1. Which one is stronger in building reinforcement, carbon fiber plate or steel plate?
Answer: The tensile strength of carbon fiber plate is significantly higher than that of steel plate. Its design value can reach 2000-3000MPa (such as T300 grade and above), which is 7-10 times that of ordinary steel (about 200-400MPa). For example, the tensile performance of 0.1mm thick carbon fiber plate ≈ 1mm thick steel plate greatly improves the reinforcement efficiency and reduces the structural load.
2. Where is the lightweight advantage of carbon fiber plate?
Answer: The density of carbon fiber is only 1.6-1.7g/cm³, which is about 1/4 of steel and 2/3 of aluminum alloy. In building reinforcement, it will not increase the dead weight of the structure; in the field of drones, it can reduce the weight of the fuselage by 25%-30% and extend the flight time.
3. How much stronger is the corrosion resistance than metal materials?
Answer: Carbon fiber is an inert material, resistant to acid, alkali, and salt corrosion, and does not rust. Steel plates require regular anti-rust treatment, and aluminum alloys may oxidize in humid environments. Carbon fiber can last for more than 50 years in corrosive environments such as chemical plants and coastal bridges.
4. Is the construction efficiency better than traditional reinforcement materials?
Answer: Carbon fiber panels are easy to construct: No large equipment is required, and they can be operated manually; The construction period is only 2/5 of that of steel reinforcement, saving labor costs; It can be cut into complex shapes and fit curved components (such as tunnels and chimneys), with an effective bonding rate of over 90%, while steel plates are only 70%.
5. What are the advantages in fatigue resistance and earthquake resistance?
Answer: The fatigue strength of carbon fiber is more than 10 times that of steel, and it is not easy to crack under repeated loads. When reinforcing concrete beams, it can delay the yielding of steel bars, optimize the failure mode (from brittleness to ductility), and improve the seismic resistance of the structure.
6. Compared with aluminum alloy, how is the high temperature performance?
Answer: The thermal expansion coefficient of carbon fiber plate is almost 0, and it does not deform under temperature difference, which is suitable for precision structures (such as drone parts); while aluminum alloy has obvious thermal expansion and contraction. However, the upper limit of high temperature resistance of aluminum alloy (500℃) is higher, and carbon fiber plate (epoxy resin base) is usually resistant to below 150℃.
7. Why is carbon fiber rather than aluminum alloy generally used in drone fuselages?
Answer: In addition to lightweight, carbon fiber also has:
High stiffness: reduce flight vibration and improve stability;
One-piece molding: can manufacture streamlined complex structures and optimize aerodynamic performance;
Anti-electromagnetic interference: protect electronic equipment.