【摘要】 假设经化学腐蚀的岩石受荷后微元的破坏服从Weibull分布,结合损伤力学理论,考虑化学腐蚀与荷载耦合作用和压密作用,建立相应的分段单轴损伤本构模型,模拟分析化学腐蚀对砂板岩应力应变关系的影响,且用不同浸泡时间后砂板岩单轴压缩试验结果进行验证。结果表明,模拟结果与试验结果较为吻合,该本构模型能够较好反映化学腐蚀作用下砂板岩峰前应力应变关系,具有合理性和可行性。更多还原

【Abstract】 It was assumed that the micro element failure of rock considering chemical corrosion obeyed the Weibull distribution after loading. Combined with the damage mechanics theory, considering the coupling effect of chemical corrosion and load and compaction, the corresponding segmental uniaxial damage constitutive model was established. The influence of chemical corrosion interaction on the stress-strain relationship of sandy slate was simulated and analyzed, and the uniaxial compression test results of sandy slate after different soaking time were used to verify. The results show that the simulation results are in good agreement with the experimental results, and the constitutive model can well reflect the prepeak stress-strain relationship of sandy slate under chemical corrosion, which is reasonableness and feasibility.更多还原