Abstract Numerical simulations of pile installation in sands require advanced constitutive models which are able to predict the mechanical behaviour of soils in a wide range of soil stresses under different loading conditions such as cyclic and monotonic loadings. In this paper, an elasto-plastic constitutive model within a double hardening framework is described which is capable of reproducing the mechanical behaviour of sands in different soil states (stress and relative density) under deviatoric and volumetric loadings. First, the formulation of the model is described and then the capability of the model is shown by simulating laboratory tests data of Karlsruhe sand for various relative densities, stress states and loading conditions.

中文翻译：

---

DeltaSand：沙子的状态相关双硬化弹塑性模型：公式化和验证

摘要 沙土中桩的数值模拟需要先进的本构模型，这些模型能够预测在不同载荷条件（如循环载荷和单调载荷）下各种土壤应力下土壤的力学行为。在本文中，描述了双硬化框架内的弹塑性本构模型，该模型能够再现在偏载和体积载荷下沙子在不同土壤状态（应力和相对密度）下的力学行为。首先描述了模型的制定，然后通过模拟卡尔斯鲁厄砂在各种相对密度、应力状态和加载条件下的实验室测试数据来展示模型的能力。