Deformation adiabatic

It is well-known [6, 7], that at the adiabatic deformation of rubber its temperature is increased. The analysis of this phenomenon in the works [6, 7] is not quite correct. That is why let us consider the adiabatic deformation of the m-ball with the use of obtained thermodynamic ratios. 

In accordance with the experimental data the temperature change at the adiabatic deformation of rubber is slight, that is why it can be assumed that AT = T — T0 T0 this permits to re-write (41) with taking into account the expression (37) for j3 in following form... 

For the shortness let us confine to the numerical analysis of the isothermal and adiabatic deformation of natural rubber, which at comparatively low chains cross-linking can be described as a melt. 

Temperature change at adiabatic deformation of natural rubber was calculated accordingly to eq. (43) which under assumption cv = cv°N, where cv° = cp° is molar heat of the isoprene carries to... 

Figure 2. Temperature increasing at adiabatic deformation of natural rubber at its stretching (y z > l) and...

By localized adiabatic deformation of a thin layer during mechanical failure of a sample [9]... 

In this respect, textile polymers can almost be described in the same way as isotropic polymers in terms of their viscoelastic behavior, but not quite. The same relative criteria apply, such as elastic deformation, primary creep, yield, secondary creep, creep recovery, isothermal, or adiabatic deformation. 

The different terms in the model assume that the flow stress curve is independently affected by equivalent plastic strain, equivalent plastic strain rate, and temperature. In this model, the temperature is influenced at high equivalent strain rates due to the adiabatic deformation. As a result of the complex interrelations between the material law parameters, the existing approaches show major... 

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