Time lag in mechanical and optical response of polymers

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Time lag in mechanical and optical response of polymers (EN)

Theocaris, PS (EN)

journalArticle (EN)

2014-03-01T01:05:31Z
1974 (EN)


The time dependent transient values of the stress, strain and dielectric susceptibility tensors were measured in a circular disc made of a rheo-optically simple material and subjected to two equal pairs of diametric loads oriented at right angles. The loading programme was suddenly transferred from a rheologic equilibrium of the four-load situation to a transition state with only one pair of diametric loads. In this way the isotropic point (stress, strain or birefringent), existing at the centre of the disc for the four equal-load configuration, split into a pair of isotropic points moving along a diameter of the disc and tending to its circular boundary. The velocities of isotropic points along the diameter of the disc with time allowed the study of the phase lag between the stress, strain, and optical principal axes. The material chosen for the experiments was a strongly plasticized epoxy polymer. The study extended along the whole viscoelastic spectrum of the material. Important results were revealed for the mechanical and optical viscoelastic behaviour of rheo-optically simple materials. © 1974. (EN)

Polymer Science (EN)

Time Lag (EN)

Polymer (EN)

Αγγλική γλώσσα

ELSEVIER SCI LTD (EN)




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