Stress calculation of stiffeners in atmospheric pressure rectangular vessels
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It is a rectangular open container at atmospheric pressure, with dimensions of 9.5 m (length) × 3 m (width) × 3 m (height); there is a partition in the middle, and it is reinforced with flat steel on the outside. The stress calculation results for the workbench are shown in the figure below: Calculation results: (1) Maximum deformation: 6.3 mm； (2) Although the maximum stress is 432 MPa (the stress display range in the graph has been manually adjusted), it is concentrated mainly in certain areas of the flat steel; most of the stress within the box remains below 50 ； Question: (1) When calculated according to the standards (Type E), the reinforcement columns required are very dense and large in size; I’m not sure why (2) Based on the stress calculation results, most of the stresses and deformations in the box are relatively low; only certain areas have higher stresses. Can it still be used properly?
Although the maximum stress is 432 MPa, if the stress on the reinforcing flat steel exceeds the allowable value, it may break due to excessive stress; once the flat steel breaks, it can no longer provide reinforcement for the box, which will affect its functionality.
Based on the membrane bending assessment, 432 MPa exceeds the limit. Increase the thickness and height of the stiffeners or increase their density
A paper stated that areas with higher local stress can dissipate quickly, which seems to make some sense as well
What is the wall thickness of yours? 10 thick?