Multiaxial fatigue behavior of thermoplastics including mean stress and notch effects: Experiments and modeling

2020 ◽  
Vol 136 ◽  
pp. 105571 ◽  
Author(s):  
Mohammad Amjadi ◽  
Ali Fatemi
Keyword(s):  
Fatigue Behavior ◽  
Multiaxial Fatigue ◽  
Mean Stress

scholarly journals Multiaxial fatigue behavior of 2618 aluminum alloy

2019 ◽  
Vol 300 ◽  
pp. 09003
Author(s):  
Benaïssa Malek ◽  
Catherine Mabru ◽  
Michel Chaussumier
Keyword(s):  
Aluminum Alloy ◽  
Fatigue Life ◽  
Internal Pressure ◽  
Fatigue Behavior ◽  
Fatigue Tests ◽  
Multiaxial Fatigue ◽  
Mean Stress ◽  
Research Project ◽  
Pressure Tests

The purpose of the present research project is to study multiaxial fatigue behavior of 2618 alloy. The influence of mean stress on the fatigue behavior under tension and torsion is particularly investigated. Fatigue tests under combined tensile-torsion, in or out of phase, as well as combined tensile-torsion-internal pressure tests have also been conducted. Multiaxial fatigue results are analyzed according to Fatemi-Socie criterion to predict the fatigue life.

Influence of casting defect and SDAS on the multiaxial fatigue behaviour of A356-T6 alloy including mean stress effect

2015 ◽  
Vol 80 ◽  
pp. 90-102 ◽  
Author(s):  
Mohamed Iben Houria ◽  
Yves Nadot ◽  
Raouf Fathallah ◽  
Matthew Roy ◽  
Daan M. Maijer
Keyword(s):  
Fatigue Behaviour ◽  
Multiaxial Fatigue ◽  
Stress Effect ◽  
Mean Stress ◽  
Casting Defect ◽  
Mean Stress Effect

scholarly journals Multiaxial fatigue behavior of additive manufactured Ti-6Al-4V under in-phase stresses

2019 ◽  
Vol 18 ◽  
pp. 914-920 ◽  
Author(s):  
Danilo A. Renzo ◽  
Emanuele Sgambitterra ◽  
Pietro Magarò ◽  
Franco Furgiuele ◽  
Carmine Maletta ◽  
...  
Keyword(s):  
Fatigue Behavior ◽  
Multiaxial Fatigue ◽  
Phase Stresses

Observations on the Interaction of High Mean Stress and Type II Hot Corrosion on the Fatigue Behavior of a Nickel Base Superalloy

1985 ◽  
Vol 107 (1) ◽  
pp. 220-224 ◽  
Author(s):  
J. M. Allen ◽  
G. A. Whitlow
Keyword(s):  
Stress Corrosion ◽  
Maximum Stress ◽  
Rupture Strength ◽  
Fatigue Behavior ◽  
Nickel Base Superalloy ◽  
Chloride Salt ◽  
Mean Stress ◽  
R Ratio ◽  
Nickel Base ◽  
Udimet 720

A study measuring the effects of a molten sulfate/chloride salt on the creep/fatigue behavior of a nickel base turbine blade superalloy, Udimet 720, at 1300°F (704°C) is described. Cyclic stress–cycles to failure (S-N) curves were generated at high mean stress levels, with mean stress, maximum stress, or the ratio of minimum to maximum stress (R ratio) held constant. In salt, it was found that when maximum stress is above the yield, with the cyclic component 20 percent of the maximum, failure occurs by stress corrosion fatigue in orders of magnitude less time than for corresponding loading conditions in air. It is significant, from a failure analysis point of view, that fatigue fracture is intergranular in these circumstances. Similar fatigue behavior may be expected for other nickel base alloys, however, at substantially lower maximum stresses in as much as Udimet 720 exhibits superior short time rupture strength, i.e., resistance to this form of stress corrosion, over the other blade alloys evaluated in this environment.

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