2019_EJRNL_PP_MINGMING_HE_1.pdf
Terbatas  Resti Andriani
» Gedung UPT Perpustakaan
Terbatas  Resti Andriani
» Gedung UPT Perpustakaan
Damage evolution salt rock under fatigue loading at different stress amplitudes, loading frequencies, and loading
rates was investigated in the laboratory. Under conditions of fatigue loading, damage of salt rock can be divided
into three stages: initial damage, constant-velocity damage, and accelerated damage. The results of the fatigue
tests indicate that higher stress amplitudes, higher loading frequency, and higher loading rate lead to decreased
fatigue lifetime. Based on the experiments, a model for the prediction of fatigue life versus stresses, frequency,
and loading rate was proposed. Comparison between the model and the experimental results shows that fatigue
lifetime can be estimated and predicted from this model. Based on the three-stage damage trend, the cumulative
fatigue damage is numerically predicted by considering a double term power damage model. The proposed
model captures the characteristics of damage evolution in salt rock under fatigue loading, with the parameters of
the model obtained from experimental data.