Nanobot Swarm Fatigue-Crack Repair (2D)

A patrol of autonomous nanorobots crawls a top-down view of an aircraft skin panel that is quietly growing a fatigue crack under repeated pressurization cycles. The crack follows a real Paris' Law growth model — stress intensity ΔK rises with crack length until the panel reaches its critical length and fails. Dial in the cyclic stress and loading rate to control how fast the crack races forward, then size the swarm and its per-bot repair rate to see whether autonomous, no-teardown nanorepair can hold the crack below critical length indefinitely, or only buy time. Drag the panel view to pan and scroll to zoom, and watch the live strip chart track crack length and ΔK against the critical-length line.