Method for evaluating the life of a compressed brittle solid material after high-temperature heating

By using fracture damage mechanics theory and various experimental methods, a life evaluation method for brittle solid materials after high-temperature heating was established, which solves the shortcomings of existing life evaluation technologies, realizes reliable prediction of materials under compressive loads, and ensures the safety of engineering structures.

CN121453520BActive Publication Date: 2026-07-07BEIJING UNIV OF CIVIL ENG & ARCHITECTURE
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
BEIJING UNIV OF CIVIL ENG & ARCHITECTURE
Filing Date
2025-11-06
Publication Date
2026-07-07

AI Technical Summary

Technical Problem

Existing technologies are insufficient to effectively evaluate the lifespan of brittle solid materials under compressive loads after high-temperature heating, making it difficult to assess the safety hazards of engineering structures after a fire.

Method used

Using fracture damage mechanics theory, the performance parameters of brittle solid materials after high-temperature heating are measured through various experimental methods. The relationship equation between strain and time is established. Combined with CT scans and various experimental instruments, the evolution law of internal crack length is derived, and the material life is evaluated.

Benefits of technology

A reliable life assessment method is provided, which can predict the final failure time of brittle solid materials under compressive load after high-temperature heating, and ensure the safety assessment of engineering structures after fire.

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Abstract

The application discloses a kind of high-temperature heated compression brittle solid material life evaluation method, for high-temperature heated compression brittle solid material, first process four categories specific size samples, by triaxial compression, compression rheology, CT scanning and other kinds of tests, measure compressive strength, strain-time curve and initial damage key parameters, based on fracture damage mechanics, the deformation time evolution equation containing temperature, stress and other parameters is used for life evaluation, the application is based on fracture mechanics theory, verify that the trend of theoretical curve and test curve is similar and numerical comparable, ensure that life evaluation result is reliable.
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