Browsing Library by Title
Now showing items 2897-2916 of 7484
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Finite Element Analysis on Hybrid Boron-Carbon Composites
(2017-08-28)Adaptability to different situations and the ease of combination makes composites one of the most extensively used materials in the engineering industries. One of the ways of managing properties of composites is hybridization ... -
FINITE ELEMENT APPROACH ON MINIMIZATION OF CRACKS AT I-GIRDER ENDS INDUCED BY PRESTRESS
(2022-11-28)Prestressed I-girders are one of the very commonly and widely used girders for bridges. It is produced at precast plant and transported to bridge site. To produce a prestressed I-girder, strands are first pulled and ... -
Finite Element Based Cross-Sectional Buckling Optimization for a Constant Area, Pinned-Pinned Composite Column
(2016-05-10)In archery, dynamic buckling compromises the target accuracy of arrows. For both dynamic and quasi-static buckling, the buckling load depends on the cross-sectional area moment of inertia, which can be increased by modifying ... -
FINITE ELEMENT BASED METHODOLOGY TO PREDICT FATIGUE COMPRESSION FAILURE IN COMPOSITE BASED ON FIBER KINKING DAMAGE MODEL
(2020-09-04)Advanced polymer matrix composites are widely used in designing high-performance and lightweight spacecraft, rotorcraft, and automotive structures, due to its superior performance such as specific stiffness, specific ... -
Finite Element Based Methodology For Prediction Of Matrix-dominated Failure In Composites
(Aerospace Engineering, 2014-07-14)The objective of this work is to develop a computational failure prognosis methodology applicable to virtual testing of composites. The major motivation for the establishment of virtual testing is the ability to reduce ... -
Finite Element Based Stability Constrained Weight Minimization Of Sandwich Composite Ducts For Airship Applications
(Aerospace Engineering, 2011-10-11)High Altitude Long Endurance (HALE) airships are platform of interest due to their persistent observation and persistent communication capabilities. A novel HALE airship design configuration incorporates a composite sandwich ... -
FINITE ELEMENT BASED WEIGHT REDUCTION SUBJECT TO STABILITY CONSTRAINTS FOR AN AIRSHIP COMPOSITE DUCT
(2016-05-10)The primary functions of High Altitude Long Endurance (HALE) airships are persistent observation and wide area direct line of sight communication. Traditional airships have an ellipsoidal type hull, which is characterized ... -
FINITE ELEMENT MODELING AND STRESS DISTRIBUTION OF UNIDIRECTIONAL COMPOSITE MATERIALS UNDER TRANSVERSAL LOADING
(2017-01-17)Micromechanics of Composites analyze stresses inside any heterogeneous material. These stresses can not only be used for calculation of effective stiffness or compliance, but also for predicting strength and failure modes ... -
Finite Element Modeling Of Carbon Nanotube Reinforced Polymer Composites And Evaluating Its Thermal Conductivities
(Mechanical Engineering, 2007-08-23)High thermal conductivity of carbon nanotubes has motivated us to study and understand the thermal mechanisms in nanocomposites. Though several theoretical models predict a high thermal conductivity for CNT reinforced ... -
Finite Element Modeling Of Prestressed Girder Strengthening Using Fiber Reinforced Polymer And Codal Comparison
(Civil & Environmental Engineering, 2014-03-12)Fiber Reinforced Polymer (FRP) composite materials provide effective and potentially economic solution for rehabilitating and upgrading the existing reinforced and precast concrete bridge structures that have suffered ... -
Fire Performance of Hybrid Fiber Reinforced Self-Consolidating Concrete (HFRSCC) with Glass Pozzolan
(2021-12-17)This research focuses on the effects of hybridizing self-consolidating concrete (SCC) using steel (SF) and polypropylene (PP) fibers to study their benefits post-fire exposure. In an attempt to reduce cement’s environmental ... -
Firm Governance And Shareholder Value Creation: A Study Of Cross-border Acquisitions By U.S. Acquiring Firms
(Management, 2011-10-11)Cross-border acquisitions have become an important part of the arsenal of strategies that firms deploy in internationalizing their operations. With the significant resources that are generally involved in such transactions ... -
Firm-level Entrepreneurship And Performance: An Examination And Extension Of Relationships And Measurements Of The Entrepreneurial Orientation Construct
(Business Administration, 2007-09-17)Academic research in various areas of entrepreneurship has gained momentum over the past three decades. A primary topic of interest has been the characteristics of entrepreneurial organizations, often referred to as the ... -
Firm-Specific Information Environment and Analyst Forecast
(2018-05-04)I examine how firm-specific private and public information affect analyst forecast revisions. I find that when managers easily beat (struggle to meet) the consensus forecasts in the previous quarter, financial analysts ... -
First Direct Measurement Of The Energy Spectra Of Individual Auger Cascade Steps In Solid MnO, Ag And Pd
(Physics, 2007-09-17)We present the first direct measurements of energy spectra of electrons emitted in the later steps of the Auger cascade processes in solids. Measurements were carried out for the L-->MV-->VVV and L-->MM-->MVV-->VVVV Auger ... -
First Measurements Of The Low Energy Tail (LET) Down To 0 eV Using Auger Photoelectron Coincidence Spectroscopy (APECS) In Ag (100) And Cu (100)
(Physics, 2011-03-03)We present the Auger Photoelectron Coincidence Spectroscopy (APECS) measurements of Ag (100) and Cu (100) over a full range of emitted energies from 0 eV to 81eV. The coincidence measurements were successful in separating ... -
First Observation Of Dijet Events With An Antiproton Tag At [square root]s = 1.96 TEV Using The DØ Forward Proton Detector
(Physics, 2007-08-23)The Forward Proton Detector (FPD) is a new sub-system of the DØ detector, a 5000 ton particle physics detector located at the Fermilab Tevatron proton-antiproton collider. The FPD was implemented for the Tevatron Run II ... -
First Principles Computational Modeling Of The Surface Properties Of Uranium Dioxide
(Physics, 2014-07-14)The interaction of uranium dioxide (UO₂) with environmental elements occurs at its exposed surface and a fundamental understanding of this interaction process begins at the atomic scale. In this regard, atomic scale ... -
First Principles Study Of Ga-stabilized δ-Pu Bulk And Surfaces
Plutonium (Pu) metal is highly reactive toward environmental gases and corrodes at a high rate. Due to this inevitable process, containers used to store Pu-based materials may experience catastrophic failure, subsequently ... -
First Principles Study Of Properties Of The Oxidized Cu(100) And Cu(110)
(Physics, 2013-07-22)Copper based catalysts are of importance to a number of industrial processes including the synthesis of methanol, the reduction and decomposition of nitrogen oxides, and treatment of waste water. In copper catalysis surface ...