Afterwards,the general laws between deformation of cross section of coagulating shell and stress and internal cracks in the continuous casting steel slab are analysed.

A two-dimensional thermo-mechanical coupled finite element model is established to analyze the solidification process of continuous casting slabs in mold and the stress and strain distributions in the solidified shells.

A 3D thermal conduction model is set up, and the shapes as well as temperature distributions of initial solidified shells in moulds for continuous casting of thin slabs are obtained with finite differential method, based on which the stress and strain distributions are given out using 3D thermal elasto plastic contact finite element method.

The temperatures and thichnesses of solidified shells in ISP type mould for continuous casting of thin slabs are analysed,and based on which three dimensional thermal palsto elastic EFM analyses on the shells are carried out,and ,in turn,the distributions of temperatures,stresses and displacements,as well as the longitudinal cracking index (L.

The results show that due to the strong jet impingement on the narrow face in mold,solid shell near the impingement point is very thin.

Measurement of solidified shell thickness for 2# continuous casting slabs of chongqing iron & steel Co.

Furthermore, using the software of secondary cooling simulation in slab casting to simulate the solidification process of AH36 slab, the solid shell shape and the change trend of solid shell thickness, and the temperature distribution on intrados of the slab in the width direction were studied.