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 inclined crack problems in graded media under
thermomechanical loading. A two dimensional finite element model is developed
for inclined cracks located in a functionally graded medium. Structural and
thermal problems are solved using two dimensional finite elements namely 8-
noded triangles. Material properties are sampled directly at the integration points
of the elements, as required by the numerical integral evaluation. The main results
of the study are the stress intensity factors at the crack tip for functionally graded
materials subjected to thermomechanical loading.
| Identifer | oai:union.ndltd.org:METU/oai:etd.lib.metu.edu.tr:http://etd.lib.metu.edu.tr/upload/12607844/index.pdf |
| Date | 01 November 2006 |
| Creators | Demircivi, Bengi |
| Contributors | Dag, Serkan |
| Publisher | METU |
| Source Sets | Middle East Technical Univ. |
| Language | English |
| Detected Language | English |
| Type | M.S. Thesis |
| Format | text/pdf |
| Rights | To liberate the content for public access |
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