Project supported by the National Postdoctoral Science Foundation of China (No.20060400317);the Education Foundation of Zhejiang Province (No.20061459);the Young Foundation of Zhejiang Province (No.0202303005),China
An expansion theory of spherical cavities in strain-softening materials with different moduli of tension and com-pression was presented. For geomaterials,two controlling parameters were introduced to take into account...