Which critical consequence arises when Roman siege catapults repeatedly launch projectiles at stone walls?

💡 Explanation

When repeated impacts bombard a stone wall, fatigue damage occurs because cyclic stress exceeds the material's endurance limit, initiating and propagating micro-cracks that weaken the structure overall. Therefore, accumulative micro-crack propagation causes failure, rather than increased density, reduced velocity, or uniform stress distribution which are unrealistic outcomes of repeated catapult strikes.

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