In the variational equation of unstable potential energies, the potential energies of external forces by using additional moments of flexure and moments of torsion and their correspondent curvatures of unstable displacement and increment of torsional angle are represented.

In the variation equation of unstable potential energies,the potential energies of external forces by using additional moments of flexure and moments of torsion and their correspondent curvatures of unstable dispacements and increment of torsion angle are represented.

Study on catastrophic theory model of instability of coal pillar and roof system;

Study of the Hole Wall Instability for Method of Drilling Bits;

Discussion on the application of boundary theory in determination of instability of mined-out area and damage control;

Analysis of buckling during sheet′s springback;

Study on the method of evaluating fatigue and buckling in traversing pipeline;

General buckling and test analysis of composite stiffened cylindrical panel;

Study on the Unstability Stretching of Stainless Steel Sheet;

In allusion to penetrative cranny distributing characteristics of underground rock-mass, the effect laws of the penetrative cranny distribution on underground roadway unstability were analyzed, and the correctness to the theoretical analysis by example calculation of roadway observation data in Wuyang coalmine of Lu'an mining district was proved.

The article describes molten urea unstability from the outlet pipe by checkink the abnormal urea production.

Finite Element Analysis of the Vault Destabilization of a Residuum Oil Tank;

Stress and strain state of tube hydroforming and it's influence on destabilization;

The estimation of the plastic deformation destabilization area and the lateral pressure in large H-section straightening;