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首页> 外文期刊>International journal of geotechnical engineering >Vipulanandan failure models to predict the tensile strength, compressive modulus, fracture toughness and ultimate shear strength of calcium rocks
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Vipulanandan failure models to predict the tensile strength, compressive modulus, fracture toughness and ultimate shear strength of calcium rocks

机译：Vipulanandan失效模型预测钙岩的拉伸强度，压缩模量，断裂韧性和最终剪切强度

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In this study, over 1000 data from the literature were used to characterize and compare the density, strengths, modulus, fracture toughness, porosity and the ultimate shear strengths of the calcium rocks.The ranges of the densities for gypsum rock (CaSO_4 2H_2O) and limestone rock (CaCO_3) were 2.10 to 2.83 and 1.70 to 2.75 gm/cm~3, respectively. The compressive and tensile strengths of the gypsum and limestone rocks varied from 2 to 250 MPa and 1.8 to 25 MPa, respectively. The compressive modulus and Mode-1 fracture toughness of the gypsum and limestone rocks varied from 0.7 to 70 GPa, and from 0.03 to 2 MPa.m~(0.5), respectively. Vipulanandan correlation model was effective in relating the modulus of elasticity, fracture toughness with the relevant strengths of the rocks. A new non-linear Vipulanandan failure criterion was developed to not only better quantify the tensile strength, pure shear (cohesion) strength and to predict the maximum shear strength limit with applied normal stress on the gypsum and limestone rocks. The prediction of the failure models for the two rock types was also compared to the Mohr-Coulomb failure model. The Vipulanandan failure model predicts the maximum shear strength limit was, as the Mohr-Coulomb failure model does not have a limit on the maximum shear strength. With the Vipulanandan failure model based on the available data, the maximum shear strengths predicted for the gypsum and limestone rocks were 64 and 114 MPa, respectively.
机译：在这项研究中，来自文献中的超过1000个数据用于表征和比较钙岩的密度，强度，模量，断裂韧性，孔隙率和最终剪切强度。石膏岩石的密度范围（Caso_4 2H_2O）和石灰石岩石（Caco_3）分别为2.10至2.83和1.70至2.75 gm / cm〜3。石膏和石灰石岩石的压缩和拉伸强度分别从2至250MPa和1.8至25MPa变化。石膏和石灰石岩体的压缩模量和模式-1裂缝韧性从0.7〜70gPa变化，分别为0.03至2MPa.m〜（0.5）。 vipulanandan相关模型在与岩石相关强度相关的弹性模量，裂缝韧性有效。开发了一种新的非线性vipulanandan失效标准，不仅可以更好地量化拉伸强度，纯剪切（内聚力）强度，并预测施用正常胁迫的最大剪切强度限制和石灰石岩石。与MoHR-Coulomb失败模型相比，还将两种岩石类型的故障模型预测。 vipulanandan失效模型预测最大剪切强度限制，因为Mohr-coulomb失败模型没有限制最大剪切强度。利用基于可用数据的vipulanandan失败模型，石膏和石灰石岩石预测的最大剪切强度分别为64和114MPa。

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