5.1 Life prediction for FGH96
The residual cycle life fraction of FGH96 was predicted using the
proposed model. The experimental results and fitting curve are plotted
in Fig 7. The test results of specimen 6 and specimen 7 were used for
fitting to obtain the values of the parameters. The model parametersA and m are 1 and 1.46, respectively. The proposed model
provides an appropriate description of the relationship between the
residual cycle life fraction and the preload cycle life fraction. Fig 8
compares the experimental results and the predicted lives of existing
models11,44,66,67. Here only two-level test results
(specimens 6-9) are included in Fig 8. It is evident that the proposed
model provides an acceptable prediction of the residual life. All
predictions using the proposed model fall into the error band of 2. The
existing models are insufficient to describe the experimental results.
The Peng model overestimates residual life, while other models
underestimate it.