GB/T 41767-2022 in English

Analysis of the core points of the standard

This document establishes a mass change capture model for polymer-based composite materials under the control of environmental temperature and humidity, and realizes the coordinated control of the electric blast drying oven and the constant temperature and humidity chamber through a precision balance and a moisture detector.

Comparison of technical indicators of test equipment

Key requirements for sample preparation

• Water-lubricated grinding wheel cutting machine is used for processing and forming, and the cutting surface is freely exposed
• Standard size of special metallographic specimens: 100×100mm square
• Different fiber volume fractions require separate preparation of accompanying samples

Analysis of diffusion coefficient calculation algorithm

According to the formula D_z=πh²(ΔM)/(16M_m²Δt), the Δt interval of the initial hygroscopic zone is processed by segmented linear regression of the data, which is valid when the correlation coefficient R²≥0.98.

Project implementation proposal

Technology innovation development path

Combined with ISO12571:2013 international comparison, this specification introduces dynamic variable step control algorithm for the first time to optimize data collection frequency, and the detection efficiency is improved by more than 40% compared with traditional methods.