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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 9    No. 1    March 1999

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APPROXIMATE MEANS FOR EVALUATING TENSIL STRENGTH OF HIGH POROSITY MATERIALS①
Liu Peisheng, Fu Chao and Li Tiefan

State Key Laboratoryfor Corrosion and Protection,Institute of Corrosion and Protection of Metals,The Chinese Academy of Sciences, Shenyang110015, P. R. China

Abstract:Based on the simplified structure model of high porosity materials, the formulas for approximately evaluating the tensile strength of these materials have been derived from the corresponding deductions taken by means of the relative theories about geometry and mechanics. The results show that, the tensile strength of these materials not only associates with the material sort and production method, but do further have a direct value relationship with the porosity,θ.This value relationship can be specifically expressed by the power of the item (1-θ), and it makes the tensile strength variation display a complicated nonlinear law with the porosity. In addition, the application of those formulas has been investigated with the corresponding experiment on a nickel foam.

 

Key words: high porosity material tensile strength evaluation

ISSN 1672-7029
CN 43-1423/U

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