Journal of Engineering Materials and Technology: Recent submissions
Now showing items 601-620 of 3257
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Integrating the Pressure Sensitive Nonassociative Plasticity by Exponential Based Methods
(The American Society of Mechanical Engineers (ASME), 2013)A nonassociative plasticity model of Drucker–Prager yield surface coupled with a generalized nonlinear kinematic hardening is considered. Conforming to the plasticity model, two exponentialbased methods, called fully ... -
Dynamic Attenuation and Compressive Characterization of Syntactic Foams
(The American Society of Mechanical Engineers (ASME), 2013)Hollow particulate composites are lightweight, have high compressive strength, are low moisture absorbent, have high damping materials, and are used extensively in aerospace, marine applications, and in the manufacture of ... -
Low Cycle Fatigue of Alloy 617 at 850 آ°C and 950 آ°C
(The American Society of Mechanical Engineers (ASME), 2013)The low cycle fatigue behavior of Alloy 617 has been evaluated at 850 آ°C and 950 آ°C, the temperature range of particular interest for the intermediate heat exchanger on a proposed hightemperature gascooled nuclear ... -
Effect of Addition of Nano Al2O3 and Copper Particulates and Heat Treatment on the Tensile Response of AZ61 Magnesium Alloy
(The American Society of Mechanical Engineers (ASME), 2013)In this paper, AZ61 magnesium alloy composites containing nanoalumina and micronsized copper particulates are synthesized using the technique of disintegrated melt deposition followed by hot extrusion. The simultaneous ... -
Identification of Material Constitutive Laws Representative of Machining Conditions for Two Titanium Alloys: Ti6Al4V and Ti555 3
(The American Society of Mechanical Engineers (ASME), 2013)Determining a material constitutive law that is representative of the extreme conditions found in the cutting zone during machining operations is a very challenging problem. In this study, dynamic shear tests, which ... -
Dynamic Fracture Characterization of Small Specimens: A Study of Loading Rate Effects on Acrylic and Acrylic Bone Cement
(The American Society of Mechanical Engineers (ASME), 2013)A longbar apparatus for subjecting relatively small samples to stresswave loading has been devised for failure characterization. A methodology based on digital image correlation (DIC) used in conjunction with ultra highspeed ... -
Forming Limit Diagram Determination of Al 3105 Sheets and Al 3105/Polypropylene/Al 3105 Sandwich Sheets Using Numerical Calculations and Experimental Investigations
(The American Society of Mechanical Engineers (ASME), 2013)Sandwich sheet structures are gaining a wide array of applications in the aeronautical, marine, automotive, and civil engineering fields. Since such sheets can be subjected to forming/stamping processes, it is crucial to ... -
Design Curve Construction Based on Tolerance Limit Concept
(The American Society of Mechanical Engineers (ASME), 2013)Design curves, such as fatigue design SN curves, are usually constructed by analyzing test data, which often exhibit large scatter. There are several methods available to construct a design curve and some of these methods, ... -
Controversy Over Elastic Constants Based on Interatomic Potentials
(The American Society of Mechanical Engineers (ASME), 2013)A controversy exists among literature reports of constraints on elastic constants. In particular, it has been reported that embedded atom method (EAM) potentials generally impose three constraints on elastic constants of ... -
Ultrasound Assisted Hybrid Carbon Epoxy Composites Containing Carbon Nanotubes
(The American Society of Mechanical Engineers (ASME), 2013)A simple approach has been reported toward the development of hybrid nano/microfiber composite structures with improved mechanical properties. Ultrasound assisted atomization process has been utilized for depositing carbon ... -
Mechanical Evaluation of Hydroxyapatite Nanocomposites Using Finite Element Modeling
(The American Society of Mechanical Engineers (ASME), 2013)Hydroxyapatite (HA) has been proposed as a candidate material for bone implants because of its similarity to the inorganic phase in bone. However, due to its lower mechanical properties compared to bone, it has not been ... -
Hierarchical Analysis of the Release Step in a Nanofabrication Process Using an Adhesion/Atomistic Friction Surface Interaction Model
(The American Society of Mechanical Engineers (ASME), 2013)Finite element analysis techniques were used to study the release step in a nanofabrication process. These calculations employed a novel adhesion/atomistic friction surface interaction model to define how the glassy polymer ... -
A New Constitutive Equation to Predict Single Peak Flow Stress Curves
(The American Society of Mechanical Engineers (ASME), 2013)In this study a new constitutive equation, using the extrapolation of dynamic recovery (DRV) flow stress curve and kinetic equation for dynamic recrystallization (DRX), has been developed. This model is expressed in terms ... -
A Nonlinear Finite Element Framework for Viscoelastic Beams Based on the High Order Reddy Beam Theory
(The American Society of Mechanical Engineers (ASME), 2013)A weak form Galerkin finite element model for the nonlinear quasistatic and fully transient analysis of initially straight viscoelastic beams is developed using the kinematic assumptions of the thirdorder Reddy beam theory. ... -
A Plasticity Model for Metals With Dependency on All the Stress Invariants
(The American Society of Mechanical Engineers (ASME), 2013)Recent experiments on metals have shown that all of the stress invariants should be involved in the constitutive description of the material in plasticity. In this paper, a plasticity model for metals is defined for isotropic ... -
Tension–Torsion Combined Loading Test Equipment for a Minute Beam Specimen
(The American Society of Mechanical Engineers (ASME), 2013)In this article, the development of quasistatic tension–torsion combined loading test equipment for a microscale beam specimen is described. The equipment is composed of a piezoelectric actuator in actuator case for ... -
Modeling of the Long Term Behavior of Glassy Polymers
(The American Society of Mechanical Engineers (ASME), 2013)The constitutive model for glassy polymers proposed by Arruda and Boyce (BPA model) is reviewed and compared to experimental data for longterm loading. The BPA model has previously been shown to capture monotonic loading ... -
Investigating Some Technical Issues on Cohesive Zone Modeling of Fracture
(The American Society of Mechanical Engineers (ASME), 2013)This study investigates some technical issues related to the use of cohesive zone models (CZMs) in modeling the fracture of materials with negligible plasticity outside the fracture process zone. These issues include: (1) ... -
The Concept of Physical Metric in the Thermomechanical Modeling of Phase Transformations With Emphasis on Shape Memory Alloy Materials
(The American Society of Mechanical Engineers (ASME), 2013)In this work we derive a new version of generalized plasticity, suitable to describe phase transformations. In particular, we present a general multi surface formulation of the theory which is capable of describing the ... -
Computational Coupled Method for Multiscale and Phase Analysis
(The American Society of Mechanical Engineers (ASME), 2013)On micro scale the constitutions of porous media are effected by other constitutions, so their behaviors are very complex and it is hard to derive theoretical formulations as well as to simulate on macro scale. For decades, ...