As an advanced composite material in the 21st century, carbon fiber carbon fiber composite material is widely used in aerospace, automobile manufacturing, medical equipment, sports goods and other fields, and is deeply loved by people. During the use of the product, it will inevitably be affected by the surrounding environment such as severe cold, extreme heat, and warmth. Now let me tell you about the performance changes of carbon fiber composite materials in different small tests and humidity environments.

-550c, under humidity and damp heat environment, the individual performance test value of carbon fiber composite material has a large dispersion coefficient, indicating that under abnormal engineering application environment, its performance stability is poor, and temperature has almost no effect on carbon fiber, but it has an impact on the resin matrix and interface Larger; the increase of resin embrittlement at -550c leads to a corresponding increase in modulus. The tensile strength of unidirectional carbon fiber material in the direction of 900 decreases with the rise of the test temperature. In other cases, the tensile strength does not change much, and the compressive strength will vary. The test temperature increases and decreases.

The second law of fick in the initial stage of moisture absorption of carbon fiber composite materials in water, the moisture absorption rate is linearly related to the square root of the moisture absorption time, and the moisture absorption rate of orthogonal laminated carbon fiber composite materials is always higher than that of unidirectional carbon fiber composite materials. Its mechanical properties decrease in hot and humid environment, especially the decrease of interlaminar shear strength. After immersing in 70+-50 water for 336h, it is known that the interlaminar shear strength retention rate of unidirectional and laminated carbon fiber composite materials is 700c. They are 74.30% and 57.20% respectively.

Generally speaking, in harsh environments, carbon fiber composite materials can still better maintain the human and Buddha characteristics.