As a strategic advanced composite material, carbon fiber is widely used in aerospace, high-end automobiles, rail transit, medical devices, sports equipment and other fields due to its excellent performance. Its core advantages are as follows:
High Strength and High Modulus: Taking T700 and T800 grades as examples, the tensile strength reaches 3500-7000 MPa, and the elastic modulus is 230-600 GPa, far exceeding that of ordinary steel (tensile strength 400-600 MPa) and aluminum alloy (300-500 MPa).
Low Density and Lightweight: With a density of 1.75-1.80 g/cm³, it is only 1/4 of steel and 2/3 of aluminum. According to the Energy-Saving and New Energy Vehicle Technology Roadmap 2.0, a 10% weight reduction of the new energy vehicle body can increase the cruising range by 6%-8%.
Excellent Corrosion Resistance and Fatigue Performance: It does not rust, is resistant to acids and alkalis, has good fatigue resistance under alternating loads, and features a long service life.
Low Expansion and High Stability: It has small deformation under temperature changes, making it suitable for precision instruments and high-temperature working conditions.
Despite its outstanding performance, carbon fiber needs customized development to be transformed into high-performance products that meet specific needs.
The Inevitability of Customization for Carbon Fiber Products
Carbon fiber has excellent intrinsic properties, but the final product performance is highly dependent on the matching degree of structural design, molding process and application scenarios. Standardized products are difficult to meet the diversified market demands:
Complex Structural Requirements: UAV arms, automotive components, medical rehabilitation braces and other products often require asymmetric, special-shaped or integrated design.
Functional Integration Requirements: It is necessary to balance multiple functions such as electrical conductivity, high-temperature resistance, electromagnetic shielding and aesthetic appearance.
Pursuit of Extreme Lightweight: Different applications have high requirements for weight control accuracy, which requires topological optimization and layup design to maximize performance.
Customization is the core path for the industrialization of carbon fiber products, but it also brings new challenges — how to scientifically judge the actual performance of customized products?
Four Core Elements for Performance Evaluation of Custom Carbon Fiber Products
In customized production, raw materials are the foundation, but the key control points in the manufacturing process truly determine product performance. Specifically, there are four core elements:
1. Mold Precision and Surface Treatment
The mold is the "matrix" for product molding. Its precision directly affects dimensional tolerance, surface finish and structural integrity. Insufficient precision will lead to fiber wrinkles, resin enrichment or increased porosity, reducing mechanical properties.
High-precision molds require CNC precision machining, with dimensional error controlled within ±0.1mm to ensure batch consistency. Surface treatment such as mirror polishing or Teflon coating is also needed to ensure smooth demolding, reduce defects such as pitting and scratches, and make the yield rate of Class A appearance exceed 95%.
2. Production Process Experience and Parameter Control
The molding of carbon fiber products involves processes such as prepreg lamination, vacuum bagging and autoclave curing, which require precise control of parameters such as temperature, pressure and time. A 10% deviation in parameters may lead to a more than 20% decrease in interlaminar shear strength. Taking the autoclave process as an example, the typical curing curve is a heating rate of 2-3℃/min, a holding pressure of 0.6-0.8MPa, a curing temperature of 120-180℃, and a holding time of 2-4 hours.
Mature production experience is crucial. Viasen New Materials has been deeply engaged in the production of carbon fiber products for more than ten years. After thousands of process verifications, it has established a "process database", stably controlling the product porosity below 1%, meeting aerospace-grade standards.
3. Fiber Layup Design and Simulation Analysis
The performance upper limit of customized products is determined by the layup scheme. A reasonable layup angle (0°/±45°/90°) and sequence can optimize the load transfer path. Incorrect design is likely to cause local stress concentration and premature failure.
It is necessary to conduct simulation analysis according to the specific conditions of the product, predict the stress distribution and optimize the layup ratio through finite element analysis (FEA). For example, the carbon fiber roller produced by Viasen New Materials has a 18% increase in stiffness and a 12% reduction in weight after simulation optimization.
4. Post-Processing Technology
Improper operations in post-molding processes such as cutting, drilling and grinding are likely to cause delamination, burrs and other problems. Products without professional post-processing may have a 30%-50% reduction in fatigue life.
During CNC machining, due to the high strength of carbon fiber, diamond tools must be used to control the edge roughness Ra<3.2μm, avoiding cutting delamination and burrs. For deep-processed products, ultrasonic C-scanning or X-ray inspection should be used to detect internal defects with a detection rate of over 98%, ensuring no hidden cracks or air holes.
The performance of custom carbon fiber products is the result of the synergy of mold precision, production experience, layup design and post-processing capabilities. Only by striving for excellence in all links can the "theoretical performance" of carbon fiber be transformed into "practical performance".
Against this background, enterprises with more than ten years of experience in the industry have more competitive advantages. As a leading domestic provider of customized carbon fiber solutions, Viasen New Materials Technology Co., Ltd. has focused on the R&D and manufacturing of high-performance carbon fiber products since its establishment in 2014. It has served more than 800 customers, covering UAVs, new energy vehicles, high-end sports equipment and other fields.
Relying on the independently designed high-precision mold system, it ensures precise product dimensions and high-quality appearance. With a mature autoclave process database, it guarantees stable production and aerospace-grade product quality. It has established a professional CAE simulation team to provide strong support for product performance optimization. Equipped with a full set of five-axis machining and non-destructive testing equipment, it ensures post-processing precision and product reliability. With these advantages, Viasen New Materials is proficient in both "custom processing according to drawings" and "joint R&D", and its product performance stability and consistency are among the top in the industry.