Foam Structures with a Negative Poisson's Ratio

  title={Foam Structures with a Negative Poisson's Ratio},
  author={Roderic S. Lakes},
  pages={1038 - 1040}
  • R. Lakes
  • Published 27 February 1987
  • Linguistics
  • Science
A novel foam structure is presented, which exhibits a negative Poisson's ratio. Such a material expands laterally when stretched, in contrast to ordinary materials. 

Design of a fastener based on negative Poisson's ratio foam

We make use of the negative Poisson's ratio of recently developed cellular solids in the design of a press-fit fastener. Insertion of the fastener is facilitated by the lateral contraction which

Negative Poisson's Ratio Behavior Induced by an Elastic Instability

Negative Poisson's ratio behavior has been uncovered in cellular solids that comprise a solid matrix with a square array of circular voids that results from an elastic instability, which induces a pattern transformation and excellent quantitative agreement is found between calculation and experiment.

Negative Poisson's ratio polymeric and metallic foams

Foam materials based on metal and several polymers were transformed so that their cellular architecture became re-entrant, i.e. with inwardly protruding cell ribs. Foams with re-entrant structures

Contact of Elastic Bodies with Negative Poisson’s Ratio

A class of large deformation contact problems for linear elastic, isotropic bodies exhibiting negative Poisson’s ratio will be considered, Bilateral as well as unilateral contact with friction is

Low Porosity Metallic Periodic Structures with Negative Poisson's Ratio

In this minimal 2D system, the Poisson's ratio can be effectively controlled by changing the aspect ratio of the voids, indicating an effective strategy for designing auxetic structures with desired porosity.

Mechanical response and auxetic properties of composite double-arrow corrugated sandwich panels with defects

Negative Poisson’s ratio structures have attracted great interest due to its many excellent mechanical properties. In recent years, to improve the specific stiffness of the structure, the negative ...

Stress and strain in liquid and solid foams

Both liquid and solid foams, together with analogous cellular materials, have distinctive mechanical or rheological properties which find many applications. This review concentrates on the search for

3D Soft Metamaterials with Negative Poisson's Ratio

Buckling is exploited to design a new class of three-dimensional metamaterials with negative Poisson's ratio and the auxetic properties of these materials exhibit excellent qualitative and quantitative agreement.

Shear compliant hexagonal meso-structures having high shear strength and high shear strain

A shear layer for a shear band that is used in a tire is provided that has multiple cells or units having an auxetic configuration and that are constructed from aluminum or titanium alloys. The cells



The anisotropic behavior of Poisson's ratio, Young's modulus, and shear modulus in hexagonal materials

  • Y. Li
  • Materials Science
  • 1976
A method of calculating the anisotropy of Poisson's ratio is applied to trigonal and tetragonal crystals in the literature. The method of calculation is extended to hexagonal crystals. The results

Encystation and expression of cyst antigens by Giardia lamblia in vitro.

In these studies, encystation of Giardia lamblia in vitro was demonstrated by morphologic, immunologic, and biochemical criteria and will aid in understanding the differentiation of an important protozoan pathogen.

Foundatios ofSolidMechanic (PrenticeHall

  • Englewood Cliffs, NJ,
  • 1968

Trophozoites of strain WB (ATCC #30957) had been grown to late log phase in supplemented (6) Diamond's TYI-S-33 medium (7) as described

  • I thank the University ofIowa Research Foundation fbr filing a patent application for this invention. Specimens of polyester foam were kindly supplied by Foamade Industries

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