Creep-buckling of open-cell foams

Ting Jung Chen, Jong Shin Huang

研究成果: Article同行評審

8 引文 斯高帕斯(Scopus)

摘要

A repeating element composed of four cell struts in a pentagonal dodecahedron model is used to analyze the creep-buckling of open-cell foams. The solid making up the cell struts is assumed to follow power-law creep. As a result, the theoretical expression for describing the failure time for the onset of creep-buckling of open-cell foams under uniaxial compression is obtained. Theoretical results indicate that the creep-buckling of open-cell foams depends on their relative density and microstructural imperfection and the creep parameters of solid cell struts. Furthermore, a simple relationship between creep strain rate and failure time is proposed for the creep-buckling of open-cell foams and then compared to the existing experimental results; they agree well. In addition, cell-strut creep-buckling is the dominant failure mechanism when the imposed compressive stress is close to the elastic buckling strength of open-cell foams. However, cell-strut creep-rupturing is more likely to occur when the imposed compressive stress becomes smaller. Moreover, the transition of failure mechanism from cell-strut creep-buckling to cell-strut creep-rupturing is discussed.

原文English
頁(從 - 到)1497-1503
頁數7
期刊Acta Materialia
57
發行號5
DOIs
出版狀態Published - 2009 三月

All Science Journal Classification (ASJC) codes

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

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