Applicability of the mα-tangent method to estimate plastic limit loads of elbows and branch junctions

Jae Min Gim; Sang Hyun Kim; Kyung Dong Bae; Yun-Jae Kim; Jong Sung Kim

doi:10.3795/KSME-A.2017.41.6.499

Applicability of the m_α-tangent method to estimate plastic limit loads of elbows and branch junctions

Jae Min Gim, Sang Hyun Kim, Kyung Dong Bae, Yun-Jae Kim, Jong Sung Kim

School of Mechanical Engineering

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

In this study, the limit loads calculated by the m_α-tangent method based on the linear finite element analysis are compared with the closed form solutions that are proposed by various authors. The objects of the analysis is to select the elbow and the branch pipe which are representative structure of piping system. The applicability of the m_α-tangent method are investigated by applying it to cases with various geometries. The internal pressure and the in-plane bending moment are considered and the m_α-tangent method is in good agreement with the existing solutions in case of elbows. However, the limit loads calculated by the m_α-tangent method for branch junctions do not agree well with the existing solutions and do not show any tendency. The reason is a biased result due to the stress concentration of the discontinuous parts.

Original language	English
Pages (from-to)	499-505
Number of pages	7
Journal	Transactions of the Korean Society of Mechanical Engineers, A
Volume	41
Issue number	6
DOIs	https://doi.org/10.3795/KSME-A.2017.41.6.499
Publication status	Published - 2017 Jun 1

Keywords

Banch
Elbow
In-plane Bending
Internal Pressure
Limit Load
Linear Elastic Analysis
M-tangent Method

ASJC Scopus subject areas

Mechanical Engineering

Access to Document

10.3795/KSME-A.2017.41.6.499

Cite this

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title = "Applicability of the mα-tangent method to estimate plastic limit loads of elbows and branch junctions",

abstract = "In this study, the limit loads calculated by the mα-tangent method based on the linear finite element analysis are compared with the closed form solutions that are proposed by various authors. The objects of the analysis is to select the elbow and the branch pipe which are representative structure of piping system. The applicability of the mα-tangent method are investigated by applying it to cases with various geometries. The internal pressure and the in-plane bending moment are considered and the mα-tangent method is in good agreement with the existing solutions in case of elbows. However, the limit loads calculated by the mα-tangent method for branch junctions do not agree well with the existing solutions and do not show any tendency. The reason is a biased result due to the stress concentration of the discontinuous parts.",

keywords = "Banch, Elbow, In-plane Bending, Internal Pressure, Limit Load, Linear Elastic Analysis, M-tangent Method",

author = "Gim, {Jae Min} and Kim, {Sang Hyun} and Bae, {Kyung Dong} and Yun-Jae Kim and Kim, {Jong Sung}",

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AU - Gim, Jae Min

AU - Kim, Sang Hyun

AU - Bae, Kyung Dong

AU - Kim, Yun-Jae

AU - Kim, Jong Sung

PY - 2017/6/1

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N2 - In this study, the limit loads calculated by the mα-tangent method based on the linear finite element analysis are compared with the closed form solutions that are proposed by various authors. The objects of the analysis is to select the elbow and the branch pipe which are representative structure of piping system. The applicability of the mα-tangent method are investigated by applying it to cases with various geometries. The internal pressure and the in-plane bending moment are considered and the mα-tangent method is in good agreement with the existing solutions in case of elbows. However, the limit loads calculated by the mα-tangent method for branch junctions do not agree well with the existing solutions and do not show any tendency. The reason is a biased result due to the stress concentration of the discontinuous parts.

AB - In this study, the limit loads calculated by the mα-tangent method based on the linear finite element analysis are compared with the closed form solutions that are proposed by various authors. The objects of the analysis is to select the elbow and the branch pipe which are representative structure of piping system. The applicability of the mα-tangent method are investigated by applying it to cases with various geometries. The internal pressure and the in-plane bending moment are considered and the mα-tangent method is in good agreement with the existing solutions in case of elbows. However, the limit loads calculated by the mα-tangent method for branch junctions do not agree well with the existing solutions and do not show any tendency. The reason is a biased result due to the stress concentration of the discontinuous parts.

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