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Depth Profiling of Temperature in Heated Materials Using Ultrasonic Technique Combined with Finite Different Calculation Ikuo Ihara Nagaoka University of Technology 1603-1 Kamitomioka, Nagaoka, 940-2188, JP Phone: +81-258-47-9720, Email: ihara@mech.nagaokaut.ac.jp Manabu Takahashi Sendai National College of Technology, Natori, Miyagi Abstract: In the fields of materials science and processing, there are high demands for monitoring internal temperature and its distribution in a heated material. This is basically because temperature is one of the most important factors that dominate the material properties and behavior. In particular, it is strongly required to monitor the temperature profile and its transient variation of the material being processed at high temperatures because such temperature profile during the process often influences the quality and productivity of final products. In this work, a new ultrasonic method for monitoring temperature gradient of a material being heated or cooled is presented. The method provides non-invasive monitoring of internal temperature gradient of materials during heating or cooling. The principle of the method is based on the temperature dependence of the velocity of ultrasonic wave propagating through a material. An effective analysis method coupled with a finite difference calculation is developed to determine one-dimensional temperature distributions along the direction of ultrasound propagation in material. The advantage of the proposed method is that no boundary condition at the heating or the cooling surface is needed. To verify the practical feasibility of the method, some experiments have been demonstrated for industrial materials such as steel, aluminum and ceramics. A single side of a specimen of 30 mm thickness is heated up to 200 degree C by contacting with a heater and subsequently cooled down by contacting with water or ice. Ultrasonic pulse-echo measurements are then performed for the specimen and the measured transit time of ultrasound across the specimen is used for the analysis to determine temperature gradient in the specimen. The temperature gradient and its transient variation determined by the ultrasonic method almost agree with those obtained using thermocouples or an infrared radiation camera. It has been shown that the ultrasonic method can monitor the transient variation in temperature gradient during heating and cooling in which conventional thermocouples may not be available due to its relatively slow time response. Furthermore, the ultrasonic method is applied to a metal casting process to monitor both internal temperature gradients of a mold and solidified metal during the casting. It is demonstrated that the ultrasonic method has a high potential for on-line or in-situ monitoring of temperature gradients in heated materials. Society of Engineering Science ▪ 47 th Annual Technical Meeting 440
Physics-based Analysis of Infrared Images of Pulsed Buried Heat Sources Steve Holland Iowa State University 2331 Howe Hall, Iowa State University, Ames, 50011, US Phone: 515-294-8659, Email: sdh4@iastate.edu Abstract: Modern infrared thermal cameras allow real time quantitative imaging of heat flow. Vibrothermography is a method of nondestructive evaluation that involves finding cracks from the heat they give off in response to vibration. Finding cracks in vibrothermography requires identifying and localizing pulsed surface and subsurface heat sources from a time-series of infrared images. We present an algorithm that uses a-priori knowledge of heat conduction to constrain curve fits of the temperaturetime profile of the heating at each image pixel. The curve fitting process simultaneously compresses the time-series into a single image, improves sensitivity to faint indications, and estimates the source depth or distance. The critical parameters of fit quality, heating amplitude, and distance are combined into a single hybrid false-color image. This algorithm provides a means to transform the complicated sequence of images from a vibrothermography experiment directly into a single, easy to interpret summary. Examples of how this processing has the potential to improve industrial practice will be discussed. 441 ABSTRACTS
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Abstracts 1 ABSTRACTS
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Contents 4 Foreword 5 Welcome from
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Welcome From College of Engineering
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Roger Fosdick Department of Aerospa
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Invariants in Nonlinear Elasticity
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Coarse-Graining Atomistic Dynamics
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Fracture Behavior of Mechanophore-L
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Stability of periodic media under c
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Three Dimensional Compressible Mult
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Experimental and Modeling Study to
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Thermoresponsive Microcapsules for
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Shear Activation of Mechanophore-Li
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Room Temperature Healing of a Therm
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Collagen Fibrils: Multifunctional N
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Tianxiang Su Mechanical Engineering
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Understanding the Influence of Stra
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Thermodynamic Based Higher-Order Gr
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35 ABSTRACTS
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where is the heating rate. Derivati
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Oxidation and Hole Formation in Alu
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Effect of surface tension and energ
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A Computational Framework for Micro
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45 ABSTRACTS
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It has been suggested that air bubb
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Fig. 2. Melting temperature vs part
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Quantifying the Effect of Pulsatile
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Error analysis for 3-D shape measur
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To test the effects of the ultrasou
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Surface Coverage and Hybridization
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Track 1 Horner Symposia 59 ABSTRACT
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A 3D Pseudo-Elastic Model for Mulli
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Analytical Solutions for the Onset
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References [1] J. D. Humphrey. Nati
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Analysis of Stiffness Variations in
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Indentation of a Nonlinear Viscoela
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Linear Theory for the Bending and S
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Buckling and Finite Deformation of
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Remarks on the Infinitesimal Stabil
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finite characteristic dimensions, t
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On Mathematics in Ray Ogden's Contr
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Superposition of Finite-Amplitude S
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Stability of Electro Active Polymer
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Modelling of Electro-Viscoelasticit
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The Vibration Induced Dissipative H
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Arterial Modeling Considering the M
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A Two-Scale Collagen Turn-Over Mode
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Statistical Non-Linear Fibre-Reinfo
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A Model of Growth and Mass Transfer
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Reading the Mechanical Response of
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Fundamental Solution in Plane Aniso
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Simply Unreal: Grassmann Hypercompl
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Influence of Fiber Dissolution and
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On the electro-mechanical response
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On the Importance of Counterion Con
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Stewart Silling Sandia National Lab
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On the Modeling of Rheological Beha
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Acoustoelastic Measurement of Surfa
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Time permitting, we consider the Ta
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Effect of Nonlinearity on the Stead
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Is Step-Flow Epitaxy Ever Stable? M
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Entropy of a Constrained Hamiltonia
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The Volume Derivative and Fracture
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The Anomalous Behavior of Material
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Energy Release Rate of Dielectric M
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SYMPOSIUM 2-2 Cell Mechanics ORGANI
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study to show the highly three-dime
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Chemomechanics at the Cell-material
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Interplay between Cell and Matrix S
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A Coarse-Grain Molecular Dynamics M
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Contact Mechanics of Circular Membr
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Fibroblast Elongation, Dendritic Ex
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Applying Controlled Loads to Single
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An Overview of Vibro-Acoustography
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Fracture between Molecules Kenneth
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Investigation of Skull Hemorrhage a
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Uncovering Morphological and Morpho
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Microcantilever Based Aptameric Nan
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Fluid-Structure Interaction Models
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Anaylzing Range of Motion in Total
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Direct Measurement of Plastic Dissi
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The Influence of Screw Thread and T
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Static Evaluation of Shear Loading
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during 5000 test cycles, load drop
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Nanomechanics of Tropocollagen and
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Hip Implant Interfacial Motion, a F
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Mapping Tibial Surface Strains usin
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Bone Isotropy Characterization Unde
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Effects of Anthropometric Geometry
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On Stress Theory for Fractal Bodies
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The Kinetic Relation as a Pivotal P
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Creasing Instability in Soft Matter
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Inverse Stress Analysis in AAA Cons
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Experimental and Modeling Study to
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Material Analysis for the Developme
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Experimentally Verified Approach fo
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A Long-Pulse Kolsky Bar Technique f
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Active Porous Scaffolds for Control
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Sensor Behavior of Magneto-Rheologi
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Slipping Plane Plasticity using the
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Internal Fluctuation of DNA in Nano
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Carmel Majidi Harvard University, S
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Coupling of Localized Buckling Defo
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An Energy-Based Approach to Capture
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A Theory of Actuation of Ionic Poly
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Three-Dimensional Imaging of Crysta
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In-situ Reconstruction of Tip-sampl
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TRACK 3 Fluid Mechanics 213 ABSTRAC
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Alan Wineman Comments on the Career
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Numerical Solutions in Nonlinear Ma
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Mathematical Modeling of a New Clas
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Mixture Theory to Study Blood Flow
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Phase Field Theory for Phase Transf
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Nonlocal Gradient-Dependent Constit
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On Unsteady Non-homogenous Flows of
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Fluid Dynamics of the Deepwater Hor
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SYMPOSIUM 3-2 Dynamics and Rheology
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Modeling and Homogenization of Bact
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Dynamics of a Semi-flexible Polar F
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Dense Cellular Blood Flow in a Mode
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Drag, Diffusive Motion, and Mixing
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SYMPOSIUM 3-3 Experimental Fluid Me
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Population, Characteristics and Kin
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The Effect of Particle Concentratio
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A Hybrid Simulation of Continuum an
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An Experimental Study of Pulsed Mic
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SYMPOSIUM 3-5 Fluid Issues in Renew
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Influence of Cylinder Aspect Ratio
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Numerical Investigation of Aerodyna
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SYMPOSIUM 3-8 Multiphase Flow ORGAN
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Three Dimensional Compressible Mult
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Numerical Simulation of Gust Respon
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SYMPOSIUM 4-1 Nanomechanics: Beyond
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Nano Adhesion and Indentation Kenne
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Atomistic Mechanisms of Cyclic Hard
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Broadband Nanoindentation Spectrosc
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Importance of AFM Beam Dynamics for
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Quantitatively Exploring the Mechan
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Effect of Scales and high Temperatu
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Experimental and Model Developments
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Controlled Carbon Nanotube Junction
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Understanding the Influence of Stra
Page 283 and 284:
Temperature and Strain Rate Sensiti
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The Influence of Chemical Substitut
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Non-Uniqueness in Energy Minimizati
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Coarse-Graining Atomistic Dynamics
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simulations will also be discussed,
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Dislocation Cores in Elastically An
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SYMPOSIUM 4-3 Strain Rate Effects i
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Dynamic-Tensile-Extrusion in Low Im
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Wave Profile Shaping for Shock-Tube
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SYMPOSIUM 4-4 Size Scale Effects in
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Atomistic and Continuum Understandi
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Physical Interpretation and Experim
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Tensile Ductility and Plasticity Me
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A New Nonlocal Shell Model for Axis
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Effect of Surface Roughness and Fun
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An Analysis of the Effects of Surfa
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A SEM Image-based Finite Element Ap
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SYMPOSIUM 4-5 Phase Transformations
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Modeling and Simulation of Strain-i
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Nanovoid Nucleation Inside Elastopl
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Molecular Dynamics Study of Thermal
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Effect of Surface Tension and Energ
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A bi-crystal Aggregate Model of Mar
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SYMPOSIUM 4-6 Multifunctional Compo
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Electrified Carbon Fiber Polymer Ma
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Thermal and Mechanical Properties o
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Carbon Nanotube Buckypaper Material
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Effective Parameters of Bucky Gel M
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Influence of Surface Roughness and
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Microvascular Networks for Thermal
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Henghua Jin University of Illinois
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A High Temperature Cured Structural
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Autonomic Structural Cooling via Ad
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Pressurized Vascular Systems for He
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Photovoltaic Waveguide Polymer Comp
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Effect of Silane Coupling Agent on
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Crushing Behavior of Composite Hexa
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Degradation Kinetics of Aerospace W
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Multiscale Modeling of Micro/nano S
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[1] Y.A. HUANG, Z. YIN, A. TESFAMIC
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Quantitative Nondestructive Evaluat
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A Multiscale Model of Rate Dependen
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Localization Analysis of Porous Met
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Negative Stiffness and Negative Poi
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Failure Surfaces for Fiber-Reinforc
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Nonlocal Boundary Layer Method for
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An Exact Solution for History-Depen
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Development of an Internal State Va
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A Study of Highly Crosslinked Epoxy
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Convergence and Scaling in Peridyna
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Graphene Fracture Kyug-Suk Kim Brow
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A Computational Framework for Micro
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Measurement of Mechanical Propertie
Page 389 and 390: The Role of Electrons in Nanostruct
Page 391 and 392: Thermoresponsive Microcapsules for
Page 393 and 394: Elastic Softening of Amorphous and
Page 395 and 396: Autonomic Restoration of Conductivi
Page 397 and 398: Response of Composite Structures to
Page 399 and 400: Lateral Vibration of a Travelling T
Page 401 and 402: Shear Activation of Mechanophore-Li
Page 403 and 404: Cooling Effects on the Vibronic Ban
Page 405 and 406: Dynamoic Damage Tolerance of Aerona
Page 407 and 408: SYMPOSIUM 4-13 Laser and Multi-Ener
Page 409 and 410: Ab initio Simulation of Photo-disso
Page 411 and 412: Laser Texturing of Polyimide for Al
Page 413 and 414: Surface Modification of Titanium Vi
Page 415 and 416: Coating Deposition via Insertion of
Page 417 and 418: Laser Resonant Vibrational Excitati
Page 419 and 420: Femtosecond Laser Fabrication of Ne
Page 421 and 422: Multi-fluid Model of Early-stage Fe
Page 423 and 424: Track 6 Nondestructive Evaluation o
Page 425 and 426: Developments in Testing and Health
Page 427 and 428: High Volume, Remote Sensing, Non-in
Page 429 and 430: Development and Application of Magn
Page 431 and 432: A Performance Measure for Ceramic A
Page 433 and 434: Probing Acoustic Nonlinearity using
Page 435 and 436: Ultrasonics of Periodic Structures
Page 437 and 438: Nanoscale Interfacial Probing of Ru
Page 439: Laser Ultrasonic Thermometry for In
Page 443 and 444: Acoustic Characteristics Measuremen
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