Circumferential crack problem for an fgm cylinder under thermal stresses

Date

1999-01-01

Author

Dağ, Serkan
Kadıoğlu, Fevzi Suat

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

236
views

0
downloads

The main objective of this study is to determine the stress intensity factors associated with a circumferential crack in a thin-walled cylinder subjected to quasi-static thermal loading. The cylinder is assumed to be a functionally graded material In order to make the problem analytically tractable, the thin-walled cylinder is modeled as a layer on an elastic foundation whose thermal and mechanical properties are exponential functions of the thickness coordinate. Hence a plane strain crack problem is obtained. First temperature and thermal stress distributions for a crack-free layer are determined. Then using these solutions, the crack problem is reduced to a local perturbation problem where the only nonzero loads are the crack surface tractions. Both internal and edge cracks are considered. Stress intensity factors ale computed as functions of crack geometry, material properties, and time.

Subject Keywords

Crack problem, Thin-walled cylinder, Stress intensity factor, Thermal stress, Functionally graded material, Functionally graded material, Elastic foundation

URI

https://hdl.handle.net/11511/40798

Journal

Journal of Thermal Stresses

DOI

https://doi.org/10.1080/014957399280698

Collections

Department of Mechanical Engineering, Article

Suggestions

OpenMETU
Core

Analytical Solution of a Crack Problem in a Radially Graded FGM Cetin, Suat; Kadıoğlu, Fevzi Suat (2008-09-25) The objective of this study is to determine stress intensity factors (SIFs) for a crack in a functionally graded layer bonded to a homogeneous substrate. Functionally graded coating contains an edge crack perpendicular to the interface. It is assumed that plane strain conditions prevail and the crack is subjected to mode I loading. By introducing an elastic foundation underneath the homogeneous layer, the plane strain problem under consideration is used as an approximate model for an FGM coating with radial...
Thermal stress problems ın FGMS Akdoğan, Esra Nur; Kadıoğlu, Fevzi Suat; Department of Mechanical Engineering (2019) In this thesis transient temperature distribution, thermal stresses and thermal stress intensity factors (TSIFs) of an infinitely long functionally graded material (FGM) strip containing periodic cracks under thermal shock are studied. Thermal shock is applied by imposing a sudden change in the boundary temperatures. Solution of the present thermoelasticity problem is considered in three successive steps. First the thermal (conduction) problem is solved and the transient temperature distribution is determin...
Three dimensional fracture analysis of orthotropic materials Akgül, Görkem; Dağ, Serkan; Department of Mechanical Engineering (2012) The main objective of this study is to examine the three-dimensional surface crack problems in orthotropic materials subjected to mechanical or thermal loading. The cracks are modeled and embedded in the orthotropic material by considering semielliptical crack front geometry. In the model special elements are embedded in the crack front region, in this way it is possible to include crack tip singular fields along the crack front. Three-dimensional finite element analyses are conducted to obtain mode I stres...
Micro processing by intense fast electron beam Goktas, H; Kirkici, H; Oke, G; Udrea, M (2001-06-22) Generation of intense electron beams by superposing two discharges, namely a low pressure do glow discharge and a high current pulsed discharge at pressures and voltages very similar to that of the pseudo-spark gap devices, has been reported previously [1, 2]. The small diameter, high peak current and short pulse length are the characteristics of the electron beam generated using this technique. In this technique, no high vacuum facilities are necessary, and many applications such as micro processing, X-ray...
Thermal stress intensity factor evaluation for inclined cracks in functionally graded materials using Jk-integral method Demirçivi, Bengi; Dağ, Serkan; Department of Mechanical Engineering (2006) The main objective of this study is to evaluate mixed mode stress intensity factors for inclined embedded cracks in functionally graded materials. Fracture analysis of inclined cracks requires the calculation of both Mode I and Mode II stress intensity factors ( I K , II K ). In this study, k J -integral is used to calculate I K and II K . Equivalent domain integral approach is utilized to evaluate the k J - integral around the crack tip. The present study aims at developing a finite element model to study ...

Citation Formats

S. Dağ and F. S. Kadıoğlu, “Circumferential crack problem for an fgm cylinder under thermal stresses,” Journal of Thermal Stresses, pp. 659–687, 1999, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/40798.