Hi guys, Say we have a balloon, not completely inflated like in the sketch picture below. I would like to come up with a set of equations connecting between the increase in pressure inside the balloon and the change in the following dimensions as a result: 1. "neck" length (shown as 40mm ) 2. overall thickness (shown as 15mm) 3. balloon radius (shown as 100mm) 4. balloon material properties (young's modulus, yield strength, density if relevant) So in theory I would be able to input the pressure inside the balloon and receive the "neck"'s new length (shortening) + new thickness + new radius as a result of the balloon inflating and 'taking' away from their dimensions I would love someone to guide me and send me the right way. I can't really use laplace's/pascal law because the thickness is not negligible. Thanks a lot!