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首页> 外文期刊>SIAM journal on applied dynamical systems >Unified Size-Effect Law for Intact Rock
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Unified Size-Effect Law for Intact Rock

机译：完整岩石的统一大小效应法

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A suite of laboratory testing was performed on Gosford sandstone samples having a range of sizes, including point-load and uniaxial compressive tests. A unified size-effect law (USEL), based on the work by Zdenek Bazant, involving fracture energy as well as fractal theories, was introduced. It was shown that USEL correlates well with the ascending and descending uniaxial compressive strength trends obtained from Gosford sandstone as well as five other rock types reported by Brian Hawkins. Fractal characteristics found to be the primary mechanism for ascending strength trends and surface flaws could be considered as a secondary mechanism. The influence of the contact area on the size-effect behavior of point-load results was investigated using a new approach. This approach was novel in the way it incorporated the load contact area. Determination of the point-load strength index using this new approach led to opposite size-effect trends compared with those observed using a conventional point-load strength index. Hence, the utilization of USEL leads to better simulation of the new point-load strength index data.
机译：在Gosford砂岩样品上进行了一套实验室测试，该砂岩样品具有一系列尺寸，包括点载和单轴压缩测试。介绍了一个统一的大小效应法（USEL），基于Zdenek迷人的工作，涉及围攻能量以及分形理论。结果表明，USEL与来自Gosford砂岩的上升和下降的单轴抗压强度趋势相关，以及Brian Hawkins报道的五种其他岩石类型。发现的分形特征是上升强度趋势和表面缺陷的主要机制可以被认为是次要机制。采用新方法研究了接触面积对载荷结果尺寸效应行为的影响。这种方法是新颖的，它纳入了负载接触区域。与使用传统的点负荷强度指数观察的那些相比，使用这种新方法的测定光度效应趋势导致相反的尺寸效应趋势。因此，USEL的利用导致更好地模拟新的点负荷强度指标数据。

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