Cement paste creep cross-scale prediction method and system based on stress correlation

By constructing a stress-dependent nonlinear viscoelastic-plastic constitutive model and using finite element analysis, the problem of predicting the creep characteristics of cement-based materials over time scales was solved, enabling rapid and accurate assessment of the macroscopic creep performance of cement paste. This model is applicable to rapid performance assessment and long-term service performance prediction of cement-based materials.

CN121964012BActive Publication Date: 2026-06-19TONGJI UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
TONGJI UNIV
Filing Date
2026-03-27
Publication Date
2026-06-19

AI Technical Summary

⚠Technical Problem

Existing technologies struggle to accurately predict the long-term macroscopic creep properties of cement-based materials in short-term microscopic tests, especially given that the effects of time scale mismatch and stress level differences under different test conditions are not fully considered.

⚗Method used

A nonlinear viscoelastic-plastic constitutive model based on stress correlation is constructed. Through nano-micro indentation experiments and genetic algorithm inversion, combined with finite element analysis, a cross-scale prediction method for micro and macro creep behavior is established. The method considers the variation of viscosity parameters with stress level and achieves a unified characterization of creep characteristic time.

🎯Benefits of technology

Without conducting long-term macro creep tests, short-time nano-micro indentation test data enabled the effective prediction of the macro creep properties of cement paste, shortening the evaluation cycle, improving prediction accuracy and stability, and overcoming the problem of time scale mismatch.

✦ Generated by Eureka AI based on patent content.

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Abstract

This invention provides a method and system for cross-scale prediction of cement paste creep based on stress correlation. By introducing stress-related viscosity parameters, it uniformly describes the creep behavior of cement paste under both microscopic indentation and macroscopic uniform stress scales, and uses short-time microscopic indentation test results to predict the long-term macroscopic creep performance of the material. This method effectively overcomes the problem of mismatch between macroscopic and microscopic creep timescales in existing technologies, revealing the accelerating effect of stress level on creep characteristic time and achieving continuous cross-scale mapping of creep characteristic time. This method has the advantages of clear physical meaning, high computational accuracy, and strong applicability, providing a reliable theoretical basis and computational means for the rapid assessment of creep performance and long-term service performance prediction of cement-based materials.
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