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.

The principle of rod buckling and the eccentric wearing status of rod were analyzed.

Based on the model,the column squirm features is analyzed,and the buckling mode and buckling critical loading is obtained.

Using the knowledge of solid mechanics, hydrodynamics, and mathematics and so on and based on the works of the predecessors and the new research results, this thesis establishes the mathematics models for the power consuming of unload, cutting rock power and the buckling of drill string.

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.