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Język Polski
Statyczne upłynnienie jako forma niestabilności materiału w symulacjach testów elementowych gruntu niespoistego
DOI:
https://doi.org/10.24425/ace.2024.149865Abstrakt
Statyczne upłynnienie jest formą niestabilnego zachowania się gruntu niespoistego. Najczęściej występuje w nasyconych piaskach luźnych w warunkach bez odpływu wody obciążonych monotonicznie. Możliwe jest prognozowanie statycznego upłynnienia przy użyciu sprężysto-plastycznego modelu, w którym uwzględnia się niestowarzyszone prawo płynięcia plastycznego i wzmocnienie odkształceniowe. W pracy przedstawiono krótki opis niestabilnego zachowania się piasku nasyconego w warunkach bez odpływu pod obciążeniem monotonicznym. Zaprezentowano prosty model sprężysto-plastyczny ze wzmocnieniem dewiatorowym i powierzchnią obciążenia Druckera-Pragera. Związki konstytutywne zaprogramowane zostały w skrypcie Python. Symulacje testów trójosiowego ściskania i rozciągania i mieszanej kontroli naprężeniowo-odkształceniowej pokazały zdolność modelu do prognozy różnych reakcji piasku w warunkach bez odpływu, w tym braku upłynnienia, częściowego i pełnego upłynnienia.Bibliografia
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