STEM与日常科技·英语30篇（6）
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How Carbon Fiber Bicycle Frames Balance Strength and Flexibility
碳纤维自行车车架如何兼顾强度与弹性
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Carbon fiber frames are built by layering thin sheets of resin-impregnated fibers onto a mold shaped like a bicycle frame.
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Engineers orient each ply at specific angles—0°, 45°, or 90°—to control stiffness, torsional rigidity, and vibration absorption.
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Vertical flex in the seat stays cushions bumps without sacrificing pedaling efficiency, thanks to strategic fiber layup.
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Torsional stiffness around the bottom bracket ensures power transfers directly to the rear wheel during hard sprints.
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Unlike aluminum or steel, carbon doesn’t fatigue suddenly; instead, damage accumulates slowly and shows as surface cracks or delamination.
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Non-destructive testing like ultrasonic scanning checks for hidden voids or resin inconsistencies before shipping.
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Riders choose frames based on ride quality profiles—endurance models prioritize comfort, while race versions maximize responsiveness.
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Recycling remains challenging, but new chemical processes now recover up to 95% of carbon fiber for reuse in lower-grade composites.
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Designers use finite element analysis software to simulate stresses from potholes, jumps, and braking forces before prototyping.
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This fusion of materials science, mechanical engineering, and human-centered design creates lightweight, responsive, and durable machines.