A solution for the contact between two spherical particles undergoing large deformation

Hui Li, S. Saigal, P. T. Wang

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

A unit model consisting of two particles in contact and under compression, leading to the development of an internal state variable (ISV) constitutive model incorporating the particle-to-particle contact during large deformations, is studied. Following Matthews' approximation that a general form of the Hertz elastic contact solution holds for nonlinear materials, an analytical solution based on the ISV constitutive model and valid for the small contact stage is first derived for the unit problem. To account for large contact areas, the analytical solution is modified based on numerical results obtained from a detailed finite element analysis of the compression of two identical spherical aluminum particles in contact. A set of unified relations is derived from this analysis that accounts for the strain rate effects and accurately represents the particle-to-particle contact behavior for both small and large contact areas. The performance of the proposed model is validated through comparisons with detailed numerical results obtained for a wide range of strain rates.

Original languageEnglish (US)
Pages (from-to)2591-2598
Number of pages8
JournalActa Materialia
Volume44
Issue number7
DOIs
StatePublished - Jul 1996
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Polymers and Plastics
  • Metals and Alloys

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