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Browsing M.S. Theses by Subject "Fracture mechanics."

Browsing M.S. Theses by Subject "Fracture mechanics."

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  • A system of cracks in an elastic half-plane 
    Alnıak, M. Oktay. (Thesis (M.S.)- Bogazici University. Institute for Graduate Studies in Science and Engineering, 1981., 1981.)
    The plane elastostatic problem of an isotropic elastic half-plane containing an arbitrary system of cracks is considered. Fourier transform technique is employed to obtain the edge dislocation solutions. Using the edge ...
  • A two parameter characterization of edge cracked NiTi shape memory alloy under plane strain conditions 
    Merde, Oğuzhan Fikri. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2022., 2022)
    Shape memory alloys (SMAs) are metallic systems that exhibit reversible, diffusionless, martensitic phase transformation. Employing finite element analyses, the stress fields and crack tip constraints generated are examined ...
  • An investigation of the crack propagation model corpus 
    Sönmez, Fazıl Önder. (Thesis (M.S.)- Bogazici University. Institute for Graduate Studies in Sciences and Engineering, 1991., 1991.)
    Models that predict fatigue crack growth are described, classified and compared with respect to applicability and limitations. Crack opening models were found to be more reliable and better adapted to include interaction ...
  • Analysis of mode III interlaminar fracture toughness of composite materials 
    Gökçen, M. Gökhan. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 1999., 1999.)
    The demand for advanced materials stimulates the research on composites, which provide high stiffness and high toughness. One failure type is delamination or interlaminar fracture, which is analyzed in three modes employing ...
  • Application of electrical potential method to compact tension specimen 
    Gençer, Ferruh. (Thesis (M.S.)- Bogazici University. Institute for Graduate Studies in Science and Engineering, 1981., 1981.)
    In this thesis "Electrical Potential Hethod" is considered. It is an experimental method to monitor sub-critical crack growth. Optimum locations for current and voltage leads and the calibration curve for compact tension ...
  • Comparison of crack initiation criteria in functionally graded materials under mixed mode loading 
    Sürücüoğlu, Çiğdem. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2006., 2006.)
    In this thesis, analytical crack initiation criteria are evaluated in detail. Finite element method is used to determine crack initiation angles for edge cracked functionally graded materials. Minimum strain energy density ...
  • Crack propagation analysis in elastomeric isolation bearings 
    Tıknaz, Emirhan. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2022., 2022)
    This thesis study focuses on the crack propagation analysis in elastomeric isolation bearings. One benchmark problem related to crack propagation analysis in a single-edge notch specimen and two problems related to interface ...
  • Evaluation of fracture parameters of NiTi shape memory alloy using digital image correlation 
    Shafaghi, Nima. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2013., 2013.)
    In this work, Digital Image Correlation (DIC) is used to investigate the e ect of martensitic phase transformation on fracture behavior of NiTi shape memory alloy. To nd out the e ect of phase transformation from austenite ...
  • Experimental study of crack initiation angle in PMMA and PS plates under mixed-mode loading 
    Işık, A. Cenk. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2006., 2006.)
    The purpose of this study is to determine crack initiation angles, the effect of critical radius and T-stress on crack initiation angles using experimental and analytical techniques. The results obtained using the maximum ...
  • Failure behavior of composite laminates under out-of-plane loads 
    Koç, Murat. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2012., 2012.)
    In this study, failure behavior of fiber-reinforced composites under out-of-plane loads is investigated by means of four – point bending tests. Firstly, four – point bending tests are modeled analytically using the classical ...
  • Fatigue behavior of spot welds 
    Ertaş, Ahmet Hanifi. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2004., 2004.)
    The resistance spot welding process is widely used in industry, especially in automotive industry. This type of joining method is used widely because of its simplicity, cheapness and of course reliability which are significant ...
  • Fatigue crack growth prediction and analysis 
    Akyürek, Turgut. (Thesis (M.S.)- Bogazici University. Institute for Graduate Studies in Science and Engineering, 1984., 1984.)
    In this thesis, A computer program predicting the fatigue life of the specimens subjected to randomized black loading is prepared. A detailed description of fatigue crack growth and predictive models are reviewed. The ...
  • Fatigue crack propagation under variable amplitude loading 
    Kaya, Sami. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 1983., 1983.)
    In this thesis, the use of crack growth rate data and analytical retardation models in predicting crack growth under variable amplitude loading is reviewed. The effective stress model developed by willenborg, et al. is ...
  • Fracture characterization of gray cast iron 
    Kurdaş, Osman. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 1983., 1983.)
    The aim of this study is to investigate various fracture properties of gray cast iron and thus to gain an insight of it's behaviour and reliability under conditions where there is a risk of brittle fracture or fatigue ...
  • Fracture mechanics analysis of shape memory alloys using finite elements 
    Şimşek, Miray. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2009., 2009.)
    The objective of this work is to study phase transformation and its effects on macroscopic fracture behavior of superelastic shape memory alloy, Nitinol, using finite elements. For this purpose, A 2-D edge-cracked homogenous ...
  • Incubation time in the stress corrosion cracking of a low carbon steel, a fracture mechanics approach using the J integral parameter 
    Koru, Adnan S. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 1983., 1983.)
    The inoubation period assooiated with the advanoe of a stress oorrosion crack in a low carbon steel exposed to sulphuric acid is investigated. Fatigue pre-cracked Cantilever Beam Specimens are tested in accordance with ...
  • The effect of interface strength on crack interactions in thin film coated substrates 
    Özcan, Can. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2006., 2006.)
    Crack interactions and propagation paths for thin film and substrate systemsare studied by using finite element method. 2D edge crack analysis are performed tovalidate robustness of the method used; results are compared ...
  • The effect of notch geometry on fracture behavior of glass fiber reinforced polyster 
    Elaldı, Faruk. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 1986., 1986.)
    The aim of this study is to determine quantitatively fracture toughness properties as a function of the crack tip radius, and the effect of fatique damage produced at the crack tip to the critical stress intensity factor, ...

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