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Modulus of typical CARBON fibers is approximately:
A{'text': '0.1-1 GPa', 'label': 'D'}
B{'text': '230-700 GPa (range depending on PAN-based standard vs ultra-high-modulus pitch)', 'label': 'B'}
C{'text': '3000 GPa', 'label': 'C'}
D{'text': '10-20 GPa', 'label': 'A'}
Answer & Solution
Correct answer: B. {'text': '230-700 GPa (range depending on PAN-based standard vs ultra-high-modulus pitch)', 'label': 'B'}
Carbon fibers span a huge property range. Standard-modulus PAN-based: ~230 GPa. Intermediate: ~290 GPa. High-modulus pitch: 500-700 GPa. Strength typically decreases as modulus increases. Compare to E-glass (~70 GPa).
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