Engineering Mechanics

Proceedings Vol. 13 (2007)

ENGINEERING MECHANICS 2007

Copyright © 2007 Institute of Thermomechanics, Academy of Sciences of the Czech Republic, v.v.i., Prague

 

Malášek J.
pages 171 - +7p., full text

Mechanical properties of particular materials (also granular and powdery materials, dispersions, suspensions, liquids with high viscosity,) are usually described by boundary functional dependences of shear stresses and direct stresses – so called material characteristics τ = ± f ( σ ) . These material characteristics are envelope curves of all limiting Mohr´s circles. If the material characteristic is a linear function – all limiting Mohr´s circles are linear affine, if the material characteristic is a non-linear function – all limiting Mohr´s circles and respective stress tensors are non-linear affine. This non-linear affinity can be mathematically described.

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