Q: What are the fundamental differences between carbon fiber beams and traditional metal (steel/aluminum) beams?

A: Material Composition:
• Metal is a homogeneous material; carbon fiber is an anisotropic material (its properties depend on the orientation of the fiber layers).
• Weight: Carbon fiber has a density of approximately 1.6 g/cm³, making it about 40% lighter than aluminum and 75% lighter than steel.
• Stiffness: At equivalent weight, carbon fiber typically exhibits higher stiffness than both aluminum and steel.
• Fatigue Resistance: Carbon fiber demonstrates exceptional fatigue resistance, whereas metals are prone to fatigue failure under repeated loading cycles.

Q: How much weight can be saved by using carbon fiber beams?

A: Achieving equivalent stiffness or strength, carbon fiber beams typically reduce weight by 60%-70% compared to steel beams and by 30%-50% compared to aluminum beams. Specific values depend on design optimization.

Q: What is the load-bearing capacity of carbon fiber beams? 

A: Carbon fiber possesses extremely high tensile strength (5-10 times that of steel). However, a beam's load-bearing capacity depends not only on the material but also on the cross-sectional shape (e.g., I-beam, square tube, round tube) and fiber layup design. Properly designed carbon fiber beams can withstand loads of several tons.

Q: What are the primary manufacturing processes? 

A: 

• Pultrusion: Suitable for long beams with constant cross-sections. Offers low cost and high production efficiency, though mechanical properties are slightly lower than compression molding.
• Compression Molding/Winding: Ideal for complex shapes or high-performance requirements. Allows controlled fiber content for superior performance but incurs higher costs.
• Tube winding process: Primarily used for circular or tapered tubes.

Q: Can length and hole positions be customized?

A: Yes.
• Length: Pultruded profiles typically have maximum length limits (e.g., 3-6 meters) and can be cut; molded parts are constrained by tooling.
• Hole positions: Recommended to be pre-embedded by the manufacturer before curing or machined via CNC after curing. Note: On-site drilling requires specialized tools to prevent delamination.

Q: Why are carbon fiber beams significantly more expensive than aluminum beams?

A: Primary reasons:
• Raw material costs: Carbon fiber tow and high-performance resins are substantially pricier than aluminum.
• Manufacturing costs: Extended curing times, high mold expenses, and significant CNC tool wear (carbon fiber abrasive tools).
• Scrap rate: Composite materials are difficult to repair once cured incorrectly.