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Browsing Makina Mühendisliği by Subject "Shape memory alloys."

Browsing Makina Mühendisliği by Subject "Shape memory alloys."

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  • 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 ...
  • Analysis of crack initiation in edge cracked NiTi shape memory alloy plate 
    Baykara, Onat. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2022., 2022)
    Shape Memory Alloys (SMAs) are getting more known among scientist and the engineers day by day. Therefore, their industrial, military and also daily life applications are increasing. Their unique properties make them very ...
  • Characterization of NiMnGa magnetic shape memory alloys 
    Pirge, Gürsev. (Thesis (Ph.D.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2005., 2005.)
    Magnetic shape memory (MSM) alloys are a new class of actuator materials withhigh actuation frequency, energy density and strain and they can be used in themanufacturing of actuators, smart structures, sensors and transducers. ...
  • Constitutive models of shape memory alloys and their implementation to finite elements 
    Yurtoğlu, Mete. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2012., 2012.)
    The aim of this work is to study existing constitutive models for shape-memory alloys and to implement them to nite elements. Fracture behavior in Mode-I and mixed-mode is studied and, for this purpose, a 2-D edge cracked ...
  • Eeffect of loading rate on fracture of NiTi 
    Mutlu, Fatma. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2016., 2016.)
    This thesis studies the e ect of loading rate on fracture behavior of Shape Memory Alloy (SMA) NiTi. First, Di erential Scanning Calorimetry (DSC) are used to obtain the phase transformation temperatures of NiTi. Then ...
  • Effect of loading rate and thermomechanical coupling on fracture of shape memory alloys 
    Özbaş, İsmail Yiğit. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2019., 2019.)
    This work is on the investigation of the effect of loading rate and thermomechan ical coupling on mechanical behavior and fracture of shape memory alloys (SMA). The constitutive model of Zaki and Moumni (ZM) is studied in ...
  • Evaluation of crack tip singular fields in shape memory alloys 
    Özerim, Gülcan. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2017., 2017.)
    In this thesis crack tip singular fields of an edge cracked shape memory alloy (SMA) plate under plane stress & Mode I are studied using similarities between loading paths of a pseudoelastic SMA and a strain hardening ...
  • Experimental analysis and modeling of porous NiTi shape memory alloys 
    Özerim, Gülcan. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2022., 2022)
    Porosity brings new features to NiTi SMAs, and raises its potential for biomedical applications. Although different techniques are provided in the literature for manufacturing porous NiTi samples, the subject is still open ...
  • Experimental investigation of the effect of phase transformation on francture parameters of NiTi shape memory alloy 
    Haghgouyan, Behrouz. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2013., 2013.)
    This thesis aims to investigate the effect of martensitic phase transformation on fracture parameters of Nickel-Titanium (NiTi) SMA. NiTi specimens were characterized using optical microscopy and uniaxial tensile testing. ...
  • 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 ...
  • Theoretical and numerical analysis of fracture of shape memory alloys 
    Hazar, İbrahim Selçuk. (Thesis (Ph.D.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2014., 2014.)
    The subject of this thesis is theoretical and numerical analysis of the fracture of SMAs. First, the size of the martensitic region surrounding the tip of an edge-crack in a SMA plate is calculated analytically using the ...

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