Abstract
This paper addresses the problem of stress concentration in the transition area, between two cylindrical shells with different thicknesses. To reduce the intensity of the stresses and strains developed under the action of external mechanical and /or thermal loads, an original method is proposed, using method of short structural elements for shells, respectively bending moments theory and deformations continuity (displacements and rotations). In this sense, the transition between shell rings is considered linear variable in four constructive variants (with the same inner or outer surface, respectively the same median surface, or different median surfaces). Based on the evaluated intensity of the stress, it can be concluded which is the preferred variant the design stage, or deduction of the same sizes, in case of technological deviations (cutting errors, so as to result the same inner or outer surface, as in case of the same median surface). Article content refers in this configuration the setting mode related of connection loads that will be taken into account in tensions expressions.
Highlights
Avoidance of deterioration risk of any mechanical structures in general, and the structure under pressure and / or temperature, especially involves in particular, the quality of all pre-putting into operation actions and follow up normal operation
This paper proposes the evaluation of loading status, in the crossing beveled zone, between two cylindrical shells with different thicknesses (Figure 1)
The paper sets out how the deduction of link loads, developed under the action of considered external loads, between shells and short structural elements
Summary
Avoidance of deterioration risk of any mechanical structures in general, and the structure under pressure and / or temperature, especially involves in particular, the quality of all pre-putting into operation actions and follow up normal operation. Lifetime of analyzed mechanical structure depends on a properly sized based on the use of some materials and certain performing technical solutions that enable judicious assessment of stresses and deformations values which are produced under the action of existing external loads and which are forecasted to be stable over time. This paper proposes the evaluation of loading status, in the crossing beveled zone, between two cylindrical shells with different thicknesses (Figure 1). The paper sets out how the deduction of link loads, developed under the action of considered external loads, between shells and short structural elements Practice cannot meet always such recommendations, and as such it is required an atypical methodology for specific case
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