A study on damage behavior of glass by oblique impact of steel ball

摘要

The damage behavior of soda-lime glass was studied by oblique impact test with a steel ball, and in order to investigate the effect of roughness damage on glass, variable damages and strength degradation of smooth and Al2O3 sand blasted for roughness glass was investigated by the ball impact test. After the test, the crack patterns were investigated using a stereo-microscope. In addition, the finite element method was performed to analyze the stress distribution and variation in the glass impacted obliquely by the steel ball. As a result of the impact test, the crack length of 90 degrees impacted glass was the largest and that of 50 degrees impacted glass was the smallest. In particular, as the impact velocity and diameter of the steel ball increased, the difference in crack length was prominent. The finite element analysis showed the maximum principle stresses distribution in the contact area of glass specimen. The result of analysis was accorded with the crack growth behavior by the oblique impact test.