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Thermo-elastic creep analysis and life assessment of thick truncated conical shells with variable thickness

Taghizadeh, Tahereh; Nejad, Mohammad Zamani; Davoudi Kashkoli, Mosayeb

Authors

Tahereh Taghizadeh

Mohammad Zamani Nejad

Mosayeb Davoudi Kashkoli



Abstract

A semi-analytical method is presented to investigate time-dependent thermo-elastic creep behavior and life assessment of thick truncated conical shells with variable thickness subjected to internal pressure and thermal load. Based on the first-order shear deformation theory (FSDT), equilibrium equations and boundary conditions are derived using the minimum total potential energy principle. To the best of the researcher's knowledge, in previous studies, thermo-elastic creep analysis of conical shell with variable thickness based on the FSDT has not been investigated. Norton's law is assumed as the material creep constitutive model. The multilayered method is proposed to solve the resulting equations, which yields an accurate solution. Subsequently, the stresses at different creep times can be obtained by means of an iterative approach. Using Robinson's linear life fraction damage rule, the creep damages of conical shells are determined and Larson-Miller parameter (LMP) is employed for assessing the remaining life. The results of the proposed approach are validated with those of the finite element method (FEM) and good agreement was found. The results indicate that the present analysis is accurate and computationally efficient.

Journal Article Type Article
Acceptance Date Oct 17, 2019
Online Publication Date Dec 16, 2019
Publication Date Nov 30, 2019
Deposit Date Jan 9, 2024
Journal International Journal of Applied Mechanics
Print ISSN 1758-8251
Electronic ISSN 1758-826X
Publisher World Scientific Publishing
Peer Reviewed Peer Reviewed
Volume 11
Issue 9
Article Number 1950086
DOI https://doi.org/10.1142/S1758825119500868
Keywords Creep; life assessment; conical shell; variable thickness; first-order shear deformation theory.
Public URL https://uwe-repository.worktribe.com/output/11598374