Design of microstructures and structures with negative linear compressibility in certain directions

C. N. Weng, K. T. Wang, T. Chen

Research output: Chapter in Book/Report/Conference proceedingConference contribution

14 Citations (Scopus)

Abstract

The linear compressibility of a solid is defined as the relative decrease in length of a line when the solid is subjected to unit hydrostatic pressure. Materials with a negative linear or area compressibility could have interesting technological applications. However, in the case of homogeneous materials only rare crystal phases exhibit this effect. In particular, for isotropic or cubic solids the linear compressibility is known to be isotropic and positive, namely a sphere of a cubic or isotropic crystal under hydrostatic pressure remains a sphere. For less symmetric solids, it generally varies with the direction n. Here we derive explicit expressions of the stationary values (maximum and minimum) of linear compressibility for single phase solids with monoclinic, orthotropic, tetragonal, trigonal, and hexagonal symmetry. A list of crystals that may exhibit negative linear compressibility in certain directions is outlined. Next, by assembling a two-component material, we propose microstructure networks to achieve such a property. Numerical simulations, based on a refined finite element method, are provided.

Original languageEnglish
Title of host publicationAdvances in Fracture and Materials Behavior - Selected, peer reviewed papers of the Seventh International Conference on Fracture and Strength of Solids (FEOFS2007)
PublisherTrans Tech Publications
Pages807-814
Number of pages8
ISBN (Print)0878493999, 9780878493999
DOIs
Publication statusPublished - 2008
Event7th International Conference on Fracture and Strength of Solids, FEOFS 2007 - Urumqi, China
Duration: 2007 Aug 272007 Aug 29

Publication series

NameAdvanced Materials Research
Volume33-37 PART 2
ISSN (Print)1022-6680

Other

Other7th International Conference on Fracture and Strength of Solids, FEOFS 2007
CountryChina
CityUrumqi
Period07-08-2707-08-29

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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