Method and system for equivalent acceleration and life prediction of composite material in polar region multi-field coupling environment

By constructing the natural environment spectrum and multi-module accelerated test spectrum of the polar multi-field coupling environment, and combining a high-throughput testing platform and loading fixtures, the problems of insufficient simulation of accelerated testing and lifetime prediction of polar composite materials were solved, and efficient, accurate lifetime prediction and rapid evaluation were achieved.

CN121917432APending Publication Date: 2026-04-24OCEAN UNIV OF CHINA
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
OCEAN UNIV OF CHINA
Filing Date
2026-01-21
Publication Date
2026-04-24

AI Technical Summary

Technical Problem

Existing technologies cannot accurately simulate the multi-field coupling effects of composite materials in polar environments, resulting in insufficient simulation capabilities for accelerated testing, a lack of efficient life prediction models, and inefficient traditional evaluation methods, which cannot meet the rapid evaluation needs of composite materials in polar service.

Method used

We constructed a natural environment spectrum for a multi-field coupled polar environment, designed a multi-module accelerated test spectrum, combined a high-throughput testing platform and loading fixtures, defined damage variables by mechanical property retention rate, established a life prediction model for composite materials, and integrated an environmental spectrum construction, multi-field coupled test and data processing system.

Benefits of technology

It achieves highly realistic reconstruction of the damage mechanism of polar composite materials, ensuring the scientific equivalence and predictive reliability of accelerated testing, improving the accuracy of life prediction and evaluation efficiency, and supporting rapid research and development and selection.

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Abstract

The invention belongs to the technical field of composite material durability and reliability evaluation, and discloses a composite material equivalent acceleration and life prediction method and system in a polar region multi-field coupling environment. The natural environment spectrum of the service environment is constructed; key environmental factors are determined based on the environmental spectrum and a damage mechanism, and moisture absorption, freeze thawing, low-temperature freezing and ultraviolet radiation modules are designed and combined to form an accelerated test spectrum; performing a multi-cycle accelerated aging test on the sample according to the spectrum, and synchronously applying a mechanical load; testing the performance after aging by adopting a high-throughput platform to obtain attenuation data; and based on the equivalent relationship between the data and the acceleration spectrum, a life prediction model is established by fitting a residual strength model and calculating an acceleration coefficient, so that life prediction of the composite material in the multi-field coupling environment is realized. The compilation method of the marine environment multi-factor equivalent environment acceleration test spectrum of the composite material is systematically elaborated, and a foundation is laid for research related to life prediction of the composite material in a polar region low-temperature environment.
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