Xiao Qinxue, Zhu Jingmin, zhang Siping Department of Civil Engineering. NONLINEAR ELASTIC-DAMAGE CONSTITUTIVE EQUATION OF BRITTLE ROCK AND EXPERIMENAAL VERIFICATION[J]. Journal of Civil and Environmental Engineering, 1990, 12(2).
Xiao Qinxue, Zhu Jingmin, zhang Siping Department of Civil Engineering. NONLINEAR ELASTIC-DAMAGE CONSTITUTIVE EQUATION OF BRITTLE ROCK AND EXPERIMENAAL VERIFICATION[J]. Journal of Civil and Environmental Engineering, 1990, 12(2). DOI: 10.11835/j.issn.1674-4764.1990.02.009.
on the basis of the experimental studies of mechanical properties in brittle rock
the generalized elastic modulus
generalized elastic Poisson ratio
irreversible deformation Poisson ratio and damage deformation characteristic arediscussed.And then
a new damage variable is defined.A new nonlinear elastic-damage constitutive equation is built and the damage evolution equation is proposed.The nonlinear elastic-damage constitutive equation is verified in the uniaxialcompression test of quartz sandstone in Chongqing.The results show that reasonableagreement exists between the theoretical analysis and the experimental data.