09-29-2022, 07:36 AM
The question is in reference to "won't rupture after peak pressure is achieved"
The point is the mechanical properties that dictate what the peak yeild/failure pressure is, is changing during an early unlock event resulting in a failure after the peak chamber pressure is achieved. It in a sense is defying basic mechanical logic as the assumption is the brass strength is a constant until initial deformation and the exponential loss of strength due to pressure is fairly constant. It's not being taken into account the material dimension is changing in more than one way resulting in an acceleration to failure over what is expected. X will burst at y pressure. Take same mass and elongate it while keeping outer dimensional width constant results in a loss of mass at the walls to accommodate the stretch. Loss of mass/wall thickness results in lower yeild strength... while unlocking and pressure is dropping, yeild strength degradation from elongation and expansive deformation is outrunning the pressure drop.
I guess OP could actually test this by disabling the gas system. One theory would result in a potential kaboom, or at very least the evidence of the score line. the other would result in a case that is just fine.
The point is the mechanical properties that dictate what the peak yeild/failure pressure is, is changing during an early unlock event resulting in a failure after the peak chamber pressure is achieved. It in a sense is defying basic mechanical logic as the assumption is the brass strength is a constant until initial deformation and the exponential loss of strength due to pressure is fairly constant. It's not being taken into account the material dimension is changing in more than one way resulting in an acceleration to failure over what is expected. X will burst at y pressure. Take same mass and elongate it while keeping outer dimensional width constant results in a loss of mass at the walls to accommodate the stretch. Loss of mass/wall thickness results in lower yeild strength... while unlocking and pressure is dropping, yeild strength degradation from elongation and expansive deformation is outrunning the pressure drop.
I guess OP could actually test this by disabling the gas system. One theory would result in a potential kaboom, or at very least the evidence of the score line. the other would result in a case that is just fine.