Time lag in mechanical and optical response of polymers

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Title

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

Creator

Theocaris, PS (EN)

Type

journalArticle (EN)

Partial document
Publication in journal (EN)

Article
Scientific article (EN)

Issued

2014-03-01T01:05:31Z

1974 (EN)

Year

1974 (EN)

Description

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)

Scientific field

Polymer Science (EN)

Natural Sciences ▶ Chemical sciences
Polymer Science (EN)

Subject

Time Lag (EN)

Journal

Polymer (EN)

Language

English

Publisher

ELSEVIER SCI LTD (EN)

Provider