THE PROGRESSIVE FRACTURE OF LAC DU BONNET GRANITE
THE PROGRESSIVE FRACTURE OF LAC DU BONNET GRANITE
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DOI：
10.1016/0148-9062(94)90005-1
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发表时间：
1994-12-01
期刊：
影响因子：
--
通讯作者：
CHANDLER, NA
中科院分区：
文献类型：
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作者：
MARTIN, CD;CHANDLER, NA
完整岩石的强度由两部分组成：内在强度，或内聚力；还有摩擦强度。通常假定黏聚力和摩擦力在相同的位移下被调动，因此这两个部分可以同时依赖。对Lac du Bonnet花岗岩试样的损伤试验表明，由于摩擦在试样中调动，粘聚力降低。这种内在强度的逐渐损失和摩擦的动员是基于滑动裂纹模型的格里菲斯轨迹建模的。有一个最大的凝聚力呼吁，可依赖于工程目的，这种强度是小于一半的无侧限抗压强度在实验室测量。
The strength of intact rock is made up of two components: the intrinsic strength, or cohesion; and the frictional strength. It is generally assumed that cohesion and friction are mobilized at the same displacements such that both components can be relied on simultaneously. Damage testing of samples of Lac du Bonnet granite has shown that as friction is mobilized in the sample, cohesion is reduced. This progressive loss of intrinsic strength and mobilization of friction is modelled using the Griffith locus based on a sliding-crack model. There appeals to be a maximum cohesion that can be relied on for engineering purposes, and this strength is less than half of the unconfined compressive strength measured in the laboratory.