thermal expansion coefficient


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thermal expansion coefficient

[′thər·məl ik¦span·chən ‚kō·i‚fish·ənt]
(physics)
The fractional change in length or volume of a material for a unit change in temperature.
References in periodicals archive ?
A considerable peak is reached in the alfin region, since the thermal expansion coefficient of the piston aluminum alloy is almost double than the one of the alfin cast iron.
For alloy FeC at the same temperature when the concentration of interstitial atoms increases, the thermal expansion coefficient [[alpha].sub.T] and the heat capacity at constant pressure CP decrease.
Results revealed that the temperature effects on granodiorite can be described by interrelations between the bulk modulus and the thermal expansion coefficient. The thermal expansion coefficient influenced by stress, as well as the heat-transfer processes influenced by path, affects the rock thermomechanical behavior.
where w is the test function, [OMEGA] is the model domain, [GAMMA] is the domain boundary, t is the traction vector, superscripts +/- refer to the value of the corresponding parameters on opposite sides of the fracture surfaces, respectively, Ss is the specific storage, n is the porosity, [q.sub.H] is the volumetric Darcy flux, [beta] is the thermal expansion coefficient, [Q.sub.H] is the fluid sink/source term between the fractures, [q.sub.T] is the heat flux, [c.sub.p] is the specific heat capacity, [b.sub.m] and [b.sub.h] are mechanical and hydraulic fracture apertures, [Q.sub.T] is the heat sink/source term, [alpha] is the thermal expansion coefficient, [lambda] is the thermal conductivity, and d refers to the fracture plane.
When the heating rate increased from 5[degrees]C/min to 50[degrees]C/min, the longitudinal wave velocity decreased from 2.500 km/s to 0.704 km/s, with an amplitude of 15.49%; the density decreased from 2.32 g/[cm.sup.3] to 2.18 g/[cm.sup.3], with an amplitude of 6.02%; and the thermal expansion coefficient increased linearly.
At fixed value of the thermal expansion coefficient, by increasing Young's modulus of the insulate coating, the equivalent stress increases in the steel pipe and remains practically constant in both the polyethylene jacket and the insulate coating.
Thermal expansion coefficient value (a) of glass waste was determined by dilatometry measurements.
Bae et al developed a non-hydrolytic transparent composite with excellent transparency, heat resistance and a low thermal expansion coefficient. This consists of a glass filler dispersed in a crosslinked transparent silicone resin produced by a non-hydrolytic reaction.
However, the problem of wafer bowing, which results from the difference in thermal expansion coefficient between GaN epitaxial layer and sapphire, has become much more serious in larger-diameter wafers.
I think assuming that the material properties, particularly the thermal expansion coefficient, of the metal plate are isotropic, the diameter of the hole will expand on heating.
In the case of austenitic filler materials, the cracking occurred both at the top of the "V" and in the HAZ/MZ interface due to the discrepancy in thermal expansion coefficient. The major crack leading to failure generally occurred in the HAZ/BM interface (Figures 11, 12 and 14).
There are four material properties that are of particular relevance for the different simulations: dynamic viscosity and heat capacity for the injection molding simulation; and thermal expansion coefficient and modulus of elasticity for the thermoelastic simulation.

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