Then,using the differential quadrature(DQ) element method,a stiffness equation for analysing the snake buckling of the drillstrins subjected to radial constraints are deduced.

To get the buckling deformation,configuration and restraint forces of tubular strings sealed in packers,the buckling behavior of tubing neared parkers was analyzed in this paper.

By using of the constitutive model developed by the higher-order Cauchy-Born rule and moving least square meshless method,buckling deformation for single walled carbon nanotube (7,7) is investigated in detail.

Finite element analysis of casing buckling in casing drilling;

The casing buckling is analyzed with FEM in casing drilling.

The solution of the cylindrical buckling problems of piezoelectric laminatedprates is presented in the context of the mathematical elastic theory- Due to the complexity of eigen-value problem resulted in, the critical load of buckling must be solved numerically.