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Numerical and Phenomenological Study of Desiccation of Soil

机译:土壤干燥的数值与现象学研究

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摘要

Desiccation cracks are assumed to be the consequence of an excess of tensile stresses induced by shrinkage of the drying body with a constrained kinematics. Free and constrained desiccation shrinking tests on silt samples are compared and simulated using linear hygro-elasticity. The results reveal diverse patterns of stress depending on the external constraints and presence of moisture gradient. The linear hygro-elasticity captures well the drying process before the appearance of the cracks. For the tested material, the tensile axial stress at the first crack (w = 24%) was estimated at about 3.7 kPa.
机译:干燥裂纹被认为是由于运动受约束的干燥体收缩而引起的过大拉伸应力的结果。使用线性湿弹性来比较和模拟淤泥样品上的自由约束干缩试验。结果揭示了取决于外部约束和水分梯度存在的不同应力模式。线性湿弹性很好地捕捉了裂纹出现之前的干燥过程。对于被测材料,第一裂纹处的轴向拉伸应力(w = 24%)估计约为3.7 kPa。

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