The crack distance and crack density were the n calculated while taking the residual thermal effect into account, with the res ults fitting perfectly with the existing experimental values.

Using the finite sublayer shearlag model, this paper studies the multiple cracks of transverse matrix in crossply laminates under uniaxial tension, derives the relationship between the transverse crack density and applied stress, and obtains the results which are relatively close to the existing test values.

Because the formulas are expressed as a function ofcrack density,the relation between crack density and stresses in the damage zone is constructed so as to predict the stiffness degrada- tion directly from the stress distribution in damage zone.

A new method for determining fracture density;

Inverting reservoir fracture density using P-wave AVO data;

The relationships between the crack items and the applied load as well as the number of carbon fiber sheets are then obtained,where the crack items include the crack density and the maximum crack width in the reinforcement cover under the pure bending part of the beam.

The effect of crack density and structure on the propagation of seismic shear wave is studied through laboratory experiments with instillation controlled crack densities.

Fractal dimension of core fractures in Chengbei 30 buriedhill reservoir and its relation to fracture density.;

The fracture density model for pelite reservoirs basedon the regression analysis of variable parameters;

Analysis on the impact of dip on fracture density inversion