TITLE

Negative and conventional Poisson’s ratios of polymeric networks with special microstructures

AUTHOR(S)
Wei, Gaoyuan
PUB. DATE
February 1992
SOURCE
Journal of Chemical Physics;2/15/1992, Vol. 96 Issue 4, p3226
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
A theoretical model for evaluating effective Poisson’s ratios of polymeric networks with special microstructures has been developed, which takes into account both stretching and bending deformation mechanisms. It is a complete generalization of the formalism first presented by Warren and Kraynik [Mech. Mater. 6, 27 (1987) and J. Appl. Mech. 55, 341 (1988)] for analytically calculating effective elastic properties of certain types of polymeric foams. Structural anisotropy in two special microstructures considered is found to have very significant effects on both magnitude and sign of the effective Poisson’s ratios of the macroscopically isotropic network materials containing them. As two limiting cases, the effective Poisson’s ratios of random assemblies of 2D and 3D bars or rods are shown to be 1/3 and 1/4, respectively, the latter of which recovers the well-known Poisson’s result.
ACCESSION #
7630772

 

Related Articles

  • The theory of semipermeable vesicles and membranes: An integral-equation approach. II. Donnan equilibrium. Zhou, Yaoqi; Stell, George // Journal of Chemical Physics;12/1/1988, Vol. 89 Issue 11, p7020 

    Integral equations that yield the charge and density profiles are derived for a Donnan system, in which an ionic solution is separated into two regions by a semipermeable membrane (SPM) or a spherical semipermeable vesicle (SPV). These equations are obtained from the Ornstein–Zernike (OZ)...

  • High surface area electrodes in ionic polymer transducers: Numerical and experimental investigations of the electro-chemical behavior. Akle, Barbar J.; Habchi, Wassim; Wallmersperger, Thomas; Akle, Etienne J.; Leo, Donald J. // Journal of Applied Physics;Apr2011, Vol. 109 Issue 7, p074509 

    Ionomeric polymer transducer (IPT) is an electroactive polymer that has received considerable attention due to its ability to generate large bending strain (>5%) and moderate stress at low applied voltages (±2 V). Ionic polymer transducers consist of an ionomer, usually Nafion, sandwiched...

  • The Interpretation of the Strain-Dependent Poisson’s Ratio in Auxetic Polyethylene. Alderson, K L; Alderson, A; Evans, K E // Journal of Strain Analysis for Engineering Design (Professional ;1997, Vol. 32 Issue 3, p201 

    The strain-dependent behaviour characteristic of auxetic (i.e. having a negative Poisson’s ratio) polymers has been modelled using a simple geometric model which consists of rectangular nodules interconnected by fibrils. Careful consideration of the correct form of the model to use...

  • ELASTOMÄ’RA AMORTIZATORA STINGUMA APRĒĶINS, Å…EMOT VÄ’RÄ€ TÄ€ STARPSLĀŅA DEFORMÄ€CIJU. Gonca, Vladimirs; Gutakovskis, Viktors; Kobriņecs, Romans // Transport & Engineering;2008, Vol. 28, p166 

    Here is discussed the method of getting the dependence of „force --compression” for rubber -- metal elements which are working for tension -- compression with taking in to the consideration the deformation of not elastomeric support layers. Therefore here is discussed the stiffness...

  • Elastic properties of a Poisson–Shear material. Teik-Cheng Lim // Journal of Materials Science;Aug2004, Vol. 39 Issue 15, p4965 

    Reports the derivation of elastic properties of a Poisson-Shear material for infinitesimal deformation based on a combined hexagonal honeycomb and re-entrant microstructures. Computation of the elastic coefficients by taking the double derivative of the potential energy of hinge rotational...

  • Strain hysteresis of polymers. Beloshenko, V.; Beigel’zimer, Ya.; Varyukhin, V.; Voznyak, Yu. // Doklady Physical Chemistry;Jul2006, Vol. 409 Issue 1, p207 

    The article presents a physical chemistry research on strain hysteresis of polymers. Simultaneous recording of radial and axial strains reveals novel features of the behavior of polymer materials. A negative value of Poisson's ratio is ensured in the elastic range. A physical model predicts a...

  • Yarn ball polymer microstructures: A structural transition phenomenon induced by an electric field. Kossyrev, Pavel A.; Crawford, Gregory P. // Applied Physics Letters;12/4/2000, Vol. 77 Issue 23 

    We report on an unusual polymer "yarn ball" microstructure that is created through a template-based synthetic process involving reactive mesogens. We present experimental results of a unique structural transition of the yarn ball when subjected to an electric field, and describe this transition...

  • Measurement of Poisson's ratios for yellow-poplar. Zink, Audrey G.,; Hanna, Robert B., // Forest Products Journal;Mar1997, Vol. 47 Issue 3, p78 

    Determines Poisson's ratios for yellow-poplar (Liriodendron tulipifera) using digital image correlation technique (DICT). Summary of average Poisson's ratios for yellow-poplar; LT Poisson's ratios for yellow-poplar through an increasing load series; Use of multiple measurements for calculating...

  • Making and characterizing negative Poisson's ratio materials. Lakes, R. S.; Witt, R. // International Journal of Mechanical Engineering Education;Jan2002, Vol. 30 Issue 1, p50 

    We present an introduction to the use of negative Poisson's ratio materials to illustrate various aspects of mechanics of materials. Poisson's ratio is defined as minus the ratio of transverse strain to longitudinal strain in simple tension. For most materials, Poisson's ratio is close to 1/3....

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics