Features of plastic deformation of amorphous glassy polymers in stress relaxation and creep regimes

Берлин, А. А.; Grineva, N.S.; Aleksanyan, G. G.; Karpenko, Yu.P.; Manevich, L. I.

doi:10.1016/0032-3950(86)90151-6

Cited by 2 publications

(7 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This leads to the maximum on the σ-ε curve disappear ing (Fig. 4), which agrees well with the experimen tal data [1][2][3]. …”

Section: Second Deformationsupporting

confidence: 89%

“…It was shown previously on polyarylate films that initial rate of stress relaxation σ 0 depends on initial level of stress [2,3] and the phenomenological model that predicts loop dependence ln on σ 0 (see Fig. 5 in [2]).…”

Section: Relaxationmentioning

confidence: 82%

“…Experimental data for the plastic deformation of some polymer films in the modes of stress relax ation and creeping were obtained in [1][2][3], and it was shown that (a) the annealing of the polymer films at tempera tures that are increased but lower than the glass transi tion point leads to the appearance (if it was not in the initial film) and increase of the fluidity peak on σ-ε diagram;…”

mentioning

confidence: 99%

“…Relying on the results obtained, a phenomenologi cal model was proposed [1][2][3] based on the assump tion of formation and rise during the plastic deforma tion of some elements of the structure (named plas tons) in which the shear deformation is facilitated by the type of shear cracks. In this case, it is significant that, for these structures, as for cracks, the stress con centration in the crack mouth increases with its size R by the law R 1/2 , which leads to acceleration of the plas tic deformation (or decrease of the active stress at the given deformation rate, i.e., "deformation softening") according to the equation where σ is active stress; T is temperature; k is the Bolt zmann constant; and A, G, and χ are material con stants.…”

mentioning

confidence: 99%

See 3 more Smart Citations

Modeling of plastic deformation of glasses in creeping and stress relaxation regimes

et al. 2015

View full text Add to dashboard Cite

Molecular dynamic (MD) modeling of low temperature deformation of the uniaxial compres sion and tension of glass of 1000 molecules of C 13 H 28 oligomer is carried out. The influence of annealing and second deformation of glass on the σ-ε diagram and the dependence of the system relaxation rate on its deformation degree and sample creeping are investigated. The modeling results of mechanical behavior are in good agreement with the experimental data for the glassy polymers that allows one to use MD modeling for further deep study of the glass behavior mechanisms under mechanical actions.

show abstract

“…This leads to the maximum on the σ-ε curve disappear ing (Fig. 4), which agrees well with the experimen tal data [1][2][3]. …”

Section: Second Deformationsupporting

confidence: 89%

Section: Relaxationmentioning

confidence: 82%

mentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

Modeling of plastic deformation of glasses in creeping and stress relaxation regimes

et al. 2015

View full text Add to dashboard Cite

show abstract

“…According to [27,28], the plastic flow of polymers during stretching below the glass transition temperature develops in shear bands with a lowered density of the material and accordingly increases the free volume. As a result, the true shear stress decreases and further deformation is facilitated.…”

Section: Introductionmentioning

confidence: 99%

Plastic deformation of polyethylene terephthalate films during rolling

et al. 2015

View full text Add to dashboard Cite

Amorphous polyethylene terephthalate was oriented via rolling on a laboratory mill under room conditions. The influence of rolling on the polymer structure was investigated. The plastic deformation of the polymer was inhomogeneous at the initial stages of rolling. The deformation was localized in a system of almost perpendicular shear bands forming a zigzag. In polarized light, the zigzag area of plastic flow looked like a regular system of parallel optical bands and possessing approximately identical thicknesses. The dis tance between the shear bands was approximately equal to double the thickness of the film. The development of the zigzag after compression was attributed to the true effect of strain softening of the polymer. While mov ing to the opposite surface, the perpendicular band emerged in the existing band after the release of shear bands on the film surface.

show abstract

Features of plastic deformation of amorphous glassy polymers in stress relaxation and creep regimes

Cited by 2 publications

References 3 publications

Modeling of plastic deformation of glasses in creeping and stress relaxation regimes

Modeling of plastic deformation of glasses in creeping and stress relaxation regimes

Plastic deformation of polyethylene terephthalate films during rolling

Contact Info

Product

Resources

About