Transient thermal stresses in pressure vessels in the vicinity of a circular opening

Book · Wed Nov 01 04:00:00 EST 1995

OSTI ID:122585

Russo, E P; Herrington, P D ^[1]; Cyr, W W ^[2]

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1. Univ. of New Orleans, LA (United States). Mechanical Engineering Dept.
2. National Aeronautics and Space Administration, Stennis Space Center, MS (United States). Test and Engineering Directorate

Solutions for the stress distribution in a large diameter pressure vessel in the vicinity of a circular opening which is undergoing radial and temporal changes in temperature are presented in a systematic and straightforward manner for use by practicing engineers. A typical example is a hot or cold pipe penetrating a vessel with the accompanying temperature gradients causing transient thermal stresses. Three types of thermal boundary conditions are considered on the boundary, namely: convection on the boundary; insulated surface; and sudden surface heating or cooling, that is, thermal shock. These transient stresses may be brief and decay rapidly as the temperature gradient decreases from the opening allowing a contraction or expansion of the surface. However, stress levels could be sufficient to produce a permanent set in the material causing residual stresses to be present when the vessel has reached thermal equilibrium. The solution methodology outlined provides a unique and accurate technique for determining the thermal stresses. Sample results are presented.

• OSTI ID: 122585
• Report Number(s): CONF-950740--; ISBN 0-7918-1349-5
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
PRESSURE VESSELS
SPACE DEPENDENCE
STRESS ANALYSIS
THEORETICAL DATA
THERMAL STRESSES
TIME DEPENDENCE