fatigue lifetime in notched components using an averaged strain energy density approach

2019 ◽  
Vol 124 ◽  
pp. 89-98 ◽  
Author(s):  
R. Branco ◽  
P.A. Prates ◽  
J.D. Costa ◽  
L.P. Borrego ◽  
F. Berto ◽  
...  
Keyword(s):  
Energy Density ◽  
Strain Energy Density ◽  
Strain Energy ◽  
Rapid Assessment ◽  
Multiaxial Fatigue ◽  
Fatigue Lifetime ◽  
Notched Components

scholarly journals Local strain energy density to assess the multiaxial fatigue strength of titanium alloys

2016 ◽  
Vol 10 (37) ◽  
pp. 69-79 ◽  
Author(s):  
Filippo Berto ◽  
Alberto Campagnolo ◽  
Torgeir Welo
Keyword(s):  
Fatigue Strength ◽  
Energy Density ◽  
Titanium Alloys ◽  
Strain Energy Density ◽  
Strain Energy ◽  
Local Strain ◽  
Multiaxial Fatigue

Energy Parameter Control System of Strength Machine for Material Tests under Cyclic Bending and Torsion

2013 ◽  
Vol 198 ◽  
pp. 489-494 ◽  
Author(s):  
Leszek Kasprzyczak ◽  
Ewald Macha ◽  
Zbigniew Marciniak
Keyword(s):  
Control System ◽  
Energy Density ◽  
Strain Energy Density ◽  
Strain Energy ◽  
Energy Parameter ◽  
Damage Parameter ◽  
Fatigue Properties ◽  
Density Parameter ◽  
Variable Loading ◽  
Material Tests

The paper presents strength machine control system for characterization of fatigue properties of materials based on a new, recently defined, energy fatigue damage parameter. It is used in new procedure for precise determination of the fatigue characteristics of materials with the controlled strain energy density parameter. The new parameter distinguishes positive and negative values strain energy density histories during variable loading. In case of modern, cyclically unstable materials the new closed-loop control system of strength machine allows to univocally establish the relevant stress-strain based fatigue characteristic under bending and torsion. This control system has been implemented with the use of National Instruments LabVIEW software. The mechatronic stand based on fatigue machine for material testing under bending moment and torsion moment has been described and preliminarily material tests have been done.

scholarly journals Multiaxial fatigue life assessment in notched components based on the effective strain energy density

2020 ◽  
Vol 28 ◽  
pp. 1808-1815
Author(s):  
R. Branco ◽  
J.D. Costa ◽  
L.P. Borrego ◽  
F. Berto ◽  
J. Razavi ◽  
...  
Keyword(s):  
Fatigue Life ◽  
Energy Density ◽  
Strain Energy Density ◽  
Strain Energy ◽  
Effective Strain ◽  
Multiaxial Fatigue ◽  
Life Assessment ◽  
Fatigue Life Assessment ◽  
Notched Components

Damage Criteria Based on Plastic Strain Energy Intensity Under Complicated Stress State

2015 ◽  
Vol 07 (06) ◽  
pp. 1550089 ◽  
Author(s):  
Junping Shi ◽  
Xiaoshan Cao ◽  
Chao Shen
Keyword(s):  
Stress State ◽  
Energy Density ◽  
Plastic Strain ◽  
Strain Energy Density ◽  
Strain Energy ◽  
Energy Intensity ◽  
Yield Condition ◽  
Uniaxial Tensile ◽  
Fracture Plane ◽  
Plastic Strain Energy

In this study, total strain theory and isotropic hardening model based on Mises yield condition are used to derive the expression for plastic strain energy density under complicated stress state. The normal and shear stress distributions of a solid cylindrical bar under a combination of tensile and torsional stresses as well as the equation and integral formula for plastic strain energy density are presented. The plastic strain energy density of critical point and the plastic strain energy intensity on the fracture plane of different materials under several typical stress states are obtained by measuring the fracture data of different materials. With the plastic strain energy intensity as the failure parameter, uniaxial tensile experiments were conducted to measure the final plastic strain energy intensity of the failure section. The plastic strain energy intensity failure criteria of the material under complex stress state are established. Combined tension–torsion tests were conducted on two types of materials, LC9 and LY12, to verify the validity and applicability of the criteria.

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