The Influence of Loads Superposition, Deterioration Due to Cracks and Residual Stresses on the Strength of Tubular Junction

Jinescu, Valeriu V.; Chelu, Angela; Zecheru, Gheorghe; Pupazescu, Alexandru; Sima, Teodor; Draghici, Gheorghe

Valeriu V. Jinescu, Angela Chelu, Gheorghe Zecheru, Alexandru Pupazescu, Teodor Sima, Gheorghe Draghici

The Influence of Loads Superposition, Deterioration Due to Cracks and Residual Stresses on the Strength of Tubular Junction

Abstract:

In the paper the interaction of several loads like pressure, axial force, bending moment and torsional moment are analyzed, taking into account the deterioration due to cracks and the influence of residual stresses. A nonlinear, power law, of structure material is considered. General relationships for total participation of specific energies introduced in the structure by the loads, as well as for the critical participation have been proposed. On these bases: - a new strength calculation methods was developed; - strength of tubular cracked structures and of cracked tubular junction subjected to combined loading and strength were analyzed. Relationships for critical state have been proposed, based on dimensionless variables. These theoretical results fit with experimental date reported in literature. On the other side stress concentration coefficients were defined. Our one experiments onto a model of a pipe with two opposite nozzles have been achieved. Near one of the nozzles is a crack on the run pipe. Trough the experiments the state of stress have been obtained near the tubular junction, near the tip of the crack and far from the stress concentration points. On this basis the stress concentration coefficients were calculated.

Keywords:
strength of tubular structure; crack; residual stress; tubular junction strength; critical parameters for cracked structures

Issue: 2017, Volume 68, Issue 6

Pages: 1267-1273

Publication date: 2017/7/15

https://doi.org/10.37358/RC.17.6.5655

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This article is published under the Creative Commons Attribution 4.0 International License

Citation Styles

Cite this article as:
JINESCU, V.V., CHELU, A., ZECHERU, G., PUPAZESCU, A., SIMA, T., DRAGHICI, G., The Influence of Loads Superposition, Deterioration Due to Cracks and Residual Stresses on the Strength of Tubular Junction, Rev. Chim., 68(6), 2017, 1267-1273.

Vancouver
Jinescu VV, Chelu A, Zecheru G, Pupazescu A, Sima T, Draghici G. The Influence of Loads Superposition, Deterioration Due to Cracks and Residual Stresses on the Strength of Tubular Junction. Rev. Chim.[internet]. 2017 Jun;68(6):1267-1273. Available from: https://doi.org/10.37358/RC.17.6.5655

APA 6th edition
Jinescu, V.V., Chelu, A., Zecheru, G., Pupazescu, A., Sima, T. & Draghici, G. (2017). The Influence of Loads Superposition, Deterioration Due to Cracks and Residual Stresses on the Strength of Tubular Junction. Revista de Chimie, 68(6), 1267-1273. https://doi.org/10.37358/RC.17.6.5655

Harvard
Jinescu, V.V., Chelu, A., Zecheru, G., Pupazescu, A., Sima, T., Draghici, G. (2017). 'The Influence of Loads Superposition, Deterioration Due to Cracks and Residual Stresses on the Strength of Tubular Junction', Revista de Chimie, 68(6), pp. 1267-1273. https://doi.org/10.37358/RC.17.6.5655

IEEE
V.V. Jinescu, A. Chelu, G. Zecheru, A. Pupazescu, T. Sima, G. Draghici, "The Influence of Loads Superposition, Deterioration Due to Cracks and Residual Stresses on the Strength of Tubular Junction". Revista de Chimie, vol. 68, no. 6, pp. 1267-1273, 2017. [online]. https://doi.org/10.37358/RC.17.6.5655

Text
Valeriu V. Jinescu, Angela Chelu, Gheorghe Zecheru, Alexandru Pupazescu, Teodor Sima, Gheorghe Draghici,
The Influence of Loads Superposition, Deterioration Due to Cracks and Residual Stresses on the Strength of Tubular Junction,
Revista de Chimie,
Volume 68, Issue 6,
2017,
Pages 1267-1273,
ISSN 2668-8212,
https://doi.org/10.37358/RC.17.6.5655.
(https://revistadechimie.ro/Articles.asp?ID=5655)
Keywords: strength of tubular structure; crack; residual stress; tubular junction strength; critical parameters for cracked structures

RIS
TY - JOUR
T1 - The Influence of Loads Superposition, Deterioration Due to Cracks and Residual Stresses on the Strength of Tubular Junction
A1 - Jinescu, Valeriu V.
A2 - Chelu, Angela
A3 - Zecheru, Gheorghe
A4 - Pupazescu, Alexandru
A5 - Sima, Teodor
A6 - Draghici, Gheorghe
JF - Revista de Chimie
JO - Rev. Chim.
PB - Revista de Chimie SRL
SN - 2668-8212
Y1 - 2017
VL - 68
IS - 6
SP - 1267
EP - 1273
UR - https://doi.org/10.37358/RC.17.6.5655
KW - strength of tubular structure; crack; residual stress; tubular junction strength; critical parameters for cracked structures
ER -

BibTex
@article{RevCh2017P1267,
author = {Jinescu Valeriu V. and Chelu Angela and Zecheru Gheorghe and Pupazescu Alexandru and Sima Teodor and Draghici Gheorghe},
title = {The Influence of Loads Superposition, Deterioration Due to Cracks and Residual Stresses on the Strength of Tubular Junction},
journal = {Revista de Chimie},
volume = {68},
number = {6},
pages = {1267-1273},
year = {2017},
issn = {2668-8212},
doi = {https://doi.org/10.37358/RC.17.6.5655},
url = {https://revistadechimie.ro/Articles.asp?ID=5655}
}

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