Carbon fiber reinforced thermoplastics (CFRTP) demonstrate significantly different mechanical properties depending on fiber length. Short fibers (3-6mm) and long fibers (10-50mm) each offer unique advantages for engineering applications. This comparison examines four key performance metrics: stiffness, tensile strength, fracture toughness, and impact resistance. While short fibers provide better processability and isotropic behavior, long fibers deliver superior mechanical performance through enhanced load transfer. The fiber length directly influences the composite’s anisotropy, with longer fibers creating more directional properties. Understanding these differences is crucial for material selection in aerospace, automotive, and industrial applications where specific mechanical requirements must be balanced against manufacturing considerations.
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