论文部分内容阅读
很早以前人们就注意到,脆性岩石在侧向受压时的拉伸与单向拉伸情况不一样。轴向(σ_1)受拉时,在侧向(即σ_2或σ_3或者二者联合)有压应力的作用(不管压应力的大小如何),则岩石在破坏时的拉应力,必定小于单向拉伸(即无侧向压)时的应力。我们在实验中还发现,抗拉强度与试件的尺寸有关,而且多轴比单轴更明显。试件尺寸越大,抗拉强度越低,当然降低最终会稳定下来。另外,在任何给定尺寸的同种类型试件上进行抗拉试验,有些试验结果与平均值分散较大。上述三个问题,很少有人对其进行详细阐述,而且用连续性的强度理论也不能
Long ago people noticed that the brittle rock in the lateral compression of the tensile and uniaxial tensile conditions are not the same. When axial (σ_1) is pulled, there is compressive stress in the lateral direction (ie, σ_2 or σ_3 or a combination of the two) (regardless of the magnitude of compressive stress), then the tensile stress of the rock in the destruction must be less than that in unidirectional Stretching (ie no lateral pressure) when the stress. We also found in the experiment that the tensile strength is related to the size of the specimen, and the multi-axis is more obvious than the uniaxial. The larger the specimen size, the lower the tensile strength, of course, the reduction will eventually stabilize. In addition, tensile test on the same type of specimen of any given size, some test results and average dispersion. Few of these three questions are elaborated on in detail, nor do they use the theory of intensity of continuity