By Nicolas Boyard
This booklet addresses normal details, strong practices and examples approximately thermo-physical homes, thermo-kinetic and thermo-mechanical couplings, instrumentation in thermal technology, thermal optimization and infrared radiation.
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Additional resources for Heat Transfers in Polymer Composite Materials: Forming Processes
13] where x is the distance between the gate and the position of the sensor: √ = . 1955( ) . 14] Knowing that Dh is equal to 2 h, by defining a Fourier number Fo = at / h2, we obtain the time t for which both heat fluxes are equal. 78( . 9. 2. 10-3m, and the sensor F1 is at x = 67 mm from the gate. s-1. 27 s. 7 s. 9 that this time corresponds remarkably well with the beginning of the plateau. 1, we also obtain very interesting results. 10 presents the position of the sensors on the wall of the SWIM molding cavity.
The shrinkage and the deformation of the sample surfaces in contact with the pistons are compensated by the use of a ductile joint (Teflon® or elastomer). 1(b)). The advantage is that the pressure is hydrostatic (applied by a bellows piezometer), in both solid and fluid states. However, heating and cooling rates are limited (few degrees per minute) due to the thermal inertia of the high-pressure vessel. This type of device, besides the use of mercury forbidden by the legislation of some countries, imposes the use of samples with a geometry which is not well defined, making it difficult to take into account the temperature and transformation gradients, this point being essential for samples of several grams with heating or cooling rates representative of the matrices conditions of use.
The temperature Tm0 refers to the thermodynamic melting temperature. The effect of pressure on the kinetics is related to the increase in the thermodynamic melting temperature when the pressure P increases, which has to be taken into account in the expression for the kinetics [LEG 10, FUL 01]. 13 shows the excellent agreement between simulated Introduction to Heat Transfer in Composites 21 and measured temperatures in the core of the part [LEG 11]. The modeling of heat transfer includes crystallization heat source, including the pressure effect.
Heat Transfers in Polymer Composite Materials: Forming Processes by Nicolas Boyard