To quantify the effects of friction and adiabatic heating on the mechanical response of the material, numerical simulations have been performed.
Since we are using the reference stress-strain response as input, we assume that any adiabatic heating is implicitly included in this input response.
As adiabatic heating
also affects HPP performance, these points should be considered when planning experiments:
At present there is little literature available on high strain rate testing under biaxial conditions or the effect that adiabatic heating has at these high strain rates.
The cause of this believed to be due to adiabatic heating occurring at higher deformation rates resulting in significant temperature rises in the polymer during stretching as suggested by Buckley et al.
To study the destabilization of tensile drawing by high-rate adiabatic heating, Leevers et al.
We now investigate the possibility that, at high strain rates, softening by adiabatic heating counteracts intrinsic strain hardening and eliminates the second tangent.
1c], referred to previously, implies that it may be considered as intrinsic toughness parameter (7-9) (in so far as geometrical effects, including adiabatic heating can be ignored).
Regardless of whether the local stress-state or degree of adiabatic heating evolve with test speed, it cannot be assumed a priori that the physical mechanisms underlying ultimate failure are rate independent, so that the observation of a rate dependence in We is consistent with its interpretation as a materials parameter.
The effect of adiabatic heating
during plastic deformation on the [T.
The increasing stress oscillation with increasing test frequency up to 100 Hz is likely an effect of adiabatic heating
Other mechanisms for failure include cold drawing and adiabatic heating (viscous flow): neither of these will be considered for developing a selective grinding process.
Higher projectile velocities led to adiabatic heating and decomposition in the PVC samples.
For polyethylene, the thermal diffusion equation included terms for the heat of fusion generated during crystallization and for adiabatic heating
resulting from the applied pressure.
Therefore, the field strength and the internal heat generation rate in the gasket were estimated using calorimetry or adiabatic heating
of the gasket while measuring the temperature rise (16).