Local Stress-Strain Method for the Effects of Scratch on Fatigue Performances of Cabin Glass
The three-dimensional finite element model of cabin glass with surface scratch is built using the finite element software ANSYS, which is aimed to analyze the detailed stress around the scratch route tip. Then the fatigue notch factor can be gained through utilizing of results from three-dimensional model, which is followed by the estimation of fatigue life based on local stress-strain method. It is found that the stress around scratch route tip is nearly linearly increased with the increasing of tip depth (0.2mm<h<0.8mm) and the fatigue performances of cabin glass with surface scratch are sensitive to scratch depth. Finally, fatigue tests are carried out with the specimens of different scratch route tip depths, and validation against fatigue life by local stress-strain method and experimental data shows a good agreement, which indicates that the scratch model and the local stress-strain method for the effects of scratch on cabin glass fatigue performances are valid.
Jianzhong Wang and Jingang Qi
H. Ding et al., "Local Stress-Strain Method for the Effects of Scratch on Fatigue Performances of Cabin Glass", Advanced Materials Research, Vols. 299-300, pp. 51-56, 2011