所属单位：

土木工程学院

发表刊物：

SpringerPlus

关键字：

中文关键字：灰质泥岩；力学特性；试验；本构模型，英文关键字：Lime mudstone；Mechanical property；Test；Constitutiv

摘要：

In order to investigate the mechanical properties of lime mudstone, conventional triaxial compression tests under different confining pressures (0, 5, 15 and 20MPa) are performed on lime mudstone samples. The test results show that, from the overall perspective of variation law, the axial peak stress, axial peak strain and elastic modulus of lime mudstone tend to gradually increase with increasing confining pressure. In the range of tested confining pressure, the variations in axial peak stress and elastic modulus with confining pressure can be described with linear functions; while the variation in axial peak strain with confining pressure can be reflected with a power function. To describe the axial stress–strain behavior in failure process of lime mudstone, a new constitutive model is proposed, with the model characteristics analyzed and the parameter determination method put forward. Compared with Wang’ model, only one parameter n is added to the new model. The comparison of predicted curves from the model and test data indicates that the new model can preferably simulate the strain softening property of lime mudstone and the axial stress–strain response in rock failure process.

备注：

王军保

合写作者：

刘新荣,赵宝云,赖金星

第一作者：

宋战平,王军保

论文类型：

期刊论文

卷号：

卷：5

期号：

期：1

页面范围：

页：1-14

是否译文：

否

发表时间：

2016-09-01