Which mechanism caused repeated cracking in the Liberty Bell after its arrival in Philadelphia?

💡 Explanation

When the Liberty Bell was rung, stress concentration occurred at the sharp corner of a pre-existing casting flaw because the bell material lacked sufficient tensile strength, leading to crack propagation. Therefore cracking resulted, rather than expansion, corrosion or embrittlement which require different environmental or material conditions.

• Which mechanism causes the 'tin pest' phenomenon to weaken organ pipes in cold cathedrals?
• Which risk increased when Roman siege engines like ballistae exceeded their design firing range?
• Which risk arose when using torsion catapults to hurl incendiary projectiles at wooden fortifications?
• Which risk increases in early bronze cannons when rapidly fired in succession without cooling?
• On Andean agricultural terraces, which consequence results from inadequate drainage channel maintenance?
• Which risk increased in early Mesoamerican maize agriculture via genetic selection for larger kernels on the central cob?