This PDF file includes:

• Note S1. Molecular dynamics.
• Note S2. Bond failure criterion.
• Note S3. Defect-free SWNT under tension.
• Note S4. SWNT with defects under tension.
• Note S5. Effect of prestresses in topological defects.
• Note S6. Comparison with solid mechanics theories.
• Note S7. Alternative estimation of the SWNT fracture toughness.
• Table S1. Defect dimensions and simulation results.
• Fig. S1. Simulated stresses around a Stone-Wales defect.
• References (54–61)

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Other Supplementary Material for this manuscript includes the following:

• Movie S1. Crack propagation illustration (separate file).