Large Deformation Elastic Behavior of Low-Density Solid Foams

by William E. Warren, Texas A&M Univ, College Station, United States,
Andrew M. Kraynik, Texas A&M Univ, College Station, United States,

Document Type: Proceeding Paper

Part of: Engineering Mechanics


A strain energy function that describes the nonlinear elastic response of a three-dimensional open-cell foam is developed. A tetrahedral unit cell containing four half-struts that join at equal angles represents essential features of foam microstructure. The deformation of a strut is expressed by compliances for bending and stretching, which are the primary mechanisms for small and large distortion, respectively, of a low-density foam. Higher order contributions to the strain energy are determined by assuming that the structure is effectively pin jointed.

Subject Headings: Deformation (mechanics) | Elastic analysis | Strain | Foaming (material) | Nonlinear response | Microstructure | Struts | Distortion (structural)

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