STRESSES IN A PRESSURE VESSEL WITH CIRCUMFERENTIAL RING STIFFENERS
Most formulas found in pressure-vessel design codes contain factors which compensate, in a very approximate way, for secondary stresses. These factors are often called factors of ignorance.'' It is often possible to attain a more effectively balanced design pressure vessel at lower cost and with improved safety by evaluating secondary stresses through a rigorous mathematical stress analysis. This appears to be the trend in pressure-vessel design today. Obviously, this will increase engineering costs and indicates the advantage of having design charts, which will permit the rapid evaluation of secondary stresses, based on pertinent parameters. A chart is presented for the determination of the maximum stress adjacent to a circumferential ring stiffener on a thin-wall cylindrical pressure vessel. It has been assumed that the pressure is internal, acts longitudinally as well as radially and that the ring stiffener spacing is such that the infiuence of one does not extend to the next. Stresses are given in terms of stress ratio which is the ratio of the total stress (direct plus secondary) adjacent to the stiffener divided by the hoop stress in the unaffected portion of the shell. (auth)
- Research Organization:
- Travelers Indemnity Co., Hartford, Conn.
- NSA Number:
- NSA-12-002297
- OSTI ID:
- 4345882
- Journal Information:
- Welding J. (N.Y.), Journal Name: Welding J. (N.Y.) Vol. Vol: 36
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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