Ultraviolet aging test of glass fiber reinforced composite

Abstract: 璃纤维增强复合材料在实际使用中可能会受到紫外光的破坏，因此进行紫外光老化试验对于评估其耐久性尤为重要。与氙弧灯老化试验不同，紫外光老化试验利用荧光紫外光灯模拟太阳光的破坏性，能够更准确地模拟实际室外环境中的紫外光影响。这种试验通过模拟室外潮湿环境，利用冷凝循环系统再现真实的湿润条件，增强试验的真实性。冷凝过程在高温下进行，能有效加速材料的老化速度。简而言之，紫外光老化试验为璃纤维增强复合材料的耐久性评估提供了可靠的手段，对材料的设计和应用具有重要意义。

The glass fiber reinforced composite may be damaged by ultraviolet light in actual use, so the ultraviolet light aging test has become an important means to evaluate its durability. Unlike the Xenon-arc lamp aging test, the ultraviolet light aging test simulates the Destructiveness of sunlight on the material through fluorescent ultraviolet light lamps, which has some unique advantages.

1. Characteristics of fluorescent ultraviolet lamps

Fluorescent UV lamps are similar in electrical principle to ordinary cold lamps for lighting, but can generate more ultraviolet light than visible or infrared rays of light. Different types of fluorescent UV Lamps can simulate different light spectrum ranges in the solar Light spectrum, so that the test can better match the actual outdoor environment. The application of irradiance Control system makes the test results have high accuracy and reproducibility.

Ultraviolet aging test of glass fiber reinforced composite Figure 1

2. Effective means to simulate humid environment

One of the main advantages of the UV aging test is the ability to simulate the damage of the material in a more realistic outdoor humid environment. Through a special condensation principle, the test can simulate the outdoor humid condensation form, enhancing the authenticity of the test. During the condensation cycle, the heating of the Water Tank at the bottom of the Test Chamber generates steam, keeping the Test Chamber environment at 100% relative humidity at high temperatures. The condensation cycle system used in the test can continuously simulate outdoor humid, in which the water is stable and pure, which improves the reproducibility of the test results.

3. The importance of long-term condensation processes

Since the material is generally exposed to moisture outdoors for a long time, a typical circulating condensation system requires at least 4 hours of test time. The condensation process is carried out under heating conditions, which can greatly accelerate the damage of moisture to the material. This test method is more effective than the method of Miscellaneous Humidity environment to reproduce the damage phenomenon of humid environment to the material.

Overall, the glass fiber reinforced composite UV aging test provides a reliable and realistic means for researchers to evaluate the durability of materials by simulating the actual humid environment, providing strong support for the design and use of materials.