Disadvantages Of Fiberglass

Low elastic modulus
The elastic modulus of FRP is twice larger than that of wood, but 10 times smaller than steel (E=2.1×105). Therefore, the rigidity is often insufficient in the product structure and it is easy to deform.
It can be made into a thin shell structure or a sandwich structure, or it can be compensated by high modulus fibers or reinforcements.
Poor long-term temperature resistance
Generally, FRP cannot be used for a long time at high temperatures. The strength of general-purpose polyester FRP drops significantly above 50°C, and is generally only used below 100°C. The strength of general-purpose epoxy FRP drops significantly above 60°C. However, high-temperature-resistant resin can be selected to make long-term working temperatures between 200 and 300°C possible.
Aging phenomenon
Aging is a common defect of plastics, and FRP is no exception. It can easily lead to performance degradation under the action of ultraviolet rays, wind, sand, rain, snow, chemical media, mechanical stress, etc.
Low shear strength
The interlaminar shear strength is borne by the resin, so it is very low. The interlayer adhesion can be improved by selecting processes, using coupling agents, etc. The most important thing is to avoid shearing between layers during product design.