Abstract
When a glass bead put between parallel two plates is compressed, the contact area internal stress increases. In such a case, the stress state was simulated by the Finite Element Method, and the fracture condition was applied. As a result, the tensile stress occurred in the direction rectangular to the compressive stress in the inner part. The glass bead was fractured in the central section parallel to the compressive direction. Also it was shown that the tensile strength of the glass bead is represented by the following equation:
σt=1.1Pc/A
where, Pc is the fracture load, and A is the cross-sectional area of the glass bead.
