Simple shear behavior of sand is representative in geotechnical engineering with potential failure occurred along a thin shear zone. The strength and deformation of sand under simple shear are accompanied with principal stress rotation (PSR). This study proposes a modified SANISAND‐F model to capture the simple shear behavior of sand with PSR. A new plastic flow rule along with a kinematic hardening modulus is proposed to consider the evolution of the PSR and intermediate stress ratio. The developed model, with thirteen parameters, can reasonably the capture the stress‐strain and PSR of sand under simple shear.

中文翻译：

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简单剪切路径的改进 SANISAND-F 模型

砂的简单剪切行为在岩土工程中具有代表性，沿着薄剪切带可能发生破坏。简单剪切作用下砂的强度和变形伴随着主应力旋转（PSR）。本研究提出了一种改进的 SANISAND-F 模型，用于通过 PSR 捕获沙子的简单剪切行为。提出了一种新的塑性流动规则以及运动硬化模量来考虑 PSR 和中间应力比的演变。所开发的模型具有十三个参数，可以合理地捕获简单剪切下砂的应力应变和PSR。