Results from finite element analysis were used to show that the stress index kσ and the nondimensionalized highly stressed hub length kh of a flat head with a round corner in a pressure vessel subjected to internal pressure are functions of three dimensionless parameters: λ ≡ h/dt, η ≡ t/d, and ρ ≡ r/t. Approximate formulas for estimating kσ and kh from λ, η, and ρ p are given. The formulas can be used for determining a suitable fillet radius for a flat head in order to reduce the fabricating cost and to keep the stress intensity at the fillet under an acceptable limit.

1.
Chen
H.
, and
Zhou
K.
,
1994
, “
Simplified Methods for Calculation of Redundant Moments and Forces at Discontinuities in Pressure Vessels—Part I. Thin Plate-Thin Shell
,”
ASME JOURNAL OF PRESSURE VESSEL TECHNOLOGY
, Vol.
116
, May, p.
201
203
.
1.
Neuber
H. P.
,
1933
, “
Elastische strenge Lo¨sungen zur Kerbwirkung bei Scheiben und Umdrehungsko¨rpern and Ein neuer Ansatz zur Lo¨sung raumlicher Probleme der Elastizita¨tstheorie
,”
Zeits. Angew. Math. Mech.
, Vol.
13
, p.
493
493
;
2.
also,
Zeits. Angew. Math. Mech.
,
1934
, Vol.
14
, p.
203
203
.
This content is only available via PDF.
You do not currently have access to this content.