Sharif Digital Repository

Multi-point optimization of lean and sweep angles for stator and rotor blades of an axial turbine

Author

Asgarshamsi, A.

Pub. Year

2014

Subjects

Axial flow turbomachinery. / Computational fluid dynamics. / Gas turbines. / Genetic algorithms. / Navier Stokes equations. / Optimization. / Rotors (windings) / Stators. / Turbine components. / Turbomachine blades. / Turbulent flow. / Aerodynamic shape optimization. / Compressible Navier-Stokes. / Experimental investigations. / Numerical optimizations. / Optimization method. / Optimization parameter. / Total efficiency. / Turbine performance. / Shape optimization.

Some improvements on the one-step inverse isogeometric analysis by proposing a multi-step inverse isogeometric methodology in sheet metal stamping processes

Author

Isazadeh, A. R.

Publisher

Elsevier Inc,

Pub. Year

2021

Subjects

Computation theory. / Deformation. / Drawing (forming) / Formability. / Geometry. / Linear systems. / Metal analysis. / Metal stamping. / Potential energy. / Sheet metal. / Strain. / Deformation theory of plasticities. / Governing equations. / Isogeometric analysis. / Nurbs basis functions. / One step inverse analysis. / Severe Deformation. / Sheet metal deformation. / Strain distributions. / Inverse problems.

The strain gradient approach for determination of forming limit stress and strain diagrams

Author

Safikhani, A. R.

Pub. Year

2008

Subjects

Computer simulation. / Constitutive equations. / Difference equations. / Differential equations. / Differentiation (calculus) / Forecasting. / Gradient methods. / Linear equations. / Metal forming. / Metals. / Molecular beam epitaxy. / Ordinary differential equations. / Sheet metal. / Collocation method. / Forming limit diagram. / Forming limit stress diagram. / Forming limits. / Imperfection sensitivity. / In-homogeneity. / Internal length scale. / K method. / Material softening. / Non-linear. / Numerical simulations. / Path dependent. / Second orders. / Sheet metal forming. / Strain diagrams. / Strain gradient plasticity. / Strain gradient theory. / Strain gradients. / Forming.

Forming limit diagrams of ground St14 steel sheets with different thicknesses

Author

Hashemi, R.

Pub. Year

2012

Subjects

Absolute values. / Bending effect. / Forming limit diagrams. / Forming limits. / Grinding process. / Initial thickness. / Sheet thickness. / Standard test method. / Automotive industry. / Metal forming. / Steel sheet.

The effect of the imposed boundary rate on the formability of strain rate sensitive sheets using the M-K Method

Author

Hashemi, R.

Pub. Year

2013

Subjects

Effect of strain. / Sheet. / Forming limit diagrams. / Forming limits. / Inhomogeneities. / Rate sensitive. / Boundary rates. / Theoretical methods. / Forming. / Materials science. / Mechanical properties. / Strain. / Strain rate.

Influence of joint arrangement on the fracture behavior of lead-free solder joints

Author

Mirmehdi, S.

Publisher

Springer,

Pub. Year

2021

Subjects

Cantilever beams. / Fracture. / Fracture mechanics. / Fracture toughness. / Lead-free solders. / Loads (forces) / Soldered joints. / Strain energy. / Strain rate. / Stress analysis. / Tensile stress. / Critical strain energy release rates. / Double cantilever beam. / Electronic device. / Fracture behavior. / Joint deformations. / Lead-free solder joint. / Stress component. / Stress triaxiality factor. / Loading.

Cyclic contraction-expansion extrusion (CCEE): an innovate severe plastic deformation method for tailoring the microstructure and mechanical properties of magnesium AZ91 alloy

Author

Mashoufi, K.

Publisher

Elsevier Editora Ltda,

Pub. Year

2023

Subjects

Electron microscopy. / Grain refinement. / Magnesium AZ91 alloy. / Mechanical properties. / Severe plastic deformation. / X-ray analysis.

The strain gradient approach to predict necking in tube hydroforming

Author

Hashemi, R.

Pub. Year

2013

Subjects

Model. / Adaptive simulation. / ANSYS parametric design language. / Bulge forming. / Finite element models. / Forming limit diagrams. / Load paths. / Loading path. / Numerical. / Strain gradient theory. / Strain gradients. / Tube hydroforming. / Finite element method. / Forming. / Loading. / Models. / Tubes (components)

Multi-objective optimization of lean and sweep angles for stator and rotor blades of an axial turbine

Author

Asgarshamsi, A.

Publisher

SAGE Publications Ltd,

Pub. Year

2015

Subjects

Aerodynamics. / Aerospace applications. / Algorithms. / Axial flow turbomachinery. / Computational fluid dynamics. / Design. / Gas turbines. / Genetic algorithms. / Multiobjective optimization. / Navier Stokes equations. / Optimization. / Rotors. / Rotors (windings) / Shape optimization. / Stators. / Transonic flow. / Turbomachine blades. / Aero-dynamic performance. / Aerodynamic shape optimization. / Automated design procedures. / Axial turbine. / Computational fluid dynamics simulations. / lean. / sweep. / Two-dimensional airfoils. / Turbine components.

Multi-point optimization of lean and sweep angles for stator and rotor blades of an axial turbine

Author

Asgarshamsi, A.

Pub. Year

2017

Subjects

Axial turbine. / Lean. / Optimization. / Sweep.

Fluid-structure interaction analysis in microfluidic devices: A dimensionless finite element approach

Author

Afrasiab, H.

Pub. Year

2012

Subjects

Finite element simulation. / Small time instability. / Arbitrary Lagrangian Eulerian. / Arbitrary Lagrangian Eulerian method. / Experimental data. / FEM simulations. / Finite element simulations. / Finite-element approach. / Fluid problem. / Governing equations. / High frequency. / High frequency HF. / Incompressible fluid. / Micro pump. / Micro-fluid. / Microfluidic devices. / Micropumping. / Nano scale. / Scale-up. / Solid structures. / Three dimensional finite elements. / Time step. / Vibrating structures. / Fluid structure interaction. / Fluidic devices. / Thermal barrier coatings. / Finite element method.

Proposal of a new design for valveless micropumps

Author

Afrasiab, H.

Pub. Year

2011

Subjects

Arbitrary LagrangianEulerian (ALE) method. / Finite element simulation. / FluidStructure Interaction (FSI) analysis. / Valveless micropump. / Centerlines. / Channel inlets. / Innovative design. / Micropumping. / New design. / Three dimensional finite element model. / Traveling wave. / Design. / Inlet flow. / Pumps. / Three dimensional. / Design method. / Eulerian analysis. / Finite element method. / Fluid mechanics. / Fluid-structure interaction. / Innovation. / Lagrangian analysis. / Numerical model. / Pump. / Pumping. / Technological development. / Three-dimensional modeling. / Wave generation.

Application of inverse finite element method in tube hydroforming modeling

Author

Einolghozati, M.

Pub. Year

2013

Subjects

Fluid pressure. / Inverse finite element method. / Axial feeding. / Commercial software. / Deformation theory of plasticities. / Experimental datum. / Fluid pressures. / Forming limit diagrams. / Free bulging. / Inverse finite element methods. / Modeling technique. / Three-dimensional deformations. / Trial-and-error process. / Tube hydro forming. / Two dimensional spaces. / Deformation. / Finite element method. / Three dimensional. / Tubes (components)

Ideal orientations of BCC crystals under equibiaxial tension loading

Author

Khajeh Salehani, M.

Publisher

SAGE Publications Inc

Pub. Year

2016

Subjects

Crystal orientation. / Crystal structure. / Crystal symmetry. / Deformation. / Newton-Raphson method. / Nonlinear equations. / Spinning (fibers) / Crystal plasticity. / Equibiaxial tension. / Ideal orientations. / Lattice spin. / Loading.

Prediction of ideal orientations and lattice rotations of FCC crystals in the equibiaxial tension loading: A rate-dependent crystal plasticity approach

Author

Hajian, M.

Publisher

SAGE Publications Inc

Pub. Year

2016

Subjects

Crystal plasticity. / Euler space. / Lattice spin. / Preferred orientations. / Rate-dependent model. / Rolling textures. / Deformation. / Newton-Raphson method. / Nonlinear equations. / Strain. / Crystal plasticity. / Euler space. / Lattice spin. / Preferred orientations. / Rate-dependent models. / Rolling texture. / Crystal orientation.

Effect of source strength on dislocation pileups in the presence of stress gradients

Author

Zamani, Z.

Pub. Year

2015

Subjects

Dislocation pileups. / Stress gradient plasticity. / Continuum mechanics. / Plasticity. / Dislocation pileup. / Dislocation sources. / Dislocation theory. / Size effects. / Stress gradient. / Yield stress.

Stress gradient interpretation of boundary layers in passivated thin films

Author

Zamani, Z.

Publisher

Elsevier Ltd,

Pub. Year

2016

Subjects

Hardening rate. / Passivated thin films. / Size effects. / Stress gradient plasticity. / Boundary layers. / Copper. / Forecasting. / Hardening. / Interfaces (materials) / Passivation. / Plasticity. / Discrete dislocations. / Dislocation pileup. / Length scale parameter. / Material parameter. / Numerical results. / Numerical solution. / Stress gradient. / Thin films.

On the material modeling of the autofrettaged pressure vessel steels

Author

Farrahi, G. H.

Pub. Year

2009

Subjects

High strength steels. / Pressure vessel. / Accurate analysis. / Accurate modeling. / Autofrettage. / Autofrettaged tubes. / Bauschinger effects. / Chemical compositions. / Germany. / Material behavior. / Material modeling. / Material models. / Material processing. / Pressure vessel steels. / Switzerland. / Test method. / Torsion tests. / Uni-axial tension-compression test. / Uniaxial tensions. / Boilers. / Caissons. / Compression testing. / Materials. / Pressure vessels. / Torsion testing. / Unloading. / High strength steel.

Analysis of deep drawing process to predict the forming severity considering inverse finite element and extended strain-based forming limit diagram

Author

Bostan Shirin, M.

Publisher

Shahid Rajaee Teacher Tarining University (SRTTU),

Pub. Year

2018

Subjects

Blank shape. / Extended strain-based forming limit diagram. / Inverse finite element method. / Nonlinear deformation. / Sheet metal forming. / Strain path.

Crystal plasticity modeling and experimental characterization of strain localization and forming limits in ferrite-pearlite steels

Author

Isavand, S.

Publisher

Elsevier Ltd,

Pub. Year

2021

Subjects

Deformation. / Micromechanics. / Microstructure. / Morphology. / Pearlite. / Plasticity. / Scanning electron microscopy. / Strain. / Volume fraction. / Crystal plasticity. / Crystal plasticity models. / Deformation behavior. / Experimental characterization. / Ferrite-pearlite steel. / Forming limit diagrams. / Forming limits. / Microstructural morphology. / Representative volume elements. / Strain localizations. / Ferrite.