Frontiers in Earth Science, Год журнала: 2024, Номер 12

Опубликована: Ноя. 29, 2024

The investigation into the complex mechanical properties of frozen calcareous clay under multi-factor interaction holds significant importance for reliability and durability engineering in cold regions. This study investigates strength different levels by designing a four-factor, four-level orthogonal test that incorporates temperature, confining pressure, dry density, water content. aimed to assess sensitivity each factor failure stress, establish an intrinsic model based on Duncan-Chang considering results indicated stress-strain curves exhibit strain-hardening characteristics across various levels. These can be divided elastic elastic-plastic phases, with slope phase stress value at inflection point increasing decreasing temperature pressure. When pressure is maintained constant, negatively correlated temperature. positively Sensitivity analysis shows influence as follows: > density Additionally, markedly greater than content density. evolution unfrozen follows three stages: sharp reduction, rapid slow reduction. Verification against experimental data confirmed modified constitutive effectively reflects relationship multiple factors.

Язык: Английский