What is the design philosophy that uses blasting failure as the failure criterion?
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What is the design philosophy that uses blasting failure as the failure criterion?
The design concept based on failure by bursting as a criterion for destruction assumes that the container walls are thick and made of materials with good plasticity; due to strain hardening, more force is required to cause further deformation after the material yields, rather than immediate failure. Only when the container bursts does it truly get damaged!
Ductile materials for pressure vessels generally exhibit strain hardening, and their burst pressure is greater than their full yield pressure. The failure design criterion for blasting takes container rupture as the failure mode
The theory of failure due to blasting holds that materials are not ideally plastic; due to strain hardening, the container will not break down if the pressure does not continue to increase. It is only when the pressure reaches a certain level that the container will burst and fail
Since everyone has already discussed the views related to failure due to blasting, I won’t go into that further. What comes to mind now is another issue: usually, to cause a container to burst, the pressure needs to be much higher than the design pressure. At this point, has the sealing of the equipment become inadequate to meet the usage requirements? Components such as flanges might fail to meet the requirements for a sealing surface due to excessive deformation? In other words, in what applications is this failure mode used, where can the seal still meet the requirements even during blasting?