scholarly journals The effect of mean stress and stress biaxiality in high-cycle fatigue

2017 ◽  
Vol 41 (2) ◽  
pp. 440-455 ◽  
Author(s):  
Imade Koutiri ◽  
Daniel Bellett ◽  
Franck Morel
Keyword(s):  
High Cycle Fatigue ◽  
Mean Stress ◽  
Cycle Fatigue

Safety Factor in Fatigue Under Fluctuating Stresses

1987 ◽  
Vol 109 (4) ◽  
pp. 397-401 ◽  
Author(s):  
V. A. Avakov
Keyword(s):  
Safety Factor ◽  
High Cycle Fatigue ◽  
Stress Amplitude ◽  
Static Strength ◽  
Mean Stress ◽  
Cycle Fatigue ◽  
Safety Factors ◽  
Generalize Expression ◽  
Allowable Stresses ◽  
Number Of Cycles

It is common to assume identical allowable safety factors in static strength [m], defined by mean stress (Sm), and in fatigue [a], defined by stress amplitude (Sa), in order to find the full safety factor (F) under asymmetrical cycles, or to plot any type of the Sm–Sa diagram of allowable stresses. Here additional modification is considered to generalize expression of the full factor of safety in fatigue under asymmetrical stresses, utilizing unequal allowable safety factors in static strength (by mean stress) and in fatigue (by stress amplitude): ([a] ≠ [m]). We assume that loading is stationary, and cumulated number of cycles is large enough to consider high cycle fatigue.

scholarly journals Mean stress effect under Multi-Axial High Cycle Fatigue loading for cast A356-T6 alloy

2014 ◽  
Vol 12 ◽  
pp. 04025
Author(s):  
M. Iben Houria ◽  
Y. Nadot ◽  
R. Fathallah ◽  
M.J. Roy ◽  
D.M. Maijer
Keyword(s):  
High Cycle Fatigue ◽  
Fatigue Loading ◽  
Stress Effect ◽  
Mean Stress ◽  
Cycle Fatigue ◽  
Mean Stress Effect

scholarly journals The influence of tension mean stress to the crack initiation process at the very high cycle fatigue regime for a high strength steel

2018 ◽  
Vol 165 ◽  
pp. 20001
Author(s):  
Thomas Rohm ◽  
Karl-Heinz Lang ◽  
Marcus Korn
Keyword(s):  
Crack Initiation ◽  
High Strength Steel ◽  
High Cycle Fatigue ◽  
High Strength ◽  
Mean Stress ◽  
Cycle Fatigue ◽  
Very High Cycle Fatigue ◽  
Initiation Process ◽  
Incremental Step ◽  
Very High

Strain controlled tests were performed on a high strength steel to investigate the influence of tension mean stress to the crack initiation process at the very high cycle fatigue regime. It is supposed that the variation of stress the state in the vicinity of a non-metallic inclusion results in a change to the energy transferred to the surrounding metallic matrix. To prove this, incremental step tests on cylindrical specimen were realized in which the tension mean stress was stepwise increased. It could be verified that the hysteresis area, which is a criterion of the work transferred to the specimen, decreases with increasing tension mean stress. The test results provide a reasonable physical model to estimate the influence of tension mean stress to the crack initiation process in the very high cycle fatigue regime.

Effect of stress ratio and mean stress on high cycle fatigue behavior of the superalloy IN718 at elevated temperatures

2019 ◽  
Vol 6 (9) ◽  
pp. 0965a6 ◽  
Author(s):  
Dhananjay Pradhan ◽  
G S Mahobia ◽  
K Chattopadhyay ◽  
D C Fernando ◽  
N Paulose ◽  
...  
Keyword(s):  
Stress Ratio ◽  
High Cycle Fatigue ◽  
Elevated Temperatures ◽  
Fatigue Behavior ◽  
Mean Stress ◽  
Cycle Fatigue
Sign in / Sign up

Export Citation Format

Share Document