Vibration Analysis of a Postbuckled Microscale FG Beam Based on Modified Couple Stress Theory

Table 1

Critical buckling loads (roots of characteristic equations) for different boundary conditions.

Boundary conditions	𝛾^2/𝜋^2
Clamped-clamped	4, 8.08, 16
Clamped-simply supported	2.05, 6.05, 12.05
Simply supported-simply supported	1, 4, 9