Canadian Geotechnical Journal, Ahead of Print.
In this study, a hypoplastic model is developed to describe the mechanical behaviors of cemented sand under both monotonic and cyclic loading conditions. A state variable is proposed to qualify the bonding strength, and it is incorporated into the model to reflect the influence of cementation on the strength, stiffness, and dilatancy of sand. To reflect the bonding degradation, this variable evolves during the shearing following a simple evolution rule and may vanish after large deformation. The critical void ratio and friction angle are related to the initial cemented content to consider the variation of the critical state induced by the cementation. The model is subsequently extended to account for cyclic loading by incorporating the intergranular strain, fabric change effect, and semifluidized state. The capability of the model is demonstrated by simulating the behavior of cemented sand under both monotonic and cyclic loading conditions.

中文翻译：

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单调循环荷载下胶结砂的亚塑性模型

加拿大岩土工程杂志，印刷前。
在这项研究中，开发了一个亚塑性模型来描述单调和循环载荷条件下胶结砂的力学行为。提出了一个状态变量来限定粘结强度，并将其纳入模型中以反映胶结对砂的强度、刚度和剪胀性的影响。为了反映粘合退化，该变量在剪切过程中遵循简单的演化规则演化，并在大变形后可能消失。临界孔隙比和摩擦角与初始胶结物含量有关，以考虑胶结引起的临界状态的变化。随后，该模型通过结合晶间应变、织物变化效应和半流化状态进行扩展，以考虑循环载荷。通过模拟胶结砂在单调和循环载荷条件下的行为，证明了该模型的能力。