I know doing amateur rocketry pressure vessels work until they don't. Motor cases will gladly handle multiple launches and then on the 20th launch, explode. I t

I know doing amateur rocketry pressure vessels work until they don't. Motor cases will gladly handle multiple launches and then on the 20th launch, explode. I think it's a matter of the metal fatiguing over time but I'm not sure how you measure the rate or severity.