Fatigue damage evaluation of a high pressure tube steel using cyclic strain energy density

Effects of strain rate and mean strain on cyclic behavior of aluminum alloys under isothermal and thermo-mechanical fatigue loadings

“…However, tensile mean strain for the composite caused tensile mean stresses and reduced the fatigue life. In another paper, Koh [6] evaluated the fatigue damage of a high pressure tube steel under different strain ratios. No significant difference in the fatigue life was observed in low cycle fatigue regime due to the mean stress relaxation by cyclic plasticity.…”

Fatigue behavior of an austenitic steel of 300-series under non-zero mean loading

“…Several researchers used energy based models considering mean stress effect to predict the fatigue life [1,13,22]. Therefore, an attempt is made to analyze the fatigue data of asreceived material using strain energy density parameter.…”

“…(9) presents the SWT damage parameter [4] when a σ is replaced by max σ with the definition of max a m σ σ σ = + based on the assumption that for different strain amplitude, a ε , and mean stress, m σ , the product max a σ ε remains constant for a given life and can handle the zero or non-zero mean strain loading simultaneously. This SWT parameter, the stress-strain parameter max a σ ε , is one of the most popular procedures and has been found successful on low and high cycle fatigue responses of several materials [4,9,11,[22][23][24][25].…”

A new energy-based fatigue damage parameter in life prediction of high-temperature structural materials

“…Therefore, it is thought that PSED is a better damage parameter rather than plastic strain range for drastic hardening or softening conditions. A number of studies to establish the fatigue criteria based on PSED have been attempted [15][16][17][18][19][20][21][22][23][24][25][26][27]. Morrow and Halfold [15][16][17] showed the total plastic energy required for fatigue failure is not a constant but increases with a decrease in stress amplitude, and that the total energy is related to the stress or plastic strain amplitude via the cyclic stress-strain behavior.…”

“…Morrow and Halfold [15][16][17] showed the total plastic energy required for fatigue failure is not a constant but increases with a decrease in stress amplitude, and that the total energy is related to the stress or plastic strain amplitude via the cyclic stress-strain behavior. Koh [18] has found the fatigue damage of high pressure tube steel can be evaluated by using the parameter based on the cyclic strain energy density. It was also found that the plastic strain energy density did not properly account for the mean stress effect on the low-cycle fatigue life of the tube steel.…”