These criteria not only apply to the materials of unequal tensile strength, but also to the rock material that uniaxial compressive strength is not equal to biaxial compressive strength.

By means of the experimental data from dynamic triaxial stress-strain test of variable cyclic amplitude for frozen soil, the formative conditions of residual strain on frozen silt clay are studied.

Presented is an analysis of the motion transmitting characteristics of constant velocity joint (CVJ) and Cardan joint when the axes of the joints move arbitrarily in the constraint permitted space.