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Parameter determination for nonlinear stress criteria using a simple regression tool

机译:使用简单的回归工具确定非线性应力准则的参数

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摘要

In geotechnique, laboratory test results are often employed to estimate the parameter values required for the application of criteria commonly used to define specific stress states such as yielding, failure, and residual strength. Many of these criteria rely on a nonlinear formulation relating the different stress tensor components (or the corresponding invariants). There are many regression techniques that can be selected to obtain corresponding parameters based on experimental results. Some of these can be fairly complex but, considering the intrinsic variability of the available data on geomaterials, relatively simple methods are usually deemed sufficient. In that regard, one should favor methods directly available from common software packages. In this paper, the authors present a simple analysis procedure based on Microsoft Excel (R) which can be applied to different two- and three-dimensional stress criteria. As an example, the technique is applied to the failure strength of rock samples using two nonlinear criteria. [References: 32]
机译:在岩土技术中,通常使用实验室测试结果来估计应用通常用于定义特定应力状态(例如屈服,破坏和残余强度)的标准所需的参数值。这些标准中的许多标准都依赖于将不同应力张量分量(或相应的不变量)联系起来的非线性公式。根据实验结果,可以选择许多回归技术来获得相应的参数。其中一些可能相当复杂,但是考虑到地球材料的可用数据的内在变异性,通常认为相对简单的方法就足够了。在这方面,应该支持直接从通用软件包中获得的方法。在本文中,作者提出了一种基于Microsoft Excel(R)的简单分析程序,该程序可应用于不同的二维和三维应力准则。例如,该技术使用两个非线性准则应用于岩石样品的破坏强度。 [参考:32]

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