The volume dilatation and the non-linear deformation of rock originated, when the differential stress equals to the yield point of rock.

当差应力达到岩石的屈服应力时，扩容和非线性应变开始。此外，随应力水平的增加，扩容和非线性变形呈幂函数形式增加。

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The experimental results showed that micro cracks resulted from rock deformation could lead to volume dilatation and non-linear deformation of rock.

实验研究表明，变形导致的岩石微破裂会使岩石产生扩容(体积膨胀)和非线性变形。当差应力达到岩石的屈服应力时，扩容和非线性应变开始。

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Methods A non-invasive high-resolution ultrasound was used to detect the flow-mediated dilatation (FMD) and the change of blood flow volume of reactive hyperaemia in SDH and the control.

方法采用高分辨力超声无创性检测血管内皮依赖性舒张功能的方法比较收缩期和舒张期高血压（SDH）与正常血压组血流介导性舒张（FMD）与反应性充血的血管内皮依赖性舒张功能。

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