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Relaxation effects on thermal shock problems in an elastic half-space of generalized magneto-thermoelastic waves

Othman M. I. A.

Mechanics and Mechanical Engineering

2004

Vol. 7, nr 2

165-178

The propagation of electromagneto-thermo-elastic disturbances produced by thermal shock based on Lord-Shulman (L-S), Green-Lindsay (G-L) and classical dynamical coupled (CD) theories in a perfectly conducting half-space are studied. There acts an initial magnetic field parallel to the plane boundary of the half-space. The normal mode analysis is used to obtain the exact expressions for the considered variables. The distributions of the considered variables are represented graphically for each case. A comparison is made with the results predicted by the coupled theory. It is found that the magnetic field has decreasing effect.

Experimental study of a PA66 solid polymer in the case of cyclic shear loading

Bles G., Gadaj S. P., Nowacki W. K., Tourabi A.

Archives of Mechanics

2002

Vol. 54, nr 2

155-174

Experimental mechanical results concerning cyclic shear tests without lateral force and simple shear tests with measurement of temperature, performed on sheet samples of PA66 polyamide, are presented. These tests are performed using special shear devices, attached to a classical tensile testing machine. The aim of our work was the examination of thermomechanical characteristics of solid polyamide during shear loading. This study allowed us to analyse the changes of the stress and strain characteristics, shear modulus, ratcheting, relaxation effects and thermomechanical effects.