Hey guys, I'm new here so please be easy on me if I break any "unwritten" rules. I'm doing a design study on brittle crack growth in ductile materials. As I understand it, when a macroscopic crack is found in a load bearing plate, holes can be drilled at each end to reduce the internal stresses at the crack tips and therefor arrest the growth. My question is: Does anyone know of a specific instance where this method was used to prevent failure and increase service life? Alternatively, an instance where this method could have been used to prevent a failure but was not? Thanks in advance!