On the analysis of stress relaxation experiments

Batist, R. De; Callens, A.

doi:10.1002/pssa.2210210223

Cited by 53 publications

(26 citation statements)

References 7 publications

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“…With regard to stress relaxation, the stress dependence of the stress rate is often described in terms of the theory of stress-aided thermal activation (SDTA) and given by [14,18] …”

Section: Theoretical Backgroundmentioning

confidence: 99%

Stress relaxation, creep, and internal stresses in high density polyethylene filled with calcium carbonate

Kubát

Rigdahl³

1987

Rheol Acta

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The effect of filling high density polyethylene (HDPE) with calcium carbonate (up to 50% by weight) on the stress relaxation and the creep in uniaxial extension at room temperature was investigated. The addition of CaCO 3 was found to have a strong influence on the flow behaviour of HDPE. In particular, it was observed that the internal stress level, calculated from relaxation data, increased markedly with the filler content. The reduction in creep rate of the filled samples suggested that the CaCO3-particles induce a change in the structure of the HDPEinterphase close to the filler surface. This was supported by dynamic mechanical measurements performed at low temperatures on swollen HDPE-CaCO3 samples.

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“…With regard to stress relaxation, the stress dependence of the stress rate is often described in terms of the theory of stress-aided thermal activation (SDTA) and given by [14,18] …”

Section: Theoretical Backgroundmentioning

confidence: 99%

Stress relaxation, creep, and internal stresses in high density polyethylene filled with calcium carbonate

Kubát

Rigdahl³

1987

Rheol Acta

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“…In this communication a power law [12,13] is used to describe the stress relaxation behaviour, i. e.…”

Section: Description Of the Viscoelastic Propertiesmentioning

confidence: 99%

The effect of a coupling agent on the viscoelastic properties and internal stresses in high density polyethylene filled with glass spheres

Kubát

Maurer

et al. 1987

Rheol Acta

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It is shown that covalent bonding between high density polyethylene (HDPE) and glass spheres can have a significant influence on the stress relaxation behaviour and the creep properties of the corresponding composites at room temperature. The bonding is obtained by reacting the glass spheres with an azide functional alkoxysilane which is capable of bonding to the HDPE-chain. The internal stress, evaluated from relaxation experiments, increased markedly as a result of this treatment, and it is suggested that the internal stress level reflects the properties of the interphase region between the filler and the bulk matrix and its effect on the viscoelastic properties.

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“…In such cases, a closer inspection of the relations involved shows that the constant ~ has the form 10/a0, the numerical factor deriving from eq. (2). In this way the linearity of the process is restored.…”

Section: Final Remarksmentioning

confidence: 93%

“…(7), eq. (6) A particular feature of this model is its capacity to explain, at least in semiquantitative terms, the empirical relation (2). The method used in arriving at eq.…”

Section: Two-level Model With a ~ B Transitionsmentioning

confidence: 99%

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A two-level system with induced transitions as a model of stress relaxation

1985

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This paper outlines the basic features of a two-level cooperative model of the stress relaxation in solids. In contrast to similar models presented earlier, the transitions between the two energy levels can take place in both directions, the relaxation process thus assuming a quasi-equilibrium character. The kinetics of this model are the same as obtained in the model where the transitions take place from the higher to the lower level only.

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On the analysis of stress relaxation experiments

Cited by 53 publications

References 7 publications

Stress relaxation, creep, and internal stresses in high density polyethylene filled with calcium carbonate

Stress relaxation, creep, and internal stresses in high density polyethylene filled with calcium carbonate

The effect of a coupling agent on the viscoelastic properties and internal stresses in high density polyethylene filled with glass spheres

A two-level system with induced transitions as a model of stress relaxation

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