Journal of Engineering Materials and Technology: Recent submissions
Now showing items 561-580 of 3257
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Efficient Methodologies for Determining Temperature Dependent Parameters of a Ni Base Superalloy Crystal Viscoplasticity Model for Cyclic Loadings
(The American Society of Mechanical Engineers (ASME), 2014)The prediction of temperaturedependent fatigue deformation and damage in directionally solidified and singlecrystal nickelbase superalloy components used in the hot section of gas turbine engines requires a constitutive ... -
Mechanical Anisotropy and Strain Rate Dependency Behavior of Ti6Al4V Produced Using E Beam Additive Fabrication
(The American Society of Mechanical Engineers (ASME), 2014)Anisotropic mechanical behavior is an inherent characteristic of parts produced using additive manufacturing (AM) techniques in which parts are built layer by layer. It is expected that inplane and outofplane properties ... -
Simulations of Anisotropic Grain Growth Involving Two Phase Nanocrystalline/Amorphous Systems Using Q State Monte Carlo
(The American Society of Mechanical Engineers (ASME), 2014)The present work incorporates an implementation of the two dimensional, Qstate Monte Carlo method to evaluate anisotropic grain growth in twophase nanocrystalline/amorphous systems. Specifically, anisotropic grain boundaries ... -
Aspects of Experimental Errors and Data Reduction Schemes From Spherical Indentation of Isotropic Materials
(The American Society of Mechanical Engineers (ASME), 2014)Sensitivity to experimental errors determines the reliability and usefulness of any experimental investigation. Thus, it is important to understand how various test techniques are affected by expected experimental errors. ... -
Static Recovery Activation Energy of Pure Aluminum at Room Temperature
(The American Society of Mechanical Engineers (ASME), 2014)Thermally activated energy, which varies linearly with static recovered strain, is calculated from static recovery experiments of pure aluminum initially plastically deformed by strainratecontrolled tensile tests up to 10% ... -
Determination of Johnson–Cook Parameters for Cast Aluminum Alloys
(The American Society of Mechanical Engineers (ASME), 2014)A series of experiments were conducted to determine the Johnson–Cook parameters for three different cast aluminum alloys, namely, A356, A357, and F357. Room temperature compression experiments were performed under varying ... -
Shear Deformation in Rectangular Auxetic Plates
(The American Society of Mechanical Engineers (ASME), 2014)Solids that exhibit negative Poisson's ratio are called auxetic materials. This paper examines the extent of transverse shear deformation with reference to bending deformation in simply supported auxetic plates as a ratio ... -
Critical Evaluation of Frequency Domain Approach for Fatigue Damage Estimation
(The American Society of Mechanical Engineers (ASME), 2014)Frequencydomain approach for fatigue damage estimation and lifetime prediction of mechanical components is often used for its computational efficiency and the capability to give a synthetic representation of a random ... -
A Thermovisco Hyperelastic Constitutive Model of NEPE Propellant Over a Large Range of Strain Rates
(The American Society of Mechanical Engineers (ASME), 2014)The uniaxial compressive mechanical curves of nitrate ester plasticized polyether (NEPE) propellant under different temperatures and strain rates have been obtained with a universal testing machine and modified split ... -
Characterizing the Hemming Performance of Automotive Aluminum Alloys With High Resolution Topographic Imaging
(The American Society of Mechanical Engineers (ASME), 2014)We used highresolution quantitative surface analysis to evaluate the surfaces of two aluminum automotive closure panel alloys, which were bent to a 180 deg angle in a simulated hemming test. Maps of the displacements ... -
Finite Element Simulation of Shielding/Intensification Effects of Primary Inclusion Clusters in High Strength Steels Under Fatigue Loading
(The American Society of Mechanical Engineers (ASME), 2014)The change of potency to nucleate cracks in high cycle fatigue (HCF) at a primary nonmetallic inclusion in a martensitic gear steel due to the existence of a neighboring inclusion is computationally investigated using ... -
Nonlinear Viscoelastic Behavior of Active Fiber Composites
(The American Society of Mechanical Engineers (ASME), 2014)In the present study, viscoelastic response of an active fiber composite (AFC) is investigated by conducting stress relaxation and creep deformation tests, and the quasilinear viscoelastic (QLV) constitutive model is used ... -
Microstructure Sensitive Fatigue Modeling of AISI 4140 Steel
(The American Society of Mechanical Engineers (ASME), 2014)A microstructurebased fatigue model is employed to predict fatigue damage in 4140 steel. Fully reversed, strain control fatigue tests were conducted at various strain amplitudes and scanning electron microscopy was employed ... -
Fabrication and Characterization of Carbon Nanotube Nanocomposites Into 2024 T3 Al Substrates Via Friction Stir Welding Process
(The American Society of Mechanical Engineers (ASME), 2014)Carbon nanotube (CNT)aluminum (Al) nanocomposites were prepared using friction stir welding (FSW) processing, and then the mechanical properties of these nanostructured materials were determined using the universal MTS ... -
On the Determination of Material Creep Constants Using Miniature Creep Test Specimens
(The American Society of Mechanical Engineers (ASME), 2014)Full size creep test specimens, i.e., conventional uniaxial creep test specimen and Bridgman notch specimens are usually used to determine the full set of material constants for any creep model. However, in many situations, ... -
Buckling and Vibration of Circular Auxetic Plates
(The American Society of Mechanical Engineers (ASME), 2014)This paper evaluates the elastic stability and vibration characteristics of circular plates made from auxetic materials. By solving the general solutions for buckling and vibration of circular plates under various boundary ... -
Time Independent Plasticity Related to Critical Point of Free Energy Function and Functional
(The American Society of Mechanical Engineers (ASME), 2014)In this paper, timeindependent plasticity is addressed within the thermodynamic framework with internal variables by Rice (1971, “Inelastic Constitutive Relations for Solids: An Internal Variable Theory and Its Application ... -
Effect of Cooling Rate on Mechanical Properties of 7075 Aluminum Rods Extruded in Semisolid State
(The American Society of Mechanical Engineers (ASME), 2014)Semisolid extrusion of metals involves extrusion of metallic alloys with a microstructure consisting of spherical solids in a liquid matrix. In this research, the effect of cooling rate during forward semisolid extrusion ... -
Representative Volume Element Based Modeling of Cementitious Materials
(The American Society of Mechanical Engineers (ASME), 2014)The current work focuses on evaluation of the effective elastic properties of cementitious materials through a voxel based finite element analysis (FEA) approach. Voxels are generated for a heterogeneous cementitious ... -
Reduced Order Constitutive Modeling of Directionally Solidified Ni Base Superalloys
(The American Society of Mechanical Engineers (ASME), 2014)Temperaturedependent crystal viscoplasticity models are ideal for modeling largegrained, directionally solidified Nibase superalloys but are computationally expensive. This work explores the use of reducedorder models that ...