The deformation moduli increase with increment of crack friction coefficient and decrease with increment of crack densityparameter.
随着裂隙摩擦系数的增加，变形模量有逐渐增加的趋势。
2
For the deformation of fractured rock mass, crack densityparameter and crack friction coefficient are the most important parameters.
随着裂隙密度参数的增加，变形模量有减小的趋势；随着裂隙摩擦系数的增加，变形模量有逐渐增加的趋势。
3
A 2-d finite element model of tire-rubber was established to simulate the crack growth of the sample under simple tension, by using the strain energy densityparameter.