CRACK-PROPAGATION PREVENTING STRUCTURE, METHOD FOR PREVENTING CRACK PROPAGATION, CRACK-PROPAGATION PREVENTING APPARATUS, AND METHOD FOR PRODUCING SKIN PANEL FOR AIRCRAFT

摘要

A crack-propagation preventing structure that can suppress or prevent the propagation of cracks that would be generated in a metal component or that have been generated in a metal component is provided. The crack-propagation preventing structure includes a point dimple formed by pressing a rigid sphere of a rigid body at an appropriate position on the surface of a metal component, which is subjected to crack-propagation prevention processing.