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Prof. Harry H. Hilton
1. Professor Emeritus of Aerospace Engineering, Aerospace Engineering Department, Grainger College of Engineering, 1308 W Green St, Urbana, IL 61801, USA

Basic Info

Basic Info is private.

Research Keywords & Expertise

0 Viscoelasticity
0 Failure criteria
0 Nonlinear aero-viscoelasticity
0 Creep buckling
0 Material property characterization

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Viscoelasticity
Failure criteria
Creep buckling
Stability & control

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Journal article
Published: 02 January 2019 in Journal of Thermal Stresses
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A general analysis is formulated for the closed loop coupled thermal and displacement viscoelastic 1-D wave problem. The proper inclusion of the highly temperature sensitive viscoelastic material properties renders the problem nonlinear, even though the displacements and material properties are considered to obey linear relations. In the present article. the previous analysis is enlarged and reformulated by (a) the inclusion of nonlinear elastic and viscoelastic constitutive relations as formulated in Hilton, (b) the addition of thermal waves to the displacement waves, and by (c) temperature dependent material density and viscoelastic moduli and compliances. The wave problem studied here is of significant importance in modeling, material characterization, determination of instantaneous moduli, nonlinear analytical solution protocols and the nonlinear interaction of temperature, material properties, and wave motions. Analytical and numerical solution protocols are presented and evaluated.

ACS Style

Harry H. Hilton; Mohamed H. Elalfy; Hazem S. Eldahshan; Mohamed Khairy. Coupled 1-D stress and thermal waves in temperature dependent nonlinear elastic and viscoelastic media*. Journal of Thermal Stresses 2019, 42, 122 -151.

AMA Style

Harry H. Hilton, Mohamed H. Elalfy, Hazem S. Eldahshan, Mohamed Khairy. Coupled 1-D stress and thermal waves in temperature dependent nonlinear elastic and viscoelastic media*. Journal of Thermal Stresses. 2019; 42 (1):122-151.

Chicago/Turabian Style

Harry H. Hilton; Mohamed H. Elalfy; Hazem S. Eldahshan; Mohamed Khairy. 2019. "Coupled 1-D stress and thermal waves in temperature dependent nonlinear elastic and viscoelastic media*." Journal of Thermal Stresses 42, no. 1: 122-151.

Journal article
Published: 10 August 2018 in Industrial Lubrication and Tribology
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Purpose This paper aims to investigate the lubrication regime in spherical pump, especially under different structural parameters and operational conditions. Design/methodology/approach A ball-on-plane configuration is adopted to represent the contact model between spherical piston and cylinder cover. The governing equations, which include the Reynolds and elasticity equations, are solved and validated by Jin–Dowson model. Both minimum film thickness and lambda ratio (ratio of minimum fluid film thickness to combined surface roughness of the piston and cylinder cover) of the equivalent model are obtained using an established model. Findings The results indicate that piston diameter and radial clearance are the two main factors affecting the pump lubrication regime. Other related parameters such as rotation speed of the piston, load, viscosity of working medium, material matching and surface roughness of piston and cylinder cover also have different impacts on the lubrication regime of the spherical pump. Originality/value These results emphasize the importance of the design and manufacturing parameters on the tribological performance of spherical pumps and these are also helpful in improving the spherical pump lubrication regime and enlarging its life cycle. This is to certify that to the best of the authors’ knowledge, the content of this manuscript is their own work. This manuscript has only been submitted to this journal and never been published elsewhere. The authors certify that the intellectual content of this manuscript is the product of their own work and that all the assistance received in preparing this manuscript and sources has been acknowledged.

ACS Style

Dong Guan; Harry H. Hilton; Zhengwei Yang; Li Jing; Kuan Lu. Lubrication regime analysis for spherical pump. Industrial Lubrication and Tribology 2018, 70, 1437 -1446.

AMA Style

Dong Guan, Harry H. Hilton, Zhengwei Yang, Li Jing, Kuan Lu. Lubrication regime analysis for spherical pump. Industrial Lubrication and Tribology. 2018; 70 (8):1437-1446.

Chicago/Turabian Style

Dong Guan; Harry H. Hilton; Zhengwei Yang; Li Jing; Kuan Lu. 2018. "Lubrication regime analysis for spherical pump." Industrial Lubrication and Tribology 70, no. 8: 1437-1446.

Conference paper
Published: 07 January 2018 in 2018 AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference
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ACS Style

Dong Guan; Yuta Saito; Harry H. Hilton. Aero-Elastic/Viscoelastic Sensitivity Analyses of Piezoelectric Energy Harvesting Part I: Linear Elastic Results. 2018 AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference 2018, 1 .

AMA Style

Dong Guan, Yuta Saito, Harry H. Hilton. Aero-Elastic/Viscoelastic Sensitivity Analyses of Piezoelectric Energy Harvesting Part I: Linear Elastic Results. 2018 AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference. 2018; ():1.

Chicago/Turabian Style

Dong Guan; Yuta Saito; Harry H. Hilton. 2018. "Aero-Elastic/Viscoelastic Sensitivity Analyses of Piezoelectric Energy Harvesting Part I: Linear Elastic Results." 2018 AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference , no. : 1.

Book chapter
Published: 17 August 2016 in Transdisciplinary Perspectives on Complex Systems
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This chapter [Portions of the analysis and results of this continuing research project were presented at the Fourth International Conference on Inverse Problems, Design and Optimization (IPDO–2013), Albi, France (Hilton and D’Urso, Paper ID 06290, 2013).] reports on a comprehensive optimized inverse analysis protocol that has been formulated at the complex multifunctional, multiphysics and multidisciplinary total system of systems (SoS) level leading to trans-disciplinary convergence for the entire designer vehicle with provisions for optimized/tailored aerodynamics, stability, control, materials, structures, propulsion, performance, sizing, weight, cost, etc. The protocol for these inverse problems is based on a generalized calculus of variations approach, including but not limited to Lagrange multipliers. The possibility of achieving such a generalized unified approach has become a reality through the double advent of modern computer software and hardware. First, the availability of such programs as MATLAB™, MATHEMATICA™, MAPLE™, etc. make it feasible to carry out the detailed large scale analytical enterprises, such as multiple symbolic integrations, differentiations, matrix algebra, etc. Secondly, the online operational advent of the University of Illinois at Urbana-Champaign National Center for Supercomputing Applications/National Science Foundation (UIUC NCSA/NSF) Blue Waters™, the sustained peta-scale (1015 flops/s) computing system (Anonymous, http://​www.​ncsa.​uiuc.​edu/​BlueWaters/​, 2011; Anonymous, http://​www.​ncsa.​illinois.​edu/​News/​Stories/​Kramer/​, 2009; Anonymous, About blue waters, 2014; Anonymous, https://​bluewaters.​ncsa.​illinois.​edu, 2013), will allow efficient solutions of the necessary hundreds of millions of simultaneous nonlinear algebraic equations describing parameters for an entire air or space flight vehicle (Through this chapter the term vehicle is used to denote atmospheric and space flight vehicles unless otherwise specified.) or other large scale SoS that may contain numerous rigid, specified and/or flexible sub-systems as well as aerodynamics, cost, manufacturing, performance, propulsion, stability and control, etc. Illustrative examples are limited to structures, solid mechanics and aero-viscoelastic examples that represent currently available solutions. Additional parts of the entire complex SoS are under investigation and will be reported in archival journals in future years.

ACS Style

Harry H. Hilton; Steven J. D’Urso; Noe Wiener. Designer Systems of Systems: A Rational Integrated Approach of System Engineering to Tailored Aerodynamics, Aeroelasticity, Aero-viscoelasticity, Stability, Control, Geometry, Materials, Structures, Propulsion, Performance, Sizing, Weight, Cost. Transdisciplinary Perspectives on Complex Systems 2016, 49 -84.

AMA Style

Harry H. Hilton, Steven J. D’Urso, Noe Wiener. Designer Systems of Systems: A Rational Integrated Approach of System Engineering to Tailored Aerodynamics, Aeroelasticity, Aero-viscoelasticity, Stability, Control, Geometry, Materials, Structures, Propulsion, Performance, Sizing, Weight, Cost. Transdisciplinary Perspectives on Complex Systems. 2016; ():49-84.

Chicago/Turabian Style

Harry H. Hilton; Steven J. D’Urso; Noe Wiener. 2016. "Designer Systems of Systems: A Rational Integrated Approach of System Engineering to Tailored Aerodynamics, Aeroelasticity, Aero-viscoelasticity, Stability, Control, Geometry, Materials, Structures, Propulsion, Performance, Sizing, Weight, Cost." Transdisciplinary Perspectives on Complex Systems , no. : 49-84.

Article
Published: 03 July 2015 in International Journal of Dynamics and Control
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Divergence and flutter of lifting surfaces obeying fractional derivative (FD) viscoelastic material constitutive relations under separate fractional derivative servo-controls are analytically investigated. The analytical and computational complexities of FD formulations are examined and compared to Prony series formulations, which are the equivalent of integer derivative viscoelastic characterizations. An approximate formulation is offered that facilitates the Fourier transform but not the evaluation of the convolution integrals. Stability in the form flutter and torsional divergence of a two DOF system is investigated in the Laplace transform space by modified Nyquist plots. Illustrative examples demonstrate that the use of Prony series modulus/compliance characterizations offers a much simpler path to stability determinations in real time than the quest for intersections of curves of flight speeds and frequencies associated with fractional derivative representations.

ACS Style

Craig G. Merrett; Harry H. Hilton. Fractional order derivative aero-servo-viscoelasticity. International Journal of Dynamics and Control 2015, 5, 239 -251.

AMA Style

Craig G. Merrett, Harry H. Hilton. Fractional order derivative aero-servo-viscoelasticity. International Journal of Dynamics and Control. 2015; 5 (2):239-251.

Chicago/Turabian Style

Craig G. Merrett; Harry H. Hilton. 2015. "Fractional order derivative aero-servo-viscoelasticity." International Journal of Dynamics and Control 5, no. 2: 239-251.

Book chapter
Published: 01 January 2014 in Encyclopedia of Thermal Stresses
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Aerothermoviscoelasticity; Creep buckling; Flutter; Torsional divergence; Viscoelasticity

ACS Style

Harry H. Hilton; Craig G. Merrett. Linear Aero-Thermo-Servo-Viscoelasticity, Part I: General Theory. Encyclopedia of Thermal Stresses 2014, 2729 -2737.

AMA Style

Harry H. Hilton, Craig G. Merrett. Linear Aero-Thermo-Servo-Viscoelasticity, Part I: General Theory. Encyclopedia of Thermal Stresses. 2014; ():2729-2737.

Chicago/Turabian Style

Harry H. Hilton; Craig G. Merrett. 2014. "Linear Aero-Thermo-Servo-Viscoelasticity, Part I: General Theory." Encyclopedia of Thermal Stresses , no. : 2729-2737.

Book chapter
Published: 01 January 2014 in Encyclopedia of Thermal Stresses
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Aeroelasticity; Flutter; Panel instability; Viscoelasticity

ACS Style

Craig G. Merrett; Harry H. Hilton. Linear Aero-Thermo-Servo-Viscoelasticity, Part II: Dynamic Considerations: Lifting Surface and Panel Flutter and Aerodynamic Noise. Encyclopedia of Thermal Stresses 2014, 2737 -2744.

AMA Style

Craig G. Merrett, Harry H. Hilton. Linear Aero-Thermo-Servo-Viscoelasticity, Part II: Dynamic Considerations: Lifting Surface and Panel Flutter and Aerodynamic Noise. Encyclopedia of Thermal Stresses. 2014; ():2737-2744.

Chicago/Turabian Style

Craig G. Merrett; Harry H. Hilton. 2014. "Linear Aero-Thermo-Servo-Viscoelasticity, Part II: Dynamic Considerations: Lifting Surface and Panel Flutter and Aerodynamic Noise." Encyclopedia of Thermal Stresses , no. : 2737-2744.

Book chapter
Published: 01 January 2014 in Encyclopedia of Thermal Stresses
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This entry covers four distinct areas, namely, the interaction in a closed loop system of designer aerodynamics, of viscoelastic materials and structures, and of controls. The presence of varying temperatures not only induces thermal stresses but also strongly affects material properties. The effects of temperature on viscoelastic material properties as well as on flutter velocities and times to reach flutter conditions are discussed. It is shown that optimized FGM distribution can increase flutter velocities and lengthen the time to when flutter will occur.

ACS Style

Harry H. Hilton. Aeroviscoelasticity Designer FGMs: Passive Control Through Tailored Functionally Graded Materials. Encyclopedia of Thermal Stresses 2014, 78 -87.

AMA Style

Harry H. Hilton. Aeroviscoelasticity Designer FGMs: Passive Control Through Tailored Functionally Graded Materials. Encyclopedia of Thermal Stresses. 2014; ():78-87.

Chicago/Turabian Style

Harry H. Hilton. 2014. "Aeroviscoelasticity Designer FGMs: Passive Control Through Tailored Functionally Graded Materials." Encyclopedia of Thermal Stresses , no. : 78-87.

Conference paper
Published: 03 August 2013 in Conference Proceedings of the Society for Experimental Mechanics Series
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It is shown that for linear isotropic elastic and viscoelastic materials a single type of 1–D set of tension experiments with optical measurements supplies sufficient stress and strain data to completely characterize all moduli (including Young’s, shear and bulk ones) and all compliances. This is accomplished directly in real time space without the use of integral transforms and/or Poisson’s ratios and includes the complete history of loading and of displacements including their build ups. Additionally, several approaches to the determination of instantaneous moduli from 1–D quasi-static and dynamic experimental data are presented and evaluated.

ACS Style

Michael Michaeli; Abraham Shtark; Hagay Grosbein; Eli Altus; Harry H. Hilton. Analytical and Experimental Protocols for Unified Characterizations in Real Time Space for Isotropic Linear Viscoelastic Moduli from 1–D Tensile Experiments. Conference Proceedings of the Society for Experimental Mechanics Series 2013, 75 -81.

AMA Style

Michael Michaeli, Abraham Shtark, Hagay Grosbein, Eli Altus, Harry H. Hilton. Analytical and Experimental Protocols for Unified Characterizations in Real Time Space for Isotropic Linear Viscoelastic Moduli from 1–D Tensile Experiments. Conference Proceedings of the Society for Experimental Mechanics Series. 2013; ():75-81.

Chicago/Turabian Style

Michael Michaeli; Abraham Shtark; Hagay Grosbein; Eli Altus; Harry H. Hilton. 2013. "Analytical and Experimental Protocols for Unified Characterizations in Real Time Space for Isotropic Linear Viscoelastic Moduli from 1–D Tensile Experiments." Conference Proceedings of the Society for Experimental Mechanics Series , no. : 75-81.

Conference paper
Published: 03 August 2013 in Conference Proceedings of the Society for Experimental Mechanics Series
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The objective of this study is to apply the time-temperature superposition principle (TTSP) to the viscoelastic material functions that exhibit a large degree of variability to predict the long-term behavior of a vinyl ester polymer (Derakane 441–400). Short-term tensile creep experiments were conducted at three temperatures below the glass transition temperature. Strain measurements in the longitudinal and transverse directions were measured simultaneously using the digital image correlation technique. The creep compliance functions were characterized using the generalized viscoelastic constitutive equation with a Prony series representation. The Weibull probability density functions (PDFs) of the creep compliance functions were obtained for each test configuration and found to be time and temperature dependent. Creep compliance curves at constant probabilities were obtained and used to develop the master curves for a reference temperature of 24 °C using the TTSP.

ACS Style

Jutima Simsiriwong; Rani W. Sullivan; Harry H. Hilton. Master Creep Compliance Curve for Random Viscoelastic Material Properties. Conference Proceedings of the Society for Experimental Mechanics Series 2013, 41 -47.

AMA Style

Jutima Simsiriwong, Rani W. Sullivan, Harry H. Hilton. Master Creep Compliance Curve for Random Viscoelastic Material Properties. Conference Proceedings of the Society for Experimental Mechanics Series. 2013; ():41-47.

Chicago/Turabian Style

Jutima Simsiriwong; Rani W. Sullivan; Harry H. Hilton. 2013. "Master Creep Compliance Curve for Random Viscoelastic Material Properties." Conference Proceedings of the Society for Experimental Mechanics Series , no. : 41-47.

Journal article
Published: 18 January 2012 in Materials
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Isotropic linear and nonlinear fractional derivative constitutive relations are formulated and examined in terms of many parameter generalized Kelvin models and are analytically extended to cover general anisotropic homogeneous or non-homogeneous as well as functionally graded viscoelastic material behavior. Equivalent integral constitutive relations, which are computationally more powerful, are derived from fractional differential ones and the associated anisotropic temperature-moisture-degree-of-cure shift functions and reduced times are established. Approximate Fourier transform inversions for fractional derivative relations are formulated and their accuracy is evaluated. The efficacy of integer and fractional derivative constitutive relations is compared and the preferential use of either characterization in analyzing isotropic and anisotropic real materials must be examined on a case-by-case basis. Approximate protocols for curve fitting analytical fractional derivative results to experimental data are formulated and evaluated.

ACS Style

Harry H. Hilton. Generalized Fractional Derivative Anisotropic Viscoelastic Characterization. Materials 2012, 5, 169 -191.

AMA Style

Harry H. Hilton. Generalized Fractional Derivative Anisotropic Viscoelastic Characterization. Materials. 2012; 5 (12):169-191.

Chicago/Turabian Style

Harry H. Hilton. 2012. "Generalized Fractional Derivative Anisotropic Viscoelastic Characterization." Materials 5, no. 12: 169-191.

Invited lectures
Published: 08 April 2011 in Journal of Thermal Stresses
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Similarities and differences between thermo-elasticity and thermo-viscoelas- ticity are critically examined and evaluated. Topics include, among others, constitutive relations, Poisson's ratio, energy dissipation, temperature effects on material properties, thermal expansions, loading histories, failure criteria, lifetimes, 1–D beams, torsion, columns, plates, motions in time of neutral axes and shear centers, computational issues, wave propagation, torsional divergence, control reversal, aerodynamic derivatives, flutter and experimental determinations of viscoelastic properties. The full, partial or no possible applications of the elastic/viscoelastic correspondence principle, including approximate approaches, are analyzed and discussed.

ACS Style

Harry H. Hilton. Equivalences and Contrasts of Thermo-Elasticity and Thermo-Viscoelasticity: A Comprehensive Critique. Journal of Thermal Stresses 2011, 34, 488 -535.

AMA Style

Harry H. Hilton. Equivalences and Contrasts of Thermo-Elasticity and Thermo-Viscoelasticity: A Comprehensive Critique. Journal of Thermal Stresses. 2011; 34 (5-6):488-535.

Chicago/Turabian Style

Harry H. Hilton. 2011. "Equivalences and Contrasts of Thermo-Elasticity and Thermo-Viscoelasticity: A Comprehensive Critique." Journal of Thermal Stresses 34, no. 5-6: 488-535.

Journal article
Published: 19 January 2011 in Journal of Elasticity
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Detailed new analytical investigations are presented describing the behavior of Class I, II and III viscoelastic Poisson’s ratios (PR). Their previously demonstrated dependence on stress-time histories, which lead to the inability to consider them as universal viscoelastic material properties and the incapacity to produce a general elastic–viscoelastic correspondence principle (EVCP) based, is expanded. A new Class VI PR is analytically derived from the viscoelastic constitutive relations in the Fourier transform (FT) space to achieve the proper FT form of the elastic/viscoelastic correspondence principle, i.e., the elastic-viscoelastic analogy. However, even though this PR Class is a pure universal material property function, it still fails to provide a convenient and useful path to a correspondence principle due to its inopportune constitutive form in real time space vis-à-vis a thermodynamic model with equivalent attributes. Consequently, no general EVCP involving PRs can be formulated. The derived Class VI PRs are equivalent to the defined Class III PRs with 1-D loadings (stresses).

ACS Style

Harry H. Hilton. Clarifications of Certain Ambiguities and Failings of Poisson’s Ratios in Linear Viscoelasticity. Journal of Elasticity 2011, 104, 303 -318.

AMA Style

Harry H. Hilton. Clarifications of Certain Ambiguities and Failings of Poisson’s Ratios in Linear Viscoelasticity. Journal of Elasticity. 2011; 104 (1-2):303-318.

Chicago/Turabian Style

Harry H. Hilton. 2011. "Clarifications of Certain Ambiguities and Failings of Poisson’s Ratios in Linear Viscoelasticity." Journal of Elasticity 104, no. 1-2: 303-318.

Conference paper
Published: 01 January 2010 in V INTERNATIONAL CONFERENCE ON TIMES OF POLYMERS (TOP) AND COMPOSITES
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The objective of this work is to present the numerical implementation for the alternative determination of vis‐coelastic material properties without using Poisson’s ratios as presented in [1]–[3]. The presented method is based on the 3‐D generalized constitutive relationsviscoelastic materials with hereditary integrals. The numerical procedures are based on experiments using photogrammetric and tensile testing instrumentation, which provide stress data in the 1‐D loaded direction and strains in both longitudinal (loaded) and transverse directions. Measurements and data analyses include both starting transient and steady‐state loading conditions. The paper presents the implementation of solutions for the linear case, where the relaxation time values are prescribed according to to the scheme presented in [1] and [3]. Convergence of the Prony series representations is evaluated.

ACS Style

Michael Michaeli; Abraham Shtark; Hagay Grossbein; Harry H. Hilton; A. D’Amore; Domenico Acierno; Luigi Grassia. Computational Protocols for Viscoelastic Material Property Characterizations without the Use of Poisson’s Ratios. V INTERNATIONAL CONFERENCE ON TIMES OF POLYMERS (TOP) AND COMPOSITES 2010, 1 .

AMA Style

Michael Michaeli, Abraham Shtark, Hagay Grossbein, Harry H. Hilton, A. D’Amore, Domenico Acierno, Luigi Grassia. Computational Protocols for Viscoelastic Material Property Characterizations without the Use of Poisson’s Ratios. V INTERNATIONAL CONFERENCE ON TIMES OF POLYMERS (TOP) AND COMPOSITES. 2010; ():1.

Chicago/Turabian Style

Michael Michaeli; Abraham Shtark; Hagay Grossbein; Harry H. Hilton; A. D’Amore; Domenico Acierno; Luigi Grassia. 2010. "Computational Protocols for Viscoelastic Material Property Characterizations without the Use of Poisson’s Ratios." V INTERNATIONAL CONFERENCE ON TIMES OF POLYMERS (TOP) AND COMPOSITES , no. : 1.

Conference paper
Published: 01 January 2009 in Volume 9: Heat Transfer, Fluid Flows, and Thermal Systems, Parts A, B and C
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The previously formulated analytical and experimental protocols for a single temperature conditions in [1] are extended to multi temperatures in order to develop shift factors and master relaxation curves. The system consist of unidirectional tensile creep or relaxation experiments performed on viscoelastic specimen. A combination of a photogrametric device and a tensile testing machine provides stress data in the loaded direction and strains in both longitudinal and transverse directions. The data is integrated through the use of the integral constitutive relations, and produce values for the creep compliance parameters. Subsequently, the viscoelastic Young’s, shear and bulk moduli are determined without the use of viscoelastic Poisson’s ratios (PR). Experimental results indicate strong time, temperature, stress and stress history dependencies of viscoelastic PRs.

ACS Style

Abraham Shtark; Hagay Grossbein; Harry H. Hilton. Viscoelastic Temperature Dependent Characterization Protocols Without the Use of Poisson’s Ratios. Volume 9: Heat Transfer, Fluid Flows, and Thermal Systems, Parts A, B and C 2009, 389 -402.

AMA Style

Abraham Shtark, Hagay Grossbein, Harry H. Hilton. Viscoelastic Temperature Dependent Characterization Protocols Without the Use of Poisson’s Ratios. Volume 9: Heat Transfer, Fluid Flows, and Thermal Systems, Parts A, B and C. 2009; ():389-402.

Chicago/Turabian Style

Abraham Shtark; Hagay Grossbein; Harry H. Hilton. 2009. "Viscoelastic Temperature Dependent Characterization Protocols Without the Use of Poisson’s Ratios." Volume 9: Heat Transfer, Fluid Flows, and Thermal Systems, Parts A, B and C , no. : 389-402.

Conference paper
Published: 01 January 2007 in Volume 12: New Developments in Simulation Methods and Software for Engineering Applications
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Analytical and experimental protocols are formulated and outlined in detail wherein unidirectional tensile creep or relaxation experiments are performed on viscoelastic specimen. A combination of a photogrametric system and a tensile testing machine provides stress data in the loaded direction and strains in both longitudinal and transverse directions. The data is integrated through the use of the integral constitutive relations, and produce values for the creep compliance parameters. Subsequently, the viscoelastic Young’s, shear and bulk moduli are determined without the use of viscoelastic Poisson’s ratios. Experimental results indicate strong time, stress and stress history dependencies of viscoelastic PRs. Current experimental results are compared with traditional methods based on assumed time independent Poisson ratios. Maximum errors in strain values from 160% to 205% for the constant PR approach are demonstrated when its results are compared to results for the experimental time interval.

ACS Style

Abraham Shtark; Hagay Grosbein; Guy Sameach; Harry H. Hilton. An Alternative Protocol for Determining Viscoelastic Material Properties Based on Tensile Tests Without the Use of Poisson’s Ratios. Volume 12: New Developments in Simulation Methods and Software for Engineering Applications 2007, 437 -454.

AMA Style

Abraham Shtark, Hagay Grosbein, Guy Sameach, Harry H. Hilton. An Alternative Protocol for Determining Viscoelastic Material Properties Based on Tensile Tests Without the Use of Poisson’s Ratios. Volume 12: New Developments in Simulation Methods and Software for Engineering Applications. 2007; ():437-454.

Chicago/Turabian Style

Abraham Shtark; Hagay Grosbein; Guy Sameach; Harry H. Hilton. 2007. "An Alternative Protocol for Determining Viscoelastic Material Properties Based on Tensile Tests Without the Use of Poisson’s Ratios." Volume 12: New Developments in Simulation Methods and Software for Engineering Applications , no. : 437-454.